Article
Astronomy & Astrophysics
Tianjun Gan, Zitao Lin, Sharon Xuesong Wang, Shude Mao, Pascal Fouque, Jiahao Fan, Megan Bedell, Keivan G. Stassun, Steven Giacalone, Akihiko Fukui, Felipe Murgas, David R. Ciardi, Steve B. Howell, Karen A. Collins, Avi Shporer, Luc Arnold, Thomas Barclay, David Charbonneau, Jessie Christiansen, Ian J. M. Crossfield, Courtney D. Dressing, Ashley Elliott, Emma Esparza-Borges, Phil Evans, Crystal L. Gnilka, Erica J. Gonzales, Andrew W. Howard, Keisuke Isogai, Kiyoe Kawauchi, Seiya Kurita, Beibei Liu, John H. Livingston, Rachel A. Matson, Norio Narita, Enric Palle, Hannu Parviainen, Benjamin Rackham, David R. Rodriguez, Mark Rose, Alexander Rudat, Joshua E. Schlieder, Nicholas J. Scott, Michael Vezie, George R. Ricker, Roland Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins
Summary: We report the discovery of TOI-530b, a Saturn-like planet orbiting an M0.5V dwarf star. Through various measurements and analysis, we confirmed the nature of this planet and its relationship with the host star. The findings contribute to the understanding of planet formation and migration around M-type stars.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Christopher E. O'Connor, Bin Liu, Dong Lai
Summary: This study investigates the possible origin of the transiting giant planet WD1856+534 b around a white dwarf through high-eccentricity migration driven by the Lidov-Kozai effect. It demonstrates the significance of secular inclination resonance in the system's overall architecture and the role of other factors in influencing planet migration.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Kevin T. Hayakawa, Bradley M. S. Hansen
Summary: Irregular satellites of the Solar system have undergone collisional evolution, resulting in the formation of dusty collisional debris. This paper examines the debris discs produced by extrasolar analogues of this process and finds that they can reproduce the observed radial distribution of dust in narrow dust rings. The formation of circumstellar dust rings is driven by radiation pressure, which liberates dust grains from the planetary Hill sphere.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Claire Baxter, Jean-Michel Desert, Shang-Min Tsai, Kamen O. Todorov, Jacob L. Bean, Drake Deming, Vivien Parmentier, Jonathan J. Fortney, Michael Line, Daniel Thorngren, Raymond T. Pierrehumbert, Adam Burrows, Adam P. Showman
Summary: This large atmospheric study of gas giant exoplanets using infrared transmission photometry with Spitzer/IRAC reveals significant differences in atmospheric properties between different temperature planets. The cooler planets show a lack of methane while the hotter planets exhibit methane in their upper atmospheres. Additionally, mid-temperate and ultra-hot planets show a significant scatter in their transmission signatures, indicating increased atmospheric diversity without higher metallicities.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Tiago F. L. L. Pinheiro, Rafael Sfair
Summary: The young star PDS110 in the Ori OB1a association experienced two similar eclipses in 2008 and 2011, possibly caused by an unseen giant planet with a ring system. Through numerical simulations, the mass, eccentricity, size, and inclination of this planet's ring were constrained, ruling out configurations that did not match observations. The preferred solution suggests the ring has an inclination of less than 60 degrees, a radius between 0.1 and 0.2 au, with the planet being more massive than 35 M-Jup and having a low eccentricity (<0.05).
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Gijs D. Mulders, Joanna Drazkowska, Nienke van der Marel, Fred J. Ciesla, Ilaria Pascucci
Summary: This study proposes a planet formation scenario to explain the elevated occurrence rates of transiting planets around M dwarfs compared to Sun-like stars, using a pebble drift and accretion model. The research finds an anticorrelation between the masses of hot super-Earths and cold giant planets, with a higher fraction of hot super-Earths forming around lower-mass stars, matching exoplanet occurrence rates from Kepler. The pebble accretion hypothesis predicts a decrease in occurrence rates of super-Earths near the substellar boundary for M dwarfs like Trappist-1.
ASTROPHYSICAL JOURNAL LETTERS
(2021)
Article
Astronomy & Astrophysics
J. Subjak, M. Endl, P. Chaturvedi, R. Karjalainen, W. D. Cochran, M. Esposito, D. Gandolfi, K. W. F. Lam, K. Stassun, J. Zak, N. Lodieu, H. M. J. Boffin, P. J. MacQueen, A. Hatzes, E. W. Guenther, I. Georgieva, S. Grziwa, H. Schmerling, M. Skarka, M. Blazek, M. Karjalainen, M. Spokova, H. Isaacson, A. W. Howard, C. J. Burke, V. Van Eylen, B. Falk, M. Fridlund, E. Goffo, J. M. Jenkins, J. Korth, J. J. Lissauer, J. H. Livingston, R. Luque, A. Muresan, H. P. Osborn, E. Palle, C. M. Persson, S. Redfield, G. R. Ricker, S. Seager, L. M. Serrano, A. M. S. Smith, P. Kabath
Summary: We report the discovery of TOI-1268b, a young Saturn-mass planet, from the TESS space mission. Its orbital period, host star parameters, and planet's mass and radius are measured, making it an ideal candidate for studying young planets and for transmission spectroscopy studies.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
O. D. S. Demangeon, M. R. Zapatero Osorio, Y. Alibert, S. C. C. Barros, V. Adibekyan, H. M. Tabernero, A. Antoniadis-Karnavas, J. D. Camacho, A. Suarez Mascareno, M. Oshagh, G. Micela, S. G. Sousa, C. Lovis, F. A. Pepe, R. Rebolo, S. Cristiani, N. C. Santos, R. Allart, C. Allende Prieto, D. Bossini, F. Bouchy, A. Cabral, M. Damasso, P. Di Marcantonio, V. D'Odorico, D. Ehrenreich, J. Faria, P. Figueira, R. Genova Santos, J. Haldemann, N. Hara, J. I. Gonzalez Hernandez, B. Lavie, J. Lillo-Box, G. Lo Curto, C. J. A. P. Martins, D. Megevand, A. Mehner, P. Molaro, N. J. Nunes, E. Palle, L. Pasquini, E. Poretti, A. Sozzetti, S. Udry
Summary: The latest radial velocity instruments have enabled the detection of planets with increasingly lower mass, with the report of the lowest mass planet L 98-59 b and the discovery of additional nontransiting planets. This system may serve as a cornerstone for comparative exoplanetology of terrestrial planets.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Zirui Chen, David Kipping
Summary: The growing number of circumbinary planets discovered suggests that planets can form under a wide range of conditions in the universe. Transiting circumbinary planets, which have been widely observed, provide valuable insights. This study investigates the possibility of misaligned transiting planets and examines the influence of missing data on their detection. The results show that the transit sequences contain important information about the inclination distribution and can be used for initial analysis of misaligned circumbinary planets.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Review
Environmental Sciences
Yamila Miguel, Allona Vazan
Summary: The giant planets provide key insights into the formation history of the solar system and serve as natural laboratories for studying elements under extreme conditions. Recent missions like Juno and Cassini have greatly advanced our understanding of their interiors, revolutionizing our knowledge with accurate gravity data, atmospheric measurements, and magnetic field data. Coupled with laboratory experiments and statistical analysis, we can now explore the diverse conditions shaping their interior structures.
Article
Astronomy & Astrophysics
Ravit Helled
Summary: The formation history of giant planets, both inside and outside the Solar System, is still unknown. The occurrence of runaway gas accretion at planetary masses greater than Saturn's can explain various phenomena, such as the differences between Jupiter and Saturn's metallicities and internal structures, the transitions in the mass-radius relations of observed exoplanets, and the high metallicity of intermediate-mass exoplanets. However, the exact formation history and birth environment of the planets in our Solar System are still not well constrained.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Barmentloo, C. Dik, M. A. Kenworthy, E. E. Mamajek, F. -J. Hambsch, D. E. Reichart, J. E. Rodriguez, D. M. van Dam
Summary: This study aims to model and remove the rotational modulation of the J1407 light curve and search for additional transit signatures of substellar companions orbiting around J1407. Through combining photometry data from multiple observatories and using transit least squares (TLS) analysis, we identified the activity cycle of J1407 but did not find any plausible periodic eclipses in the light curve.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Pavol Gajdos, Martin Vanko
Summary: In this paper, we conducted an initial study on the dynamics and stability of 178 multiplanetary systems listed in the NASA Exoplanet Archive. The Mean Exponential Growth factor of Nearby Orbits (MEGNO) indicator was used to distinguish between chaotic and regular systems. Nearly three-quarters of the systems were found to be long-term stable, while only 45 exhibited chaotic behavior. We investigated the influence of the number of planets and their parameters on system stability, and compared the effectiveness of MEGNO indicator and machine-learning algorithm SPOCK.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
J. W. Skinner, J. Y-K Cho
Summary: The study indicates that modons play a major role in the atmospheres of tidally synchronized extrasolar planets, altering flows and leading to recognizable weather patterns. On synchronized planets, large modons reach planetary-scale and exhibit quasi-periodic life-cycles.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Bradley M. S. Hansen
Summary: Moons orbiting exoplanets experience accelerated tidal evolution and may merge or become unstable. Atmospheric tides can change the outcome from merger to escape in some cases. Unbound moons are likely to collide with their parent planet, releasing dust that can be observed as transient clouds. Late collisions with returning moons may sterilize habitable planets.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Sydney Vach, Samuel N. Quinn, Andrew Vanderburg, Stephen R. Kane, Karen A. Collins, Adam L. Kraus, George Zhou, Amber A. Medina, Richard P. Schwarz, Kevin Collins, Dennis M. Conti, Chris Stockdale, Bob Massey, Olga Suarez, Tristan Guillot, Djamel Mekarnia, Lyu Abe, Georgina Dransfield, Nicolas Crouzet, Amaury H. M. J. Triaud, Francois-Xavier Schmider, Abelkrim Agabi, Marco Buttu, Coel Hellier, Elise Furlan, Crystal L. Gnilka, Steve B. Howell, Carl Ziegler, Cesar Briceno, Nicholas Law, Andrew W. Mann, Alexander Rudat, Knicole D. Colon, Mark E. Rose, Michelle Kunimoto, Maximilian N. Gunther, David Charbonneau, David R. Ciardi, George R. Ricker, Roland K. Vanderspek, David W. Latham, Sara Seager, Joshua N. Winn, Jon M. Jenkins
Summary: NASA's TESS mission is able to detect the brightest and rarest types of transiting planetary systems, including young planets. In this study, a young multiplanet system orbiting the bright K4.5V star TOI-712 is discovered, consisting of three transiting mini-Neptunes and an Earth-sized candidate planet.
ASTRONOMICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Masanobu Kunitomo, Tristan Guillot, Gael Buldgen
Summary: Solar evolutionary models have difficulty in consistently reproducing spectroscopic, helioseismic, and neutrino constraints, known as the solar modeling problem. However, including a realistic planet formation scenario in the solar evolutionary models can increase core metallicity and improve the accuracy of neutrino flux measurements during the initial stages of the Solar System formation.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Multidisciplinary Sciences
Daniele Durante, Tristan Guillot, Luciano Iess, David J. Stevenson, Christopher R. Mankovich, Steve Markham, Eli Galanti, Yohai Kaspi, Marco Zannoni, Luis Gomez Casajus, Giacomo Lari, Marzia Parisi, Dustin R. Buccino, Ryan S. Park, Scott J. Bolton
Summary: The Juno spacecraft has provided new evidence of the gravity field features of Jupiter, which are perturbed by the planet's normal modes. These findings could potentially lead to further exploration of the gas giant's interior structure through measurements of time-variable gravity or onboard observations of normal modes.
NATURE COMMUNICATIONS
(2022)
Article
Geochemistry & Geophysics
K. M. Moore, A. Barik, S. Stanley, D. J. Stevenson, N. Nettelmann, R. Helled, T. Guillot, B. Militzer, S. Bolton
Summary: Understanding the interior structure of Jupiter is crucial for studying planetary accretion models. Recent findings suggest the presence of stable stratification in the form of an upper layer and a potentially stratified dilute core within the planet. However, the equations of state for hydrogen and helium remain uncertain. In this study, high-resolution numerical magnetohydrodynamic simulations of Jupiter's magnetic field are used to constrain the extent of stable stratification. The results indicate that an upper stably stratified layer helps explain Jupiter's magnetic field and winds, while an entirely stably stratified dilute core yields worse fits. These findings suggest that alternative modalities may be required if a dilute core is present.
JOURNAL OF GEOPHYSICAL RESEARCH-PLANETS
(2022)
Article
Astronomy & Astrophysics
J. Korth, D. Gandolfi, J. Subjak, S. Howard, S. Ataiee, K. A. Collins, S. N. Quinn, A. J. Mustill, T. Guillot, N. Lodieu, A. M. S. Smith, M. Esposito, F. Rodler, A. Muresan, L. Abe, S. H. Albrecht, A. Alqasim, K. Barkaoui, P. G. Beck, C. J. Burke, R. P. Butler, D. M. Conti, K. I. Collins, J. D. Crane, F. Dai, H. J. Deeg, P. Evans, S. Grziwa, A. P. Hatzes, T. Hirano, K. Horne, C. X. Huang, J. M. Jenkins, P. Kabath, J. F. Kielkopf, E. Knudstrup, D. W. Latham, J. Livingston, R. Luque, S. Mathur, F. Murgas, H. L. M. Osborne, E. Palle, C. M. Persson, J. E. Rodriguez, M. Rose, P. Rowden, R. P. Schwarz, S. Seager, L. M. Serrano, L. Sha, S. A. Shectman, A. Shporer, G. Srdoc, C. Stockdale, T. -G. Tan, J. K. Teske, V. Van Eylen, A. Vanderburg, R. Vanderspek, S. X. Wang, J. N. Winn
Summary: The TOI-1130 planetary system contains a gas giant planet, TOI-1130 c, and an inner Neptune-sized planet, TOI-1130 b, both of which have small eccentric orbits in a 2:1 resonant configuration. The masses and radii of these planets have been determined through photodynamical modeling and spectroscopic analysis. Additionally, a linear RV trend suggests the possible presence of an outer massive companion.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Howard, T. Guillot
Summary: This paper proposes a simple method to consider the interactions between hydrogen and helium in the interior and evolution models of giant planets. It is found that non-ideal mixing effects have significant impacts on the interior models of giant planets and the mass-radius relation of exoplanets. The study shows that the density and entropy can vary up to 15% when non-ideal mixing is considered.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
S. Howard, T. Guillot, M. Bazot, Y. Miguel, D. J. Stevenson, E. Galanti, Y. Kaspi, W. B. Hubbard, B. Militzer, R. Helled, N. Nettelmann, B. Idini, S. Bolton
Summary: In this study, the impact of equations of state on the interior models of Jupiter was investigated. The results showed that the equations of state have a crucial effect on the inferred structure and composition of Jupiter. Further research on the behavior of hydrogen-helium mixtures will help constrain the interior and origin of the planet.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Geosciences, Multidisciplinary
E. Galanti, Y. Kaspi, T. Guillot
Summary: The shape of Jupiter and Saturn is primarily determined by their rotation rate and interior density distribution. Zonal winds also affect their shape, causing an anomaly at low latitudes. However, uncertainties in cloud-level wind and polar radius lead to uncertainties in shape of the same order of magnitude. The Juno and Cassini missions provide more accurate gravity measurements, helping to better constrain the uncertainty in wind structure.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
Yury S. Aglyamov, Jonathan Lunine, Sushil Atreya, Tristan Guillot, Heidi N. Becker, Steven Levin, Scott J. Bolton
Summary: Lightning on giant planets has been observed at various altitudes, including below the cloud base and above it. Theoretical models suggest different lightning mechanisms for different planets, such as precipitation-induced lightning on Jupiter and high-pressure lightning on Uranus and Neptune. Future observations are needed to understand the nature of lightning on these planets.
PLANETARY SCIENCE JOURNAL
(2023)
Article
Astronomy & Astrophysics
Melissa J. Hobson, Trifon Trifonov, Thomas Henning, Andres Jordan, Felipe Rojas, Nestor Espinoza, Rafael Brahm, Jan Eberhardt, Matias I. Jones, Djamel Mekarnia, Diana Kossakowski, Martin Schlecker, Marcelo Tala Pinto, Pascal Jose Torres Miranda, Lyu Abe, Khalid Barkaoui, Philippe Bendjoya, Francois Bouchy, Marco Buttu, Ilaria Carleo, Karen A. Collins, Knicole D. Colon, Nicolas Crouzet, Diana Dragomir, Georgina Dransfield, Thomas Gasparetto, Robert F. Goeke, Tristan Guillot, Maximilian N. Guenther, Saburo Howard, Jon M. Jenkins, Judith Korth, David W. Latham, Monika Lendl, Jack J. Lissauer, Christopher R. Mann, Ismael Mireles, George R. Ricker, Sophie Saesen, Richard P. Schwarz, S. Seager, Ramotholo Sefako, Avi Shporer, Chris Stockdale, Olga Suarez, Thiam-Guan Tan, Amaury H. M. J. Triaud, Solene Ulmer-Moll, Roland Vanderspek, Joshua N. Winn, Bill Wohler, George Zhou
Summary: This paper presents the spectroscopic confirmation and precise mass measurement of the warm giant planet TOI-199 b. The planet was first identified in TESS photometry and confirmed using ground-based and space photometry, as well as radial velocities. It is the first warm exo-Saturn with a precisely determined mass and radius. The analysis of radial velocities and transit timing variations reveals the existence of a second planet in the system.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ananyo Bhattacharya, Cheng Li, Sushil K. Atreya, Paul G. Steffes, Steven M. Levin, Scott J. Bolton, Tristan Guillot, Pranika Gupta, Andrew P. Ingersoll, Jonathan I. Lunine, Glenn S. Orton, Fabiano A. Oyafuso, J. Hunter Waite, Amadeo Bellotti, Michael H. Wong
Summary: An additional source of opacity in the deep atmosphere of Jupiter has been observed, and it cannot be explained by the absorption properties and relative abundances of ammonia and water vapor. It has been found that free electrons from the ionization of alkali metals, specifically sodium and potassium, can provide the missing opacity. If alkali metals are not responsible for the additional opacity in the MWR data, then their metallicity at 1000 bars must be even lower.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
S. N. Hasler, A. Y. Burdanov, J. de Wit, G. Dransfield, L. Abe, A. Agabi, P. Bendjoya, N. Crouzet, T. Guillot, D. Mekarnia, F. X. Schmider, O. Suarez, A. H. M. J. Triaud
Summary: Small Solar system bodies are valuable records for understanding the formation and evolution of our Solar system. Interstellar objects can provide insights into exoplanetary system formation and planetary system evolution. This study presents the application of a framework to search for small Solar system bodies in data collected by the Antarctic Search for Transiting ExoPlanets (ASTEP) project. Known objects ranging from asteroids to comets were identified and future work will extend the pipeline to reach fainter objects.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Y. Kaspi, E. Galanti, R. S. Park, K. Duer, N. Gavriel, D. Durante, L. Iess, M. Parisi, D. R. Buccino, T. Guillot, D. J. Stevenson, S. J. Bolton
Summary: The atmospheric dynamics of Jupiter are dominated by strong zonal winds. Gravity measurements are used to determine the depth and structure of the observed winds. The new gravity measurements provide direct evidence that the flows penetrate inwards along the direction of the spin axis, confirming the cylindrical nature of the flow.
Article
Astronomy & Astrophysics
Justin M. Wittrock, Peter P. Plavchan, Bryson L. Cale, Thomas Barclay, Mathis R. Ludwig, Richard P. Schwarz, Djamel Mekarnia, Amaury H. M. J. Triaud, Lyu Abe, Olga Suarez, Tristan Guillot, Dennis M. Conti, Karen A. Collins, Ian A. Waite, John F. Kielkopf, Kevin I. Collins, Stefan Dreizler, Mohammed El Mufti, Dax L. Feliz, Eric Gaidos, Claire S. Geneser, Keith D. Horne, Stephen R. Kane, Patrick J. Lowrance, Eder Martioli, Don J. Radford, Michael A. Reefe, Veronica Roccatagliata, Avi Shporer, Keivan G. Stassun, Christopher Stockdale, Thiam-Guan Tan, Angelle M. Tanner, Laura D. Vega
Summary: A candidate planet, AU Mic d, has been identified in the AU Mic planetary system. The planet has multiple potential orbital periods near resonances with AU Mic b and c. It has a similar mass to Earth and, if confirmed, would be the first known Earth-mass planet orbiting a young star.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Burkhard Militzer, William B. Hubbard, Sean Wahl, Jonathan I. Lunine, Eli Galanti, Yohai Kaspi, Yamila Miguel, Tristan Guillot, Kimberly M. Moore, Marzia Parisi, John E. P. Connerney, Ravid Helled, Hao Cao, Christopher Mankovich, David J. Stevenson, Ryan S. Park, Mike Wong, Sushil K. Atreya, John Anderson, Scott J. Bolton
Summary: The Juno spacecraft's measurement of Jupiter's gravity field and its harmonics has provided new insights into the planet's interior structure. The study suggests that the small values of certain harmonics can be explained by assuming the presence of a dilute core of heavy elements distributed throughout the planet, along with a new equation of state and wind profiles.
PLANETARY SCIENCE JOURNAL
(2022)
