Results 1 to 10 of about 16,797 (229)

Investigating Exoplanet Orbital Evolution Around Binary Star Systems with Mass Loss [PDF]

open access: goldJournal of Astronomy and Space Sciences, 2016
A planet revolving around binary star system is a familiar system. Studies of these systems are important because they provide precise knowledge of planet formation and orbit evolution. In this study, a method to determine the evolution of an exoplanet
Walid A. Rahoma
doaj   +2 more sources

True Polar Wander of Lava Worlds

open access: yesThe Astrophysical Journal Letters, 2023
As one of the most detectable types of terrestrial planets, lava worlds are highly prioritized targets for exoplanet atmosphere characterization since their atmospheres may reveal what they are made of and how.
Wanying Kang, Francis Nimmo, Feng Ding
doaj   +1 more source

Surrounded by Giants: Habitable Zone Stability Within the HD 141399 System

open access: yesThe Astronomical Journal, 2023
The search for exoplanets has revealed a diversity of planetary system architectures, the vast majority of which diverge significantly from the template of the solar system.
Stephen R. Kane
doaj   +1 more source

Evolution of Planetary Obliquity: The Eccentric Kozai–Lidov Mechanism Coupled with Tide

open access: yesThe Astrophysical Journal, 2023
Planetary obliquity plays a significant role in determining the physical properties of planetary surfaces and climate. As direct detection is constrained due to the present observation accuracy, kinetic theories are helpful for predicting the evolution ...
Xiumin Huang   +4 more
doaj   +1 more source

Dynamical Evolution of Closely Packed Multiple Planetary Systems Subject to Atmospheric Mass Loss

open access: yesThe Astronomical Journal, 2023
A gap in exoplanets’ radius distribution has been widely attributed to the photoevaporation threshold of their progenitors’ gaseous envelope. Giant impacts can also lead to substantial mass loss.
Su Wang, D. N. C. Lin
doaj   +1 more source

Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems [PDF]

open access: yes, 2006
We present results of a reconnaissance for stellar companions to all 131 radial-velocity-detected candidate extrasolar planetary systems known as of July 1, 2005.
Beaulieu, Thom D.   +6 more
core   +2 more sources

TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain

open access: yesThe Astronomical Journal, 2023
Convergent disk migration has long been suspected to be responsible for forming planetary systems with a chain of mean-motion resonances (MMRs). Dynamical evolution over time could disrupt the delicate resonant configuration. We present TOI-1136, a 700 ±
Fei Dai   +62 more
doaj   +1 more source

DYNAMIC EVOLUTION EXOPLANET SYSTEMS, MOVING IN ORBITAL RESONANCES WITH THE ACCOUNT OF SECULAR PERTURBATION FROM N BODIES

open access: yesOdessa Astronomical Publications, 2017
Equations of exoplanet's motion connected with orbital Lindblad resonances with the account of secular terms caused by gravitational non-resonant perturbation are derived. Qualitative researches of orbital evolution modeling exoplanet systems are carried
B. R. Mushailov, A. K. Chuyas
doaj   +1 more source

Helium Atmospheres on Warm Neptune- and Sub-Neptune-Sized Exoplanets and Applications to GJ 436 b [PDF]

open access: yes, 2015
Warm Neptune- and sub-Neptune-sized exoplanets in orbits smaller than Mercury's are thought to have experienced extensive atmospheric evolution. Here we propose that a potential outcome of this atmospheric evolution is the formation of helium-dominated ...
Hu, Renyu, Seager, Sara, Yung, Yuk L.
core   +3 more sources

The Apparent Tidal Decay of WASP-4 b Can Be Explained by the Rømer Effect

open access: yesUniverse, 2023
Tidal orbital decay plays a vital role in the evolution of hot Jupiter systems. As of now, this has only been observationally confirmed for the WASP-12 system.
Jan-Vincent Harre, Alexis M. S. Smith
doaj   +1 more source

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