Results 121 to 130 of about 2,563,330 (219)

Search for circum-planetary material and orbital period variations of short-period Kepler exoplanet candidates

open access: yes, 2014
A unique short-period (P = 0.65356(1) d) Mercury-size Kepler exoplanet candidate KIC012557548b has been discovered recently by Rappaport et al. (2012).
Zhou, Guyin (George)   +6 more
core   +1 more source

Unexpected Near-Resonant and Metastable States of Young Multiplanet Systems

open access: yesThe Astrophysical Journal
Recent observations suggest that the incidence of near-resonant planets declines as planetary systems age, making young planetary systems key signposts of early dynamical evolution.
Zhecheng Hu   +6 more
doaj   +1 more source

Far-ultraviolet Flares and Variability of the Young M Dwarf AU Mic: A Nondetection of Planet C in Transit at Lyα

open access: yesThe Astronomical Journal
Atmospheric escape’s potential to shape the exoplanet population motivates detailed observations of systems actively undergoing escape. AU Mic is a young and active M dwarf hosting two close-in transiting sub- to Neptune-sized planets. Atmospheric escape
Keighley E. Rockcliffe   +10 more
doaj   +1 more source

A key piece in the exoplanet puzzle

open access: yes, 2018
The detection of a low-mass exoplanet on a relatively wide orbit has implications for models of planetary formation and evolution, and could open the door to a new era of exoplanet characterization.Fil: Diaz, Rodrigo Fernando.
Rodrigo F. Díaz, Diaz, Rodrigo Fernando
core   +1 more source

Simulation of the Spin Evolution of Some Selected Exoplanets and Inferences on Their Climate

open access: yesUniverse
In this work, using the simulator VPLanet, we analyze the spin evolution of some selected exoplanets due to the tidal interaction with their host star. For a rocky planet, two spin “conditions” are possible, the “trapped” rotation and the “fast” rotation, referring to the cases of achieved and non-achieved tidal trapping, respectively.
Salvatore Camposeo   +4 more
openaire   +3 more sources

OrbDot: A Python package for studying the secular evolution of exoplanet orbits

open access: yesJournal of Open Source Software
OrbDot is a Python package for studying the secular (long-term) evolution of exoplanet orbits from observational data. It employs nested sampling algorithms to fit evolutionary models to any combination of transit and eclipse mid-times, radial velocities, and transit durations.
Simone R. Hagey, Aaron C. Boley
openaire   +3 more sources

Not All Sub-Neptune Exoplanets Have Magma Oceans

open access: yesThe Astrophysical Journal Letters
The evolution and structure of sub-Neptunes may be strongly influenced by interactions between the outer gaseous envelope of the planet and a surface magma ocean.
Bodie Breza   +2 more
doaj   +1 more source

dfm/exoplanet: exoplanet v0.1.5

open access: yes, 2019
<ul> <li>Improves contact point solver using companion matrix to solve quadratic</li> <li>Improves reliability of <code>Angle</code> distribution when the value of the angle is well constrained</li> </ul ...
Dan Foreman-Mackey   +2 more
core   +1 more source

No Strong Associations between Eccentricity and Orbital Architecture in Kepler Compact Multis

open access: yesThe Astronomical Journal
The dynamical history of a planetary system is recorded in the present day architecture of its constituent planets’ sizes, orbital periods, and eccentricities.
Gregory J. Gilbert   +2 more
doaj   +1 more source

dfm/exoplanet: exoplanet v0.1.4

open access: yes, 2019
<ul> <li>Improves the reliability of the PyMC3Sampler</li> <li>Adds a new <code>optimize</code> function since the <code>find_MAP</code> method in PyMC3 is deprecated</li> <li>Adds cronjob ...
Dan Foreman-Mackey   +2 more
core   +1 more source

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