Results 21 to 30 of about 226 (101)
Prospects from TESS and Gaia to Constrain the Flatness of Planetary Systems
The Astronomical Journal, 2023 The mutual inclination between planets orbiting the same star provides key information to understand the formation and evolution of multiplanet systems.
Juan I. Espinoza-Retamal +2 more
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Observing Atmospheric Escape in Sub-Jovian Worlds with JWST
The Astronomical Journal, 2023 Hydrodynamic atmospheric escape is considered an important process that shapes the evolution of sub-Jovian exoplanets, particularly those with short orbital periods.
Leonardo A. Dos Santos +3 more
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TOI-5205b: A Short-period Jovian Planet Transiting a Mid-M Dwarf
The Astronomical Journal, 2023 We present the discovery of TOI-5205b, a transiting Jovian planet orbiting a solar metallicity M4V star, which was discovered using Transiting Exoplanet Survey Satellite photometry and then confirmed using a combination of precise radial velocities ...
Shubham Kanodia +29 more
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A JWST Transit of a Jupiter Analog. I. Constraints on the Oblateness of Kepler-167 e
The Astronomical JournalIn 2024 October, JWST observed a transit of Kepler-167 e, a Jupiter-analog planet on a 1000+ day orbit. These observations, recorded over a long baseline of nearly 60 hr, were designed to search for signatures of planetary oblateness and/or exomoons ...
Ben Cassese +7 more
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Small and Close-in Planets are Uncommon Around A-type Stars
The Astronomical JournalThe Kepler and K2 missions enabled robust calculations of planet occurrence rates around FGKM-type stars. However, these missions observed too few stars with earlier spectral types to tightly constrain the occurrence rates of planets orbiting hotter ...
Steven Giacalone, Courtney D. Dressing
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TOI-1859b: A 64 Day Warm Jupiter on an Eccentric and Misaligned Orbit
The Astrophysical Journal Letters, 2023 Warm Jupiters are close-in giant planets with relatively large planet–star separations (i.e., 10 < a / R _⋆ < 100). Given their weak tidal interactions with their host stars, measurements of stellar obliquity may be used to probe the initial obliquity ...
Jiayin Dong +33 more
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The Astronomical JournalThe extreme environments of transiting close-in exoplanets in highly eccentric orbits are ideal for testing exoclimate physics. Spectroscopically resolved phase curves not only allow for the characterization of their thermal response to irradiation ...
Bob Jacobs +12 more
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On the Exoplanet Yield of Gaia Astrometry
The Astronomical JournalWe reexamine the expected yield of Gaia astrometric planet detections using updated models for giant-planet occurrence, the local stellar population, and Gaia’s demonstrated astrometric precision. Our analysis combines a semianalytic model that clarifies
Caleb Lammers, Joshua N. Winn
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The Astronomical JournalWe have conducted a planetary radial velocity measurement of the ultrahot Jupiter WASP-121b using JWST NIRSpec phase curve data. Our analysis reveals the Doppler shift of the planetary spectral lines across the full orbit, which shifts considerably ...
David K. Sing +5 more
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A Population Synthesis Study on the Formation of Cold Jupiters from Truncated Planetesimal Disks
The Astrophysical JournalThe occurrence rate of giant planets increases with orbital period and turns over at a location that roughly corresponds to the snowline of solar-type stars.
Kangrou Guo +5 more
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