Article
Astronomy & Astrophysics
P. Gorrini, N. Astudillo-Defru, S. Dreizler, M. Damasso, R. F. Diaz, X. Bonfils, S. Jeffers, J. R. Barnes, F. Del Sordo, J-M Almenara, E. Artigau, F. Bouchy, D. Charbonneau, X. Delfosse, R. Doyon, P. Figueira, T. Forveille, C. A. Haswell, M. J. Lopez-Gonzalez, C. Melo, R. E. Mennickent, G. Gaisne, N. Morales Morales, F. Murgas, F. Pepe, E. Rodriguez, N. C. Santos, L. Tal-Or, Y. Tsapras, S. Udry
Summary: This study aims to confirm or dismiss the existence of planet GJ 832c through additional data analysis. The results show that the rotation period of GJ 832 is 37.5 days, and there is an RV signal near 18 days, but there is no evidence for the existence of a second planet.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. M. Almenara, X. Bonfils, J. F. Otegi, O. Attia, M. Turbet, N. Astudillo-Defru, K. A. Collins, A. S. Polanski, V Bourrier, C. Hellier, C. Ziegler, F. Bouchy, C. Briceno, D. Charbonneau, M. Cointepas, K. Collins, I Crossfield, X. Delfosse, R. F. Diaz, C. Dorn, J. P. Doty, T. Forveille, G. Gaisne, T. Gan, R. Helled, K. Hesse, J. M. Jenkins, E. L. N. Jensen, D. W. Latham, N. Law, A. W. Mann, S. Mao, B. McLean, F. Murgas, G. Myers, S. Seager, A. Shporer, T. G. Tan, J. D. Twicken, J. Winn
Summary: We report the discovery of GJ 3090 b, a mini-Neptune exoplanet orbiting a bright M2 dwarf star. The planet has a short orbital period of 2.9 days and was confirmed using radial velocity measurements. The low density and presence of volatiles suggest a unique atmospheric composition and make GJ 3090 b an important target for studying the transition between super-Earths and mini-Neptunes.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. M. Almenara, X. Bonfils, T. Forveille, N. Astudillo-Defru, D. R. Ciardi, R. P. Schwarz, K. A. Collins, M. Cointepas, M. B. Lund, F. Bouchy, D. Charbonneau, R. F. Diaz, X. Delfosse, R. C. Kidwell, M. Kunimoto, D. W. Latham, J. J. Lissauer, F. Murgas, G. Ricker, S. Seager, M. Vezie, D. Watanabe
Summary: The Transiting Exoplanet Survey Satellite (TESS) mission has identified a sub-Saturn planet orbiting the M4 dwarf star TOI-3884, with a deep and asymmetric transit-like signal. Follow-up observations have confirmed the non-uniformity of the transit, indicating interactions between the planet and the host star.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. Kemmer, S. Dreizler, D. Kossakowski, S. Stock, A. Quirrenbach, J. A. Caballero, P. J. Amado, K. A. Collins, N. Espinoza, E. Herrero, J. M. Jenkins, D. W. Latham, J. Lillo-Box, N. Narita, E. Palle, A. Reiners, I Ribas, G. Ricker, E. Rodriguez, S. Seager, R. Vanderspek, R. Wells, J. Winn, F. J. Aceituno, V. J. S. Bejar, T. Barclay, P. Bluhm, P. Chaturvedi, C. Cifuentes, K. Collins, M. Cortes-Contreras, B-O Demory, M. M. Fausnaugh, A. Fukui, Y. Gomez Maqueo Chew, D. Galadi-Enriquez, T. Gan, M. Gillon, A. Golovin, A. P. Hatzes, Th Henning, C. Huang, S. Jeffers, A. Kaminski, M. Kunimoto, M. Kurster, M. J. Lopez-Gonzalez, M. Lafarga, R. Luque, J. McCormac, K. Molaverdikhani, D. Montes, J. C. Morales, V. M. Passegger, S. Reffert, L. Sabin, P. Schofer, N. Schanche, M. Schlecker, U. Schroffenegger, R. P. Schwarz, A. Schweitzer, A. Sota, P. Tenenbaum, T. Trifonov, S. Vanaverbeke, M. Zechmeister
Summary: We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby star GJ 3929. By analyzing photometric, spectroscopic, and transit observations, the important parameters of this planet were determined, and another planet candidate was found.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
E. Gonzalez-Alvarez, A. Petralia, G. Micela, J. Maldonado, L. Affer, A. Maggio, E. Covino, M. Damasso, A. F. Lanza, M. Perger, M. Pinamonti, E. Poretti, G. Scandariato, A. Sozzetti, A. Bignamini, P. Giacobbe, G. Leto, I Pagano, R. Zanmar Sanchez, J. Gonzalez Hernandez, R. Rebolo, I Ribas, A. Suarez Mascareno, B. Toledo-Padron
Summary: The study focused on detecting small planets around M-dwarf stars, particularly on the M0.5 V star GJ 720 A located 15.56 pc away. By analyzing radial velocity, stellar activity indicators, and photometric light curves, the researchers identified a subNeptune mass planet orbiting GJ 720 A.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
C. Moutou, X. Delfosse, A. C. Petit, J. -f. Donati, E. Artigau, P. Fouque, A. Carmona, M. Ould-Elhkim, L. Arnold, N. J. Cook, C. Cadieux, S. Bellotti, I. Boisse, F. Bouchy, P. Charpentier, P. Cortes-Zuleta, R. Doyon, G. Hebrard, E. Martioli, J. Morin, T. Vandal
Summary: The SPIRou Legacy Survey collected data and conducted a blind search for exoplanets around nearby cool stars. This paper presents the program, properties, and revisits the radial velocity data of two multiplanet systems. SPIRou data allows for precise RV extraction and magnetic field reconstruction. The study provides insights into the blind search process, observation strategy, limitations, and revisits known multiplanet systems.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Lu Bai, Shenghong Gu, Xiaobin Wang, Leilei Sun, Chi-Tai Kwok, Ho-Keung Hui
Summary: In this study, we observed the WASP-12 exoplanetary system using telescopes from Yunnan Observatories, and analyzed the photometric transit light curves and planetary orbit changes. Our findings suggest that the radius of WASP-12b varies with wavelength and there may be a lack of certain substances in its upper atmosphere. Additionally, significant changes were observed in the planetary orbit.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
L. Delrez, A. Leleu, A. Brandeker, M. Gillon, M. J. Hooton, A. Collier Cameron, A. Deline, A. Fortier, D. Queloz, A. Bonfanti, V. Van Grootel, T. G. Wilson, J. A. Egger, Y. Alibert, R. Alonso, G. Anglada, J. Asquier, T. Barczy, D. Navascues, S. C. C. Barros, W. Baumjohann, M. Beck, T. Beck, W. Benz, N. Billot, X. Bonfils, L. Borsato, C. Broeg, M. Buder, J. Cabrera, V. Cessa, S. Charnoz, Sz. Csizmadia, P. E. Cubillos, M. B. Davies, M. Deleuil, O. D. S. Demangeon, B. -O. Demory, D. Ehrenreich, A. Erikson, L. Fossati, M. Fridlund, D. Gandolfi, M. Guedel, J. Hasiba, S. Hoyer, K. G. Isaak, J. M. Jenkins, L. L. Kiss, J. Laskar, D. W. Latham, A. Lecavelier des Etangs, M. Lendl, C. Lovis, R. Luque, D. Magrin, P. F. L. Maxted, C. Mordasini, V. Nascimbeni, G. Olofsson, R. Ottensamer, I. Pagano, E. Palle, G. Peter, G. Piotto, D. Pollacco, R. Ragazzoni, N. Rando, H. Rauer, I. Ribas, G. Ricker, N. C. Santos, G. Scandariato, S. Seager, D. Segransan, A. E. Simon, A. M. S. Smith, S. G. Sousa, M. Steller, Gy. M. Szabo, N. Thomas, S. Udry, R. Vanderspek, J. Venturini, V. Viotto, N. A. Walton, J. N. Winn
Summary: The TOI-178 system, consisting of six planets, has been extensively studied to improve understanding of the physical and orbital parameters of the planets as well as their transit timing variations. The analysis refines transit parameters and provides constraints on potential additional planets in the system.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
E. Martioli, G. Hebrard, A. C. M. Correia, J. Laskar, A. Lecavelier des Etangs
Summary: AU Mic is a young, active star with a detected transiting planet b, and newly observed potential planet c. Both planets are Neptune-size, in near 9:4 mean-motion resonance, with planet c likely to be inflated based on non-detection of significant transit-timing variations. The system presents a key opportunity for studying infant planet atmospheres and early stage planet-planet interactions.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
E. Martioli, G. Hebrard, P. Fouque, E. Artigau, J-F Donati, C. Cadieux, S. Bellotti, A. Lecavelier des Etangs, R. Doyon, J-D Jr Jr Do Nascimento, L. Arnold, A. Carmona, N. J. Cook, P. Cortes-Zuleta, L. de Almeida, X. Delfosse, C. P. Folsom, P-C Koenig, C. Moutou, M. Ould-Elhkim, P. Petit, K. G. Stassun, A. A. Vidotto, T. Vandal, B. Benneke, I Boisse, X. Bonfils, P. Boyd, C. Brasseur, D. Charbonneau, R. Cloutier, K. Collins, P. Cristofari, I Crossfield, R. F. Diaz, M. Fausnaugh, P. Figueira, T. Forveille, E. Furlan, E. Girardin, C. L. Gnilka, J. Gomes da Silva, P-G Gu, P. Guerra, S. B. Howell, G. A. J. Hussain, J. M. Jenkins, F. Kiefer, D. W. Latham, R. A. Matson, E. C. Matthews, J. Morin, R. Naves, G. Ricker, S. Seager, M. Takami, J. D. Twicken, A. Vanderburg, R. Vanderspek, J. Winn
Summary: The study of TOI-1759 b involved the detection and characterization of a gas-dominated sub-Neptune through TESS photometric time series and SPIRou near-infrared spectropolarimetric data. Various system parameters were measured and analyzed, along with the rotational modulation of magnetic stellar activity and large-scale surface magnetic field reconstruction.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
D. Rodgers-Lee, P. B. Rimmer, A. A. Vidotto, A. J. Louca, A. M. Taylor, A. L. Mesquita, Y. Miguel, O. Venot, C. Helling, P. Barth, E. Lacy
Summary: A key step to understand the impact of energetic particles in exoplanet atmospheres is to detect the chemical signature of ionization caused by stellar energetic particles and cosmic rays. By studying GJ 436, a well-known M dwarf with a warm Neptune-like exoplanet, researchers demonstrate how to estimate the maximum momentum of stellar energetic particles based on stellar X-ray luminosity. The results provide insights into the ionization rates caused by energetic particles in the atmosphere of exoplanets and will help quantify their chemical signatures.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
M. Perger, I Ribas, G. Anglada-Escude, J. C. Morales, P. J. Amado, J. A. Caballero, A. Quirrenbach, A. Reiners, V. J. S. Bejar, S. Dreizler, D. Galadi-Enriquez, A. P. Hatzes, Th Henning, S. Jeffers, A. Kaminski, M. Kuerster, M. Lafarga, D. Montes, E. Palle, C. Rodriguez-Lopez, A. Schweitzer, M. R. Zapatero Osorio, M. Zechmeister
Summary: The study used new high-precision radial velocity measurements to analyze the planetary candidate in the GJ 1151 system, finding that the previously announced candidate planet is controversial and the 2-day signal is more likely to be due to long-term radial velocity variations.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
R. Rattanamala, S. Awiphan, S. Komonjinda, A. Phriksee, P. Sappankum, N. A-thano, S. Chitchak, P. Rittipruk, U. Sawangwit, S. Poshyachinda, D. E. Reichart, J. B. Haislip
Summary: This paper presents the binary model and the eclipse timing variations of RR Cae, a binary system consisting of a white dwarf and an M-type dwarf companion. The authors analyze multiwavelength optical photometry data from TESS, PROMPT-8 telescope, and Thai Robotic Telescope, as well as archive radial velocities from VLT. They obtain the physical parameters of the system and 430 new times of minima. The O-C curve fitting using light travel time effect models suggests the presence of one or two circumbinary objects, possibly planets, with certain periods and minimum masses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
A. Castro-Gonzalez, O. D. S. Demangeon, J. Lillo-Box, C. Lovis, B. Lavie, V. Adibekyan, L. Acuna, M. Deleuil, A. Aguichine, M. R. Zapatero Osorio, H. M. Tabernero, J. Davoult, Y. Alibert, N. Santos, S. G. Sousa, A. Antoniadis-Karnavas, F. Borsa, J. N. Winn, C. Prieto, P. Figueira, J. M. Jenkins, A. Sozzetti, M. Damasso, A. M. Silva, N. Astudillo-Defru, S. C. C. Barros, X. Bonfils, S. Cristiani, P. Di Marcantonio, J. I. Gonzalez Hernandez, G. Lo Curto, C. J. A. P. Martins, N. J. Nunes, E. Palle, F. Pepe, S. Seager, A. Suarez Mascareno
Summary: The aim of this study is to confirm and characterize the TESS planet candidate TOI-244.01, which is found to be a super-Earth with a small radius and mass. The researchers found that atmospheric loss processes may have occurred, but high mean molecular weight volatiles such as water could have been retained. In addition, the internal structure model of this planet is similar to that of Earth, with a core rich in iron and a mantle dominated by silicates.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
R. Luque, G. Nowak, T. Hirano, D. Kossakowski, E. Palle, M. C. Nixon, G. Morello, P. J. Amado, S. H. Albrecht, J. A. Caballero, C. Cifuentes, W. D. Cochran, H. J. Deeg, S. Dreizler, E. Esparza-Borges, A. Fukui, D. Gandolfi, E. Goffo, E. W. Guenther, A. P. Hatzes, T. Henning, P. Kabath, K. Kawauchi, J. Korth, T. Kotani, T. Kudo, M. Kuzuhara, M. Lafarga, K. W. F. Lam, J. Livingston, J. C. Morales, A. Muresan, F. Murgas, N. Narita, H. L. M. Osborne, H. Parviainen, V. M. Passegger, C. M. Persson, A. Quirrenbach, S. Redfield, S. Reffert, A. Reiners, I Ribas, L. M. Serrano, M. Tamura, V. Van Eylen, N. Watanabe, M. R. Zapatero Osorio
Summary: This study presents the measurement of the mass and radius of the sub-Neptune exoplanet G 9-40 b using radial velocity observations. The results suggest the presence of either a water-rich core or a significant hydrogen-rich envelope, indicating inconsistencies with a terrestrial composition. The planet's position in the period-radius space makes it an important target for studying planetary formation and evolution theories.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Michael T. Murphy, Paolo Molaro, Ana C. O. Leite, Guido Cupani, Stefano Cristiani, Valentina D'Odorico, Ricardo Genova Santos, Carlos J. A. P. Martins, Dinko Milakovic, Nelson J. Nunes, Tobias M. Schmidt, Francesco A. Pepe, Rafael Rebolo, Nuno C. Santos, Sergio G. Sousa, Maria-Rosa Zapatero Osorio, Manuel Amate, Vardan Adibekyan, Yann Alibert, Carlos Allende Prieto, Veronica Baldini, Willy Benz, Francois Bouchy, Alexandre Cabral, Hans Dekker, Paolo Di Marcantonio, David Ehrenreich, Pedro Figueira, Jonay Gonzalez Hernandez, Marco Landoni, Christophe Lovis, Gaspare Lo Curto, Antonio Manescau, Denis Megevand, Andrea Mehner, Giuseppina Micela, Luca Pasquini, Ennio Poretti, Marco Riva, Alessandro Sozzetti, Alejandro Suarez Mascareno, Stephane Udry, Filippo Zerbi
Summary: This study presents a new constraint on the relative variations in the fine-structure constant α using high-resolution spectroscopy with the ESO VLT. The observations of the quasar HE 0515-4414 reveal narrow absorption components, allowing for a more robust analysis. The resulting measurement of Δα/α with parts-per-million (ppm) precision provides valuable insights into cosmological variations.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
L. Fossati, G. Guilluy, I. F. Shaikhislamov, I Carleo, F. Borsa, A. S. Bonomo, P. Giacobbe, M. Rainer, C. Cecchi-Pestellini, M. L. Khodachenko, M. A. Efimov, M. S. Rumenskikh, I. B. Miroshnichenko, A. G. Berezutsky, V Nascimbeni, M. Brogi, A. F. Lanza, L. Mancini, L. Affer, S. Benatti, K. Biazzo, A. Bignamini, D. Carosati, R. Claudi, R. Cosentino, E. Covino, S. Desidera, A. Fiorenzano, A. Harutyunyan, A. Maggio, L. Malavolta, J. Maldonado, G. Micela, E. Molinari, I Pagano, M. Pedani, G. Piotto, E. Poretti, G. Scandariato, A. Sozzetti, H. Stoev
Summary: We observed and modeled the atmospheric absorption of metastable HeI in the hot Jupiter WASP-80b, but did not find any signature of planetary absorption. The low He to H abundance ratio in WASP-80b and other planets suggests the presence of physical mechanisms capable of modifying the He to H content in the upper atmosphere of hot Jupiters.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
V Singh, A. S. Bonomo, G. Scandariato, N. Cibrario, D. Barbato, L. Fossati, I Pagano, A. Sozzetti
Summary: This study analyzes optical occultations and phase variations of ultra-short-period sub-Neptunes observed by Kepler and K2, detecting secondary eclipses and phase curve variations for several planets and drawing conclusions about their nature.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
E. Esparza-Borges, M. Oshagh, N. Casasayas-Barris, E. Palle, G. Chen, G. Morello, N. C. Santos, J. Seidel, A. Sozzetti, R. Allart, P. Figueira, V Bourrier, J. Lillo-Box, F. Borsa, M. R. Zapatero Osorio, H. Tabernero, O. D. S. Demangeon, V Adibekyan, J. I. Gonzalez Hernandez, A. Mehner, C. Allende Prieto, P. Di Marcantonio, Y. Alibert, S. Cristiani, G. Lo Curto, C. J. A. P. Martins, G. Micela, F. Pepe, R. Rebolo, S. G. Sousa, A. Suarez Mascareno, S. Udry
Summary: In this paper, we present an alternative approach for recovering the broadband transmission spectra of exoplanets using chromatic Doppler tomography. We use the SOAP tool, CHOCOLATE, for physical modeling and validate the method using observational data obtained with the ESPRESSO instrument. Our findings show that the recovered transmission spectrum is consistent with previous studies. We also infer from spectral retrieval that a model containing H2O and NH3 is the preferred scenario. This method is particularly interesting for studying exoplanets around young and active stars.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. P. Faria, A. Suarez Mascareno, P. Figueira, A. M. Silva, M. Damasso, O. Demangeon, F. Pepe, N. C. Santos, R. Rebolo, S. Cristiani, V Adibekyan, Y. Alibert, R. Allart, S. C. C. Barros, A. Cabral, V D'Odorico, P. Di Marcantonio, X. Dumusque, D. Ehrenreich, J. Gonzalez Hernandez, N. Hara, J. Lillo-Box, G. Lo Curto, C. Lovis, C. J. A. P. Martins, D. Megevand, A. Mehner, G. Micela, P. Molaro, N. J. Nunes, E. Palle, E. Poretti, S. G. Sousa, A. Sozzetti, H. Tabernero, S. Udry, M. R. Zapatero Osorio
Summary: Proxima Centauri, the closest star to the Sun, is found to have a third low-mass planetary companion with a 5.12-day orbital period and a minimum mass of 0.26 M-Earth mass, orbiting at 0.029 au from the star. The signal detected is not caused by stellar variability but is attributed to the presence of a planetary companion with a well constrained orbital eccentricity compatible with a circular orbit.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. Bonavita, C. Fontanive, R. Gratton, K. Muzic, S. Desidera, D. Mesa, B. Biller, A. Scholz, A. Sozzetti, V Squicciarini
Summary: The last decade of direct imaging searches for sub-stellar companions has challenged current formation models and highlighted the low occurrence rate of wide companions. Blind surveys are not an efficient way to increase the sample of direct imaging companions. Efficient target selection methods are essential to ensure a larger number of detections.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
F. Lienhard, A. Mortier, L. Buchhave, A. Collier Cameron, M. Lopez-Morales, A. Sozzetti, C. A. Watson, R. Cosentino
Summary: Finding more reliable radial velocity (RV) extraction methods is crucial for improving the detection threshold of exoplanets. In this study, a multi-mask least-squares deconvolution (MM-LSD) RV extraction pipeline was introduced, which extracts the RV from two-dimensional echelle-order spectra using customized masks after continuum normalization and telluric absorption line correction. Experimental results showed that, compared to the traditional cross-correlation function technique, the MM-LSD pipeline achieved an average 12% lower scatter in RV time series for FGK-type stars with a high signal-to-noise ratio.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Engin Keles, Matthias Mallonn, Daniel Kitzmann, Katja Poppenhaeger, H. Jens Hoeijmakers, Ilya Ilyin, Xanthippi Alexoudi, Thorsten A. Carroll, Julian Alvarado-Gomez, Laura Ketzer, Aldo S. Bonomo, Francesco Borsa, B. Scott Gaudi, Thomas Henning, Luca Malavolta, Karan Molaverdikhani, Valerio Nascimbeni, Jennifer Patience, Lorenzo Pino, Gaetano Scandariato, Everett Schlawin, Evgenya Shkolnik, Daniela Sicilia, Alessandro Sozzetti, Mary G. Foster, Christian Veillet, Ji Wang, Fei Yan, Klaus G. Strassmeier
Summary: The study of exoplanets and their atmospheres using high-resolution transmission spectroscopy is important for understanding their evolution. In this study, the super-Earth exoplanet 55 Cnc e was investigated using high-resolution spectroscopic transit observation. No evidence of a widely extended silicate envelope was found in its transmission spectrum.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Zoe L. de Beurs, Andrew Vanderburg, Christopher J. Shallue, Xavier Dumusque, Andrew Collier Cameron, Christopher Leet, Lars A. Buchhave, Rosario Cosentino, Adriano Ghedina, Raphaelle D. Haywood, Nicholas Langellier, David W. Latham, Mercedes Lopez-Morales, Michel Mayor, Giusi Micela, Timothy W. Milbourne, Annelies Mortier, Emilio Molinari, Francesco Pepe, David F. Phillips, Matteo Pinamonti, Giampaolo Piotto, Ken Rice, Dimitar Sasselov, Alessandro Sozzetti, Stephane Udry, Christopher A. Watson
Summary: This study demonstrates that machine learning techniques, such as linear regression and neural networks, can effectively remove spurious radial velocity signals caused by stellar activity. By solely analyzing the changes in the average shape of spectral lines, these techniques can predict and eliminate activity signals without the need for timing information. The models are trained on both simulated data and observations, and have shown significant improvements in removing stellar activity signals.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
A. Vallenari, A. G. A. Brown, T. Prusti, J. H. J. de Bruijne, F. Arenou, C. Babusiaux, M. Biermann, O. L. Creevey, C. Ducourant, D. W. Evans, L. Eyer, R. Guerra, A. Hutton, C. Jordi, S. A. Klioner, U. L. Lammers, L. Lindegren, X. Luri, F. Mignard, C. Panem, D. Pourbaix, S. Randich, P. Sartoretti, C. Soubiran, P. Tanga, N. A. Walton, C. A. L. Bailer-Jones, U. Bastian, R. Drimmel, F. Jansen, D. Katz, M. G. Lattanzi, F. vanLeeuwen, J. Bakker, C. Cacciari, J. Castaneda, F. De Angeli, C. Fabricius, M. Fouesneau, Y. Fremat, L. Galluccio, A. Guerrier, U. Heiter, E. Masana, R. Messineo, N. Mowlavi, C. Nicolas, K. Nienartowicz, F. Pailler, P. Panuzzo, F. Riclet, W. Roux, G. M. Seabroke, R. Sordo, F. Thevenin, G. Gracia-Abril, J. Portell, D. Teyssier, M. Altmann, R. Andrae, M. Audard, I. Bellas-Velidis, K. Benson, J. Berthier, R. Blomme, P. W. Burgess, D. Busonero, G. Busso, H. Canovas, B. Carry, A. Cellino, N. Cheek, G. Clementini, Y. Damerdji, M. Davidson, P. Deteodoro, M. Nunez Campos, L. Delchambre, A. Dell'Oro, P. Esquej, J. Fernandez-Hernandez, E. Fraile, D. Garabato, P. Garcia-Lario, E. Gosset, R. Haigron, J. -L. Halbwachs, N. C. Hambly, D. L. Harrison, J. Hernandez, D. Hestroffer, S. T. Hodgkin, B. Holl, K. Janssen, G. Jevardat deFombelle, S. Jordan, A. Krone-Martins, A. C. Lanzafame, W. Loeffler, O. Marchal, P. M. Marrese, A. Moitinho, K. Muinonen, P. Osborne, E. Pancino, T. Pauwels, A. Recio-Blanco, C. Reyle, M. Riello, L. Rimoldini, T. Roegiers, J. Rybizki, L. M. Sarro, C. Siopis, M. Smith, A. Sozzetti, E. Utrilla, M. vanLeeuwen, U. Abbas, P. Abraham, A. Abreu Aramburu, C. Aerts, J. J. Aguado, M. Ajaj, F. Aldea-Montero, G. Altavilla, M. A. Alvarez, J. Alves, F. Anders, R. I. Anderson, E. Anglada Varela, T. Antoja, D. Baines, S. G. Baker, L. Balaguer-Nunez, E. Balbinot, Z. Balog, C. Barache, D. Barbato, M. Barros, M. A. Barstow, S. Bartolome, J. -L. Bassilana, N. Bauchet, U. Becciani, M. Bellazzini, A. Berihuete, M. Bernet, S. Bertone, L. Bianchi, A. Binnenfeld, S. Blanco-Cuaresma, A. Blazere, T. Boch, A. Bombrun, D. Bossini, S. Bouquillon, A. Bragaglia, L. Bramante, E. Breedt, A. Bressan, N. Brouillet, E. Brugaletta, B. Bucciarelli, A. Burlacu, A. G. Butkevich, R. Buzzi, E. Caffau, R. Cancelliere, T. Cantat-Gaudin, R. Carballo, T. Carlucci, M. I. Carnerero, J. M. Carrasco, L. Casamiquela, M. Castellani, A. Castro-Ginard, L. Chaoul, P. Charlot, L. Chemin, V. Chiaramida, A. Chiavassa, N. Chornay, G. Comoretto, G. Contursi, W. J. Cooper, T. Cornez, S. Cowell, F. Crifo, M. Cropper, M. Crosta, C. Crowley, C. Dafonte, A. Dapergolas, M. David, P. David, P. deLaverny, F. DeLuise, R. DeMarch, J. DeRidder, R. deSouza, A. deTorres, E. F. del Peloso, E. delPozo, M. Delbo, A. Delgado, J. -B. Delisle, C. Demouchy, T. E. Dharmawardena, P. Di Matteo, S. Diakite, C. Diener, E. Distefano, C. Dolding, B. Edvardsson, H. Enke, C. Fabre, M. Fabrizio, S. Faigler, G. Fedorets, P. Fernique, A. Fienga, F. Figueras, Y. Fournier, C. Fouron, F. Fragkoudi, M. Gai, A. Garcia-Gutierrez, M. Garcia-Reinaldos, M. Garcia-Torres, A. Garofalo, A. Gavel, P. Gavras, E. Gerlach, R. Geyer, P. Giacobbe, G. Gilmore, S. Girona, G. Giu Ff Rida, R. Gomel, A. Gomez, J. Gonzalez-Nunez, I. Gonzalez-Santamaria, J. J. Gonzalez-Vidal, M. Granvik, P. Guillout, J. Guiraud, R. Gutierrez-Sanchez, L. P. Guy, D. Hatzidimitriou, M. Hauser, M. Haywood, A. Helmer, A. Helmi, M. H. Sarmiento, S. L. Hidalgo, T. Hilger, N. Hladczuk, D. Hobbs, G. Holland, H. E. Huckle, K. Jardine, G. Jasniewicz, A. Jean-Antoine Piccolo, O. Jimenez-Arranz, A. Jorissen, J. Juaristi Campillo, F. Julbe, L. Karbevska, P. Kervella, S. Khanna, M. Kontizas, G. Kordopatis, A. J. Korn, A. Kospal, Z. Kostrzewa-Rutkowska, K. Kruszynska, M. Kun, P. Laizeau, S. Lambert, A. F. Lanza, Y. Lasne, J. -F. LeCampion, Y. Lebreton, T. Lebzelter, S. Leccia, N. Leclerc, I. Lecoeur-Taibi, S. Liao, E. L. Licata, H. E. P. Lindstrom, T. A. Lister, E. Livanou, A. Lobel, A. Lorca, C. Loup, P. MadreroPardo, A. MagdalenoRomeo, S. Managau, R. G. Mann, M. Manteiga, J. M. Marchant, M. Marconi, J. Marcos, M. M. S. MarcosSantos, D. MarinPina, S. Marinoni, F. Marocco, D. J. Marshall, L. Martin Polo, J. M. Martin-Fleitas, G. Marton, N. Mary, A. Masip, D. Massari, A. Mastrobuono-Battisti, T. Mazeh, P. J. McMillan, S. Messina, D. Michalik, N. R. Millar, A. Mints, D. Molina, R. Molinaro, L. Molnar, G. Monari, M. Monguio, P. Montegriffo, A. Montero, R. Mor, A. Mora, R. Morbidelli, T. Morel, D. Morris, T. Muraveva, C. P. Murphy, I. Musella, Z. Nagy, L. Noval, F. Ocana, A. Ogden, C. Ordenovic, J. O. Osinde, C. Pagani, I. Pagano, L. Palaversa, P. A. Palicio, L. Pallas-Quintela, A. Panahi, S. Payne-Wardenaar, X. Penalosa Esteller, A. Penttila, B. Pichon, A. M. Piersimoni, F. -X. Pineau, E. Plachy, G. Plum, E. Poggio, A. Prsa, L. Pulone, E. Racero, S. Ragaini, M. Rainer, C. M. Raiteri, N. Rambaux, P. Ramos, M. Ramos-Lerate, P. ReFiorentin, S. Regibo, P. J. Richards, C. Rios Diaz, V. Ripepi, A. Riva, H. -W. Rix, G. Rixon, N. Robichon, A. C. Robin, C. Robin, M. Roelens, H. R. O. Rogues, L. Rohrbasser, M. Romero-Gomez, N. Rowell, F. Royer, D. Ruz Mieres, K. A. Rybicki, G. Sadowski, A. Saez Nunez, A. Sagrista Selles, J. Sahlmann, E. Salguero, N. Samaras, V. Sanchez Gimenez, N. Sanna, R. Santovena, M. Sarasso, M. Schultheis, E. Sciacca, M. Segol, J. C. Segovia, D. Segransan, D. Semeux, S. Shahaf, H. I. Siddiqui, A. Siebert, L. Siltala, A. Silvelo, E. Slezak, I. Slezak, R. L. Smart, O. N. Snaith, E. Solano, F. Solitro, D. Souami, J. Souchay, A. Spagna, L. Spina, F. Spoto, I. A. Steele, H. Steidelmueller, C. A. Stephenson, M. Suveges, J. Surdej, L. Szabados, E. Szegedi-Elek, F. Taris, M. B. Taylor, R. Teixeira, L. Tolomei, N. Tonello, F. Torra, J. Torra, G. Torralba Elipe, M. Trabucchi, A. T. Tsounis, C. Turon, A. Ulla, N. Unger, M. V. Vaillant, E. van Dillen, W. van Reeven, O. Vanel, A. Vecchiato, Y. Viala, D. Vicente, S. Voutsinas, M. Weiler, T. Wevers, L. Wyrzykowski, A. Yoldas, P. Yvard, H. Zhao, J. Zorec, S. Zucker, T. Zwitter
Summary: The third data release of the Gaia mission includes a wide range of new data products, such as an expanded radial velocity survey and extensive astrophysical characterisation. This release provides unprecedented quantity, quality, and variety of source astrophysical data, including spectrophotometry, radial velocities, variables, and astrophysical parameters. It will greatly enhance the potential of Gaia's astrometric, photometric, and radial velocity surveys.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Desidera, M. Damasso, R. Gratton, S. Benatti, D. Nardiello, V. D'Orazi, A. F. Lanza, D. Locci, F. Marzari, D. Mesa, S. Messina, I. Pillitteri, A. Sozzetti, J. Girard, A. Maggio, G. Micela, L. Malavolta, V. Nascimbeni, M. Pinamonti, V. Squicciarini, J. Alcala, K. Biazzo, A. Bohn, M. Bonavita, K. Brooks, G. Chauvin, E. Covino, P. Delorme, J. Hagelberg, M. Janson, A. -M. Lagrange, C. Lazzoni
Summary: TESS confirmed the presence of the transiting planet TOI-179 orbiting the K dwarf HD 18599. The system was characterized using TESS photometric time series, HARPS radial velocity monitoring, and high-contrast imaging observations from VLT. Gaussian process regression analysis was used to model the magnetic activity of the star and identify the Keplerian signature of the transiting planet.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Michelle Kunimoto, Andrew Vanderburg, Chelsea X. Huang, M. Ryleigh Davis, Laura Affer, Andrew Collier Cameron, David Charbonneau, Rosario Cosentino, Mario Damasso, Xavier Dumusque, A. F. Martnez Fiorenzano, Adriano Ghedina, R. D. Haywood, Florian Lienhard, Mercedes Lopez-Morales, Michel Mayor, Francesco Pepe, Matteo Pinamonti, Ennio Poretti, Jesus Maldonado, Ken Rice, Alessandro Sozzetti, Thomas G. Wilson, Stephane Udry, Jay Baptista, Khalid Barkaoui, Juliette Becker, Paul Benni, Allyson Bieryla, Pau Bosch-Cabot, David R. Ciardi, Karen A. Collins, Kevin I. Collins, Elise Evans, Trent J. Dupuy, Maria V. Goliguzova, Pere Guerra, Adam Kraus, Jack J. Lissauer, Daniel Huber, Felipe Murgas, Enric Palle, Samuel N. Quinn, Boris S. Safonov, Richard P. Schwarz, Avi Shporer, Keivan G. Stassun, Jon M. Jenkins, David W. Latham, George R. Ricker, Sara Seager, Roland Vanderspek, Joshua Winn, Zahra Essack, Hannah M. Lewis, Mark E. Rose
Summary: We have confirmed the existence of three exoplanets orbiting TOI-4010 (TIC-352682207), a metal-rich K dwarf, through the Transiting Exoplanet Survey Satellite observations. With the High Accuracy Radial velocity Planet Searcher, we measured the masses of these planets with a precision of 8-12%. The exoplanets include a sub-Neptune (TOI-4010 b) in the hot-Neptune desert, two similarly sized sub-Saturns (TOI-4010 c and d) on short-period orbits, and a super-Jupiter-mass companion (TOI-4010 e) in a long-period, eccentric orbit.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
M. Damasso, D. Locci, S. Benatti, A. Maggio, D. Nardiello, M. Baratella, K. Biazzo, A. S. Bonomo, S. Desidera, V. D'Orazi, M. Mallonn, A. F. Lanza, A. Sozzetti, F. Marzari, F. Borsa, J. Maldonado, L. Mancini, E. Poretti, G. Scandariato, A. Bignamini, L. Borsato, R. Capuzzo Dolcetta, M. Cecconi, R. Claudi, R. Cosentino, E. Covino, A. Fiorenzano, A. Harutyunyan, A. W. Mann, G. Micela, E. Molinari, M. Molinaro, I. Pagano, M. Pedani, M. Pinamonti, G. Piotto, H. Stoev
Summary: GAPS collaboration conducted spectroscopic and photometric follow-up of young stars with planets to understand the early evolution of planetary systems. They measured the masses, sizes, and orbital parameters of the planets around HD63433 and studied the evolution of atmospheric mass-loss rate. Their findings suggest that HD63433 c might be a dense mini-Neptune.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
E. M. Amazo-Gomez, J. D. Alvarado-Gomez, K. Poppenhaeger, G. A. J. Hussain, B. E. Wood, J. J. Drake, J-D do Nascimento Jr, F. Anthony, J. Sanz-Forcada, B. Stelzer, F. Del Sordo, M. Damasso, S. Redfield, J. F. Donati, P. C. Koenig, G. Hebrard, P. A. Miles-Paez
Summary: A comprehensive multiwavelength campaign was conducted to study the activity and variability of the young Sun-like star iota-Horologii. The results from long-term spectropolarimetric monitoring, high-precision photometry, and observations in ultraviolet spectral regions revealed the star's rotation period and characterized its variability through various activity proxies. The correlation between different observables provided a more complete understanding of the observed variability, from the photosphere to the corona.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)