Results 121 to 130 of about 10,242 (205)

Investigating the Origins of Hot Neptunes from Radial Velocity Data

The Astronomical Journal
Hot Neptunes are extrasolar planets that are similar in size to Neptune in our solar system but are much closer to their host stars, completing an orbit in 10 days or less. The origin of hot Neptunes is not fully understood.
Sophie Y. Zheng
doaj   +1 more source

Two-dimensional Models of Microphysical Clouds on Hot Jupiters. I. Cloud Properties

The Astrophysical Journal
We present a new two-dimensional, bin-scheme microphysical model of cloud formation in the atmospheres of hot Jupiters that includes the effects of longitudinal gas and cloud transport.
Diana Powell, Xi Zhang
doaj   +1 more source

Exploring Warm Jupiter Migration Pathways with Eccentricities. II. Correlations with Host Star Properties and Orbital Separation

The Astronomical Journal
Warm Jupiters with orbital periods of ≈10–365 days represent a population of giant planets located well within the water ice line but beyond the region of tidal influence of their host star relevant for high-eccentricity tidal migration.
Marvin Morgan, Brendan P. Bowler, Quang H. Tran   +2 more
doaj   +1 more source

Hot Jupiters and Super-Earths

, 2016
We explore the role of dynamics in shaping planetary system multiplicities, focussing on two particular problems. (1) We propose that the lack of close-in super-Earths in hot Jupiter systems is a signature of the migration history of the hot Jupiters and helps to discriminate between different mechanisms of migration.
Mustill, Alexander James, Davies, Melvyn B, Johansen, Anders   +2 more
openaire   +2 more sources

Exoplanet Ephemerides Change Observations (ExoEcho). I. Transit Timing Analysis of 37 Exoplanets Using HST/WFC3 Data

The Astronomical Journal
The ExoEcho project is designed to study the photodynamics of exoplanets by leveraging high-precision transit timing data from ground- and space-based telescopes.
Xinyue Ma, Wenqin Wang, Zixin Zhang, Cong Yu, Dichang Chen, Jiwei Xie, Shangfei Liu, Li Zhou, Bo Ma   +8 more
doaj   +1 more source

Stability of Multiplanet Systems through Hot Jupiter Destruction

The Astrophysical Journal Letters
Recent observational and theoretical work suggests that the sub-Jovian desert (periods ≲3 days, masses ∼10–100 M _⊕ ) hosts the remains of destroyed hot Jupiters (“desert dwellers”).
Donald Liveoak, Tim Hallatt, Sarah Millholland   +2 more
doaj   +1 more source

Planet population synthesis: the role of stellar encounters. [PDF]

Mon Not R Astron Soc, 2022
Ndugu N, Abedigamba OP, Andama G.
europepmc   +1 more source

“Popcorn Planets” Are Not Actively Inflated by Eccentricity Tides

The Astrophysical Journal Letters
Recent discoveries have revealed a population of “popcorn planets” that have masses similar to that of Neptune but radii comparable to Jupiter, leading to exceptionally low bulk densities ρ _p  ≲ 0.3 g cm ^−3 .
Samuel W. Yee, Shreyas Vissapragada
doaj   +1 more source

The Aligned Orbit of a Hot Jupiter around the M Dwarf TOI-4201

The Astrophysical Journal Letters
Measuring the obliquities of stars hosting giant planets may shed light on the dynamical history of planetary systems. Significant efforts have been made to measure the obliquities of FGK stars with hot Jupiters, mainly based on observations of the ...
Tianjun Gan, Sharon X. Wang, Fei Dai, Joshua N. Winn, Shude Mao, Siyi Xu, Enric Pallé, Jacob L. Bean, Madison Brady, Nina Brown, Cicero Lu, Rafael Luque, Teo Mocnik, Andreas Seifahrt, Guđmundur K. Stefánsson   +14 more
doaj   +1 more source

A survey of eight hot Jupiters in secondary eclipse using WIRCam at CFHT. [PDF]

Mon Not R Astron Soc, 2018
Martioli E, Colón KD, Angerhausen D, Stassun KG, Rodriguez JE, Zhou G, Gaudi BS, Pepper J, Beatty TG, Tata R, James DJ, Eastman JD, Wilson PA, Bayliss D, Stevens DJ.   +14 more
europepmc   +1 more source