Results 1 to 10 of about 213 (136)
The Astronomical Journal, 2023 Orbital eccentricities directly trace the formation mechanisms and dynamical histories of substellar companions. Here, we study the effect of hyperpriors on the population-level eccentricity distributions inferred for the sample of directly imaged ...
Vighnesh Nagpal +5 more
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The Astronomical Journal, 2023 We confirm the planetary nature of two gas giants discovered by TESS to transit M dwarfs with stellar companions at wide separations. TOI-3984 A ( J = 11.93) is an M4 dwarf hosting a short-period (4.353326 ± 0.000005 days) gas giant ( M _p = 0.14 ± 0.03 ...
Caleb I. Cañas +32 more
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Small Planets around Cool Dwarfs: Enhanced Formation Efficiency of Super-Earths around M Dwarfs
The Astrophysical Journal Letters, 2023 Current measurements of planet population as a function of stellar mass show three seemingly contradictory signatures: close-in super-Earths are more prevalent around M dwarfs than FGK dwarfs; inner super-Earths are correlated with outer giants; and ...
Yayaati Chachan, Eve J. Lee
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Forming Gas Giants around a Range of Protostellar M-dwarfs by Gas Disk Gravitational Instability
The Astrophysical Journal, 2023 Recent discoveries of gas giant exoplanets around M-dwarfs from transiting and radial velocity surveys are difficult to explain with core-accretion models. We present here a homogeneous suite of 162 models of gravitationally unstable gaseous disks. These
Alan P. Boss, Shubham Kanodia
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The Astrophysical Journal Letters, 2023 We present the highest fidelity spectrum to date of a planetary-mass object. VHS 1256 b is a
Brittany E. Miles +110 more
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Highly Depleted Alkali Metals in Jupiter’s Deep Atmosphere
The Astrophysical Journal Letters, 2023 Water and ammonia vapors are known to be the major sources of spectral absorption at pressure levels observed by the microwave radiometer (MWR) on Juno. However, the brightness temperatures and limb darkening observed by the MWR at its longest-wavelength
Ananyo Bhattacharya +14 more
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Three Long-period Transiting Giant Planets from TESS
The Astronomical Journal, 2023 We report the discovery and orbital characterization of three new transiting warm giant planets. These systems were initially identified as presenting single-transit events in the light curves generated from the full-frame images of the Transiting ...
Rafael Brahm +54 more
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TOI-5344 b: A Saturn-like Planet Orbiting a Super-solar Metallicity M0 Dwarf
The Astronomical Journal, 2023 We confirm the planetary nature of TOI-5344 b as a transiting giant exoplanet around an M0-dwarf star. TOI-5344 b was discovered with the Transiting Exoplanet Survey Satellite photometry and confirmed with ground-based photometry (the Red Buttes ...
Te Han +21 more
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Jupiter Atmospheric Models and Outer Boundary Conditions for Giant Planet Evolutionary Calculations
The Astrophysical Journal, 2023 We present updated atmospheric tables suitable for calculating the post-formation evolution and cooling of Jupiter and Jupiter-like exoplanets. These tables are generated using a 1D radiative transfer modeling code that incorporates the latest opacities ...
Yi-Xian Chen +3 more
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The Astronomical Journal, 2022 We present an estimate of the occurrence rate of hot Jupiters (7 R _⊕ ≤ R _p ≤ 2 R _J , 0.8 ≤ P _b ≤ 10 days) around early-type M dwarfs based on stars observed by the Transiting Exoplanet Survey Satellite (TESS) during its primary mission.
Tianjun Gan +28 more
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