Article
Astronomy & Astrophysics
M. Perger, G. Anglada-Escude, D. Baroch, M. Lafarga, I. Ribas, J. C. Morales, E. Herrero, P. J. Amado, J. R. Barnes, J. A. Caballero, S. V. Jeffers, A. Quirrenbach, A. Reiners
Summary: Using a deep neural network approach, this study demonstrates that it is possible to produce activity-free Doppler measurements of stars by removing spurious Doppler variability caused by known physical effects.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Y. G. C. Frensch, G. Lo Curto, F. Bouchy, M. Mayor, G. Hebrard, C. Lovis, C. Moutou, F. A. Pepe, D. Queloz, N. Santos, D. Segransan, S. Udry, N. Unger
Summary: This study utilized a 19-year dataset from the HARPS radial velocity survey to detect and characterize long-period companions around main sequence stars. They discovered six exoplanets, one uncertain exoplanet candidate, one brown dwarf, and five stellar binaries. The findings include Jupiter-mass exoplanets, a highly irradiated Neptune, and a brown dwarf with a highly eccentric orbit. This research is significant for understanding the nature of long-period exoplanets and brown dwarfs.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
K. Dsilva, T. Shenar, H. Sana, P. Marchant
Summary: This paper presents the observed and intrinsic multiplicity properties of the early-type nitrogen-rich WR stars in the northern Galaxy, and compares them with the carbon-rich WR stars. The results show that the multiplicity parameters of the early-type nitrogen-rich WR population are similar to those of main-sequence O binaries, but different from those of the carbon-rich WR population.
ASTRONOMY & ASTROPHYSICS
(2022)
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
N. Meunier, R. Pous, S. Sulis, D. Mary, A. -M. Lagrange
Summary: The paper aims to investigate the feasibility of achieving a 10% mass uncertainty using radial velocity follow-up of transits and to analyze and quantify the detectability of Earth-like planets for various spectral types. Blind tests using synthetic time series show that the targeted 10% mass uncertainty cannot be reached even with an improved version of the usual correction of stellar activity and long-duration observations. Therefore, new methods must be devised to correct for stellar activity in order to achieve the 10% uncertainty goal or detect such planets.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Stephan Stock, Jonas Kemmer, Diana Kossakowski, Silvia Sabotta, Sabine Reffert, Andreas Quirrenbach
Summary: In this study, the performance and properties of the quasi-periodic Gaussian process (QP-GP) kernel were analyzed using synthetic radial velocity data. It was found that the QP-GP method considerably improves planet detection efficiency and leads to precise planet parameters. However, there are cases where the QP-GP does not perform optimally.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
E. Gonzalez-Alvarez, M. R. Zapatero Osorio, J. Sanz-Forcada, J. A. Caballero, S. Reffert, V. J. S. Bejar, A. P. Hatzes, E. Herrero, S. Jeffers, J. Kemmer, M. J. Lopez-Gonzalez, R. Luque, K. Molaverdikhani, G. Morello, E. Nagel, A. Quirrenbach, E. Rodriguez, C. Rodriguez-Lopez, M. Schlecker, A. Schweitzer, S. Stock, V. M. Passegger, T. Trifonov, P. J. Amado, D. Baker, P. T. Boyd, C. Cadieux, D. Charbonneau, K. A. Collins, R. Doyon, S. Dreizler, N. Espinoza, G. Furesz, E. Furlan, K. Hesse, S. B. Howell, J. M. Jenkins, R. C. Kidwell, D. W. Latham, K. K. McLeod, D. Montes, J. C. Morales, T. O'Dwyer, E. Palle, S. Pedraz, A. Reiners, I Ribas, S. N. Quinn, C. Schnaible, S. Seager, B. Skinner, J. C. Smith, R. P. Schwarz, A. Shporer, R. Vanderspek, J. N. Winn
Summary: The discovery of two super-Earth candidates orbiting the nearby dwarf star TOI-1238 was confirmed using combined photometric and spectroscopic analysis. The planets have unique properties and characteristics that contribute to our understanding of planetary systems and their formation and evolution.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. Maldonado, A. Petralia, M. Damasso, M. Pinamonti, G. Scandariato, E. Gonzalez-Alvarez, L. Affer, G. Micela, A. F. Lanza, G. Leto, E. Poretti, A. Sozzetti, M. Perger, P. Giacobbe, R. Zanmar Sanchez, A. Maggio, J. I. Gonzalez Hernandez, R. Rebolo, I Ribas, A. Suarez-Mascareno, B. Toledo-Padron, A. Bignamini, E. Molinari, E. Covino, R. Claudi, S. Desidera, E. Herrero, J. C. Morales, I Pagano, G. Piotto
Summary: The study analyzed 174 HARPS-N spectroscopic observations of the M0.5V-type star GJ 9689 taken over the past seven years. Two periodic signals in the radial velocity time series were identified, with periods of 18.27 and 39.31 days. The 18.27 day signal was confirmed to be a genuine Keplerian signal corresponding to the newly discovered planet GJ 9689 b with an orbital period of 18.27 days and a minimum mass of 9.65 Jupiter masses.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
C. Bergmann, M. I. Jones, J. Zhao, A. J. Mustill, R. Brahm, P. Torres, R. A. Wittenmyer, F. Gunn, K. R. Pollard, A. Zapata, L. Vanzi, Songhu Wang
Summary: This study presents 63 new multi-site radial velocity measurements of the K1III giant HD 76920, confirming the highly eccentric nature of the known planet orbiting it. By combining measurements from different instruments, the highly eccentric system was characterized further, showing a minimum planet mass of 3.13 M-J and an orbital period of 415.891 d. The analysis also revealed the planet's close distance to its host star at periastron and the lack of significant orbital decay in the near future.
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA
(2021)
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
Ancy Anna John, Andrew Collier Cameron, Thomas G. Wilson
Summary: This study analyzed the HARPS archival RV data of CoRoT-7 using the wavelength-domain technique scalpels to correct for stellar activity-induced spectral line-shape changes. The results showed that CoRoT-7 has three planets, including a rocky super-Earth (CoRoT-7b) and two non-transiting planets (CoRoT-7c and CoRoT-7d) structurally similar to Uranus and Neptune.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
U. Simola, A. Bonfanti, X. Dumusque, J. Cisewski-Kehe, S. Kaski, J. Corander
Summary: This paper presents an approach using change point detection algorithms to address the interference of stellar activity in radial velocity measurements for detecting exoplanets. Experimental results show that applying corrections based on this method significantly reduces residuals in RV time series, leading to an improved detection limit for exoplanets.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
K. Al Moulla, X. Dumusque, P. Figueira, G. Lo Curto, N. C. Santos, F. Wildi
Summary: By analyzing solar data, this study investigates the properties of stellar signals on different timescales and successfully recreates the radial velocity contribution of each signal component. This provides a foundation for studying the overlapping issue between planetary-induced radial velocity signals and stellar activity signals.
ASTRONOMY & ASTROPHYSICS
(2023)
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
R. Carrera, L. Casamiquela, J. Carbajo-Hijarrubia, L. Balaguer-Nunez, C. Jordi, M. Romero-Gomez, S. Blanco-Cuaresma, T. Cantat-Gaudin, J. Lillo-Box, E. Masana, E. Pancino
Summary: This study utilized high-resolution spectra to determine the radial velocities of 336 stars and analyze the membership of 51 open clusters. The radial velocities of five clusters were determined for the first time. The kinematics and orbits of the observed clusters were studied using radial velocities, proper motions, distances, and ages.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
S. Zuniga-Fernandez, A. Bayo, P. Elliott, C. Zamora, G. Corvalan, X. Haubois, J. M. Corral-Santana, J. Olofsson, N. Huelamo, M. F. Sterzik, C. A. O. Torres, G. R. Quast, C. H. F. Melo
Summary: Our study identified 68 spectroscopic binary (SB) candidates from a sample of 410 objects, suggesting a higher SB fraction in the youngest associations. The results are crucial for revising membership in young stellar associations and could indicate a non-universal multiplicity among SACY associations.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Multidisciplinary Sciences
T. Trifonov, J. A. Caballero, J. C. Morales, A. Seifahrt, I. Ribas, A. Reiners, J. L. Bean, R. Luque, H. Parviainen, E. Palle, S. Stock, M. Zechmeister, P. J. Amado, G. Anglada-Escude, M. Azzaro, T. Barclay, V. J. S. Bejar, P. Bluhm, N. Casasayas-Barris, C. Cifuentes, K. A. Collins, K. I. Collins, M. Cortes-Contreras, J. de Leon, S. Dreizler, C. D. Dressing, E. Esparza-Borges, N. Espinoza, M. Fausnaugh, A. Fukui, A. P. Hatzes, C. Hellier, Th. Henning, C. E. Henze, E. Herrero, S. V. Jeffers, J. M. Jenkins, E. L. N. Jensen, A. Kaminski, D. Kasper, D. Kossakowski, M. Kuerster, M. Lafarga, D. W. Latham, A. W. Mann, K. Molaverdikhani, D. Montes, B. T. Montet, F. Murgas, N. Narita, M. Oshagh, V. M. Passegger, D. Pollacco, S. N. Quinn, A. Quirrenbach, G. R. Ricker, C. Rodriguez Lopez, J. Sanz-Forcada, R. P. Schwarz, A. Schweitzer, S. Seager, A. Shporer, M. Stangret, J. Sturmer, T. G. Tan, P. Tenenbaum, J. D. Twicken, R. Vanderspek, J. N. Winn
Summary: A rocky exoplanet, Gliese 486 b, with a short orbital period and similar physical properties to Earth, has been discovered orbiting the nearby red dwarf star Gliese 486, making it suitable for emission and transit spectroscopy studies.
Article
Astronomy & Astrophysics
M. G. Soto, G. Anglada-Escude, S. Dreizler, K. Molaverdikhani, J. Kemmer, C. Rodriguez-Lopez, J. Lillo-Box, E. Palle, N. Espinoza, J. A. Caballero, A. Quirrenbach, I. Ribas, A. Reiners, N. Narita, T. Hirano, P. J. Amado, V. J. S. Bejar, P. Bluhm, C. J. Burke, D. A. Caldwell, D. Charbonneau, R. Cloutier, K. A. Collins, M. Cortes-Contreras, E. Girardin, P. Guerra, H. Harakawa, A. P. Hatzes, J. Irwin, J. M. Jenkins, E. Jensen, K. Kawauchi, T. Kotani, T. Kudo, M. Kunimoto, M. Kuzuhara, D. W. Latham, D. Montes, J. C. Morales, M. Mori, R. P. Nelson, M. Omiya, S. Pedraz, V. M. Passegger, B. V. Rackham, A. Rudat, J. E. Schlieder, P. Schoefer, A. Schweitzer, A. Selezneva, C. Stockdale, M. Tamura, T. Trifonov, R. Vanderspek, D. Watanabe
Summary: The study reports the discovery of a transiting super-Earth planet orbiting LHS 1478, indicating it may be a rocky exoplanet. Although too hot to sustain liquid water, the planet presents favorable conditions for atmospheric characterization based on upcoming spectroscopic measurements.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Cointepas, J. M. Almenara, X. Bonfils, F. Bouchy, N. Astudillo-Defru, F. Murgas, J. F. Otegi, A. Wyttenbach, D. R. Anderson, E. Artigau, B. L. Canto Martins, D. Charbonneau, K. A. Collins, K. Collins, J-J Correia, S. Curaba, A. Delboulbe, X. Delfosse, R. F. Diaz, C. Dorn, R. Doyon, P. Feautrier, P. Figueira, T. Forveille, G. Gaisne, T. Gan, L. Gluck, R. Helled, C. Hellier, L. Jocou, P. Kern, S. Lafrasse, N. Law, I. C. Leao, C. Lovis, Y. Magnard, A. W. Mann, D. Maurel, J. R. de Medeiros, C. Melo, T. Moulin, F. Pepe, P. Rabou, S. Rochat, D. R. Rodriguez, A. Roux, N. C. Santos, D. Segransan, E. Stadler, E. B. Ting, J. D. Twicken, S. Udry, W. C. Waalkes, R. G. West, A. Wunsche, C. Ziegler, G. Ricker, R. Vanderspek, D. W. Latham, S. Seager, J. Winn, J. M. Jenkins
Summary: A new sub-Neptune planet TOI-269 close to the transition between super-Earths and sub-Neptunes has been confirmed, with high eccentricity and potential interactions leading to its current orbit. The system, with a few Gyr old star, does not display signs of being dynamically young. Further characterization of TOI-269 b's atmosphere through transmission spectroscopy could provide valuable insights into comparing it to other sub-Neptunes.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
P. Bluhm, E. Palle, K. Molaverdikhani, J. Kemmer, A. P. Hatzes, D. Kossakowski, S. Stock, J. A. Caballero, J. Lillo-Box, V. J. S. Bejar, M. G. Soto, P. J. Amado, P. Brown, C. Cadieux, R. Cloutier, K. A. Collins, K. Collins, M. Cortes-Contreras, R. Doyon, S. Dreizler, N. Espinoza, A. Fukui, E. Gonzalez-Alvarez, Th Henning, K. Horne, S. Jeffers, J. M. Jenkins, E. L. N. Jensen, A. Kaminski, J. F. Kielkopf, N. Kusakabe, M. Kurster, D. Lafreniere, R. Luque, F. Murgas, D. Montes, J. C. Morales, N. Narita, V. M. Passegger, A. Quirrenbach, P. Schofer, S. Reffert, A. Reiners, I Ribas, G. R. Ricker, S. Seager, A. Schweitzer, R. P. Schwarz, M. Tamura, T. Trifonov, R. Vanderspek, J. Winn, M. Zechmeister, M. R. Zapatero Osorio
Summary: TOI-1685 b is the least dense ultra-short-period planet around an M dwarf known to date and one of the hottest transiting super-Earth planets with accurate dynamical mass measurements, making it particularly attractive for thermal emission spectroscopy. We also report with moderate evidence an additional non-transiting planet candidate in the system, TOI-1685 [c], with an orbital period of P-c = 9.02(-0.12)(+0.10) d.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
F. Murgas, N. Astudillo-Defru, X. Bonfils, I Crossfield, J. M. Almenara, J. Livingston, K. G. Stassun, J. Korth, J. Orell-Miquel, G. Morello, J. D. Eastman, J. J. Lissauer, S. R. Kane, F. Y. Morales, M. W. Werner, V Gorjian, B. Benneke, D. Dragomir, E. C. Matthews, S. B. Howell, D. Ciardi, E. Gonzales, R. Matson, C. Beichman, J. Schlieder, K. A. Collins, K. Collins, E. L. N. Jensen, P. Evans, F. J. Pozuelos, M. Gillon, E. Jehin, K. Barkaoui, E. Artigau, F. Bouchy, D. Charbonneau, X. Delfosse, R. F. Diaz, R. Doyon, P. Figueira, T. Forveille, C. Lovis, C. Melo, G. Gaisne, F. Pepe, N. C. Santos, D. Segransan, S. Udry, R. F. Goeke, A. M. Levine, E. Quintana, N. M. Guerrero, I Mireles, D. A. Caldwell, P. Tenenbaum, C. E. Brasseur, G. Ricker, R. Vanderspek, D. W. Latham, S. Seager, J. Winn, J. M. Jenkins
Summary: This article confirms and characterizes the planetary nature of the transiting planet candidate TOI-674b using various observational methods. TOI-674b is identified as a low-density super-Neptune orbiting a nearby M dwarf in the Neptunian desert. It is a promising target for atmospheric characterization with the James Webb Space Telescope.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
M. Baratella, V D'Orazi, V Sheminova, L. Spina, G. Carraro, R. Gratton, L. Magrini, S. Randich, M. Lugaro, M. Pignatari, D. Romano, K. Biazzo, A. Bragaglia, G. Casali, S. Desidera, A. Frasca, G. de Silva, C. Melo, M. Van der Swaelmen, G. Tautvaisiene, F. M. Jimenez-Esteban, G. Gilmore, T. Bensby, R. Smiljanic, A. Bayo, E. Franciosini, A. Gonneau, A. Hourihane, P. Jofre, L. Monaco, L. Morbidelli, G. Sacco, L. Sbordone, C. Worley, S. Zaggia
Summary: This study focuses on the chemical compositions of young open clusters, finding anomalies such as sub-solar iron content and super-solar abundances of certain species. The research confirms super-solar values for barium in young clusters, while copper levels remain similar to solar values. The study suggests that elements like strontium, zirconium, lanthanum, and cerium may serve as better tracers of s-process in young clusters, and calls for further observations to address the Ba puzzle.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
D. Kossakowski, J. Kemmer, P. Bluhm, S. Stock, J. A. Caballero, V. J. S. Bejar, C. Cardona Guillen, N. Lodieu, K. A. Collins, M. Oshagh, M. Schlecker, N. Espinoza, E. Palle, Th Henning, L. Kreidberg, M. Kuerster, P. J. Amado, D. R. Anderson, J. C. Morales, S. Cartwright, D. Charbonneau, P. Chaturvedi, C. Cifuentes, D. M. Conti, M. Cortes-Contreras, S. Dreizler, D. Galadi-Enriquez, P. Guerra, R. Hart, C. Hellier, C. Henze, E. Herrero, S. Jeffers, J. M. Jenkins, E. L. N. Jensen, A. Kaminski, J. F. Kielkopf, M. Kunimoto, M. Lafarga, D. W. Latham, J. Lillo-Box, R. Luque, K. Molaverdikhani, D. Montes, G. Morello, E. H. Morgan, G. Nowak, A. Pavlov, M. Perger, E. Quintana, A. Quirrenbach, S. Reffert, A. Reiners, G. Ricker, I Ribas, C. Rodriguez Lopez, M. R. Zapatero Osorio, S. Seager, P. Schoefer, A. Schweitzer, T. Trifonov, S. Vanaverbeke, R. Vanderspek, R. West, J. Winn, M. Zechmeister
Summary: This study presents the discovery of a transiting mini-Neptune around TOI-1201, with the planet's existence confirmed through radial velocity measurements. The transiting planet is identified as an excellent target for atmosphere characterization.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
P. Chaturvedi, P. Bluhm, E. Nagel, A. P. Hatzes, G. Morello, M. Brady, J. Korth, K. Molaverdikhani, D. Kossakowski, J. A. Caballero, E. W. Guenther, E. Palle, N. Espinoza, A. Seifahrt, N. Lodieu, C. Cifuentes, E. Furlan, P. J. Amado, T. Barclay, J. Bean, V. J. S. Bejar, G. Bergond, A. W. Boyle, D. Ciardi, K. A. Collins, K. Collins, E. Esparza-Borges, A. Fukui, C. L. Gnilka, R. Goeke, P. Guerra, Th Henning, E. Herrero, S. B. Howell, S. Jeffers, J. M. Jenkins, E. L. N. Jensen, D. Kasper, T. Kodama, D. W. Latham, M. J. Lopez-Gonzalez, R. Luque, D. Montes, J. C. Morales, M. Mori, F. Murgas, N. Narita, G. Nowak, H. Parviainen, V. M. Passegger, A. Quirrenbach, S. Reffert, A. Reiners, I Ribas, G. R. Ricker, E. Rodriguez, C. Rodriguez-Lopez, M. Schlecker, R. P. Schwarz, A. Schweitzer, S. Seager, G. Stefansson, C. Stockdale, L. Tal-Or, J. D. Twicken, S. Vanaverbeke, G. Wang, D. Watanabe, J. N. Winn, M. Zechmeister
Summary: We report the discovery and characterization of two small transiting planets orbiting the bright M3.0V star TOI-1468 (LSPM J0106+1913). Through precise radial velocity measurements and ground-based transit photometry, we confirm the planetary nature of these planets. The significance of this system lies in the fact that these planets are located on opposite sides of the radius valley, providing insight into the formation and evolution scenarios of small planets around M dwarfs.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Zewen Jiang, Wei Wang, Guo Chen, Fei Yan, Heather M. Cegla, Patricio Rojo, Yaqing Shi, Qinglin Ouyang, Meng Zhai, Yujuan Liu, Fei Zhao, Yuqin Chen
Summary: Transit spectroscopy is a commonly used technique to study the atmosphere of exoplanets. In this study, the transmission spectra of WASP-85Ab were obtained and Ha, Ca II, and Li I absorptions were tentatively detected.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Joseph Harrington, Michael D. D. Himes, Patricio E. E. Cubillos, Jasmina Blecic, Patricio M. M. Rojo, Ryan C. C. Challener, Nate B. B. Lust, M. Oliver Bowman, Sarah D. D. Blumenthal, Ian Dobbs-Dixon, Andrew S. D. Foster, Austin J. J. Foster, M. R. Green, Thomas J. J. Loredo, Kathleen J. J. McIntyre, Madison M. M. Stemm, David C. C. Wright
Summary: This paper presents an open-source Bayesian Atmospheric Radiative Transfer (BART) retrieval package, which can estimate and determine the thermal profile and chemical abundances of an atmosphere from observations. The package consists of several components, including a parallel Bayesian sampler, a radiative-transfer model, a code for calculating abundances, and a test suite. The authors invite the community to use and improve these tools and provide an application example using BART for exoplanet data.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
Erin Redwing, Imke de Pater, Statia Luszcz-Cook, Katherine de Kleer, Arielle Moullet, Patricio M. Rojo
Summary: We conducted the first comprehensive study on NaCl and KCl gases in Io's atmosphere, investigating their characteristics and inferring properties of Io's volcanoes and subsurface magma chambers. The spatial distribution and high temperatures suggest a volcanic origin, with a higher preference for outgassing KCl over NaCl.
PLANETARY SCIENCE JOURNAL
(2022)
Article
Astronomy & Astrophysics
Fiona Nichols-Fleming, Paul Corlies, Alexander G. Hayes, Mate Adamkovics, Patricio Rojo, Sebastien Rodriguez, Elizabeth P. Turtle, Juan M. Lora, Jason M. Soderblom
Summary: Recent observations of Titan using near-infrared instruments have shown significant subseasonal variations in its atmosphere, with haze opacity decreasing in some regions and increasing in others over short time periods. These rapid changes suggest dynamic processes at play in the distribution of hazes in Titan's atmosphere, in addition to the known seasonal variations.
PLANETARY SCIENCE JOURNAL
(2021)
Article
Astronomy & Astrophysics
E. T. Whelan, I. Pascucci, U. Gorti, S. Edwards, R. D. Alexander, M. F. Sterzik, C. Melo
Summary: Spectroastrometry is used to study the low-velocity component (LVC) of optical forbidden emission from T Tauri stars RU Lupi and AS 205 N. It is found that the LVC of RU Lupi may trace a wide-angled MHD disk wind, while AS 205 N exhibits a complex outflow system.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Ryan Cloutier, Jason D. Eastman, Joseph E. Rodriguez, Nicola Astudillo-Defru, Xavier Bonfils, Annelies Mortier, Christopher A. Watson, Manu Stalport, Matteo Pinamonti, Florian Lienhard, Avet Harutyunyan, Mario Damasso, David W. Latham, Karen A. Collins, Robert Massey, Jonathan Irwin, Jennifer G. Winters, David Charbonneau, Carl Ziegler, Elisabeth Matthews, Ian J. M. Crossfield, Laura Kreidberg, Samuel N. Quinn, George Ricker, Roland Vanderspek, Sara Seager, Joshua Winn, Jon M. Jenkins, Michael Vezie, Stephane Udry, Joseph D. Twicken, Peter Tenenbaum, Alessandro Sozzetti, Damien Segransan, Joshua E. Schlieder, Dimitar Sasselov, Nuno C. Santos, Ken Rice, Benjamin Rackham, Ennio Poretti, Giampaolo Piotto, David Phillips, Francesco Pepe, Emilio Molinari, Lucile Mignon, Giuseppina Micela, Claudio Melo, Jose R. de Medeiros, Michel Mayor, Rachel A. Matson, Aldo F. Martinez Fiorenzano, Andrew W. Mann, Antonio Magazzu, Christophe Lovis, Mercedes Lopez-Morales, Eric Lopez, Jack J. Lissauer, Sebastien Lepine, Nicholas Law, John F. Kielkopf, John A. Johnson, Eric L. N. Jensen, Steve B. Howell, Erica Gonzales, Adriano Ghedina, Thierry Forveille, Pedro Figueira, Xavier Dumusque, Courtney D. Dressing, Rene Doyon, Rodrigo F. Diaz, Luca Di Fabrizio, Xavier Delfosse, Rosario Cosentino, Dennis M. Conti, Kevin Collins, Andrew Collier Cameron, David Ciardi, Douglas A. Caldwell, Christopher Burke, Lars Buchhave, Cesar Briceno, Patricia Boyd, Francois Bouchy, Charles Beichman, Etienne Artigau, Jose M. Almenara
ASTRONOMICAL JOURNAL
(2020)