Results 21 to 30 of about 10,001 (169)
INCREASE: An updated model suite to study the INfluence of Cosmic Rays on Exoplanetary AtmoSpherEs
Astronomische Nachrichten, Volume 343, Issue 4, May 2022., 2022 Abstract Exoplanets are as diverse as they are fascinating. They vary from ultrahot Jupiter‐like low‐density planets to presumed gas‐ice‐rock mixture worlds such as GJ 1214b or worlds as LHS 1140b, which features twice the Earth's bulk density. Regarding the great diversity of exoplanetary atmospheres, much remains to be explored.
Konstantin Herbst +3 more
wiley +1 more source
The Astronomical Journal, 2023 Binary stars are ubiquitous; the majority of solar-type stars exist in binaries. Exoplanet occurrence rate is suppressed in binaries, but some multiples do still host planets.
Kendall Sullivan +9 more
doaj +1 more source
The harsh environment where exoplanets live
Astronomische Nachrichten, Volume 343, Issue 4, May 2022., 2022 Abstract The X‐ray and Extreme Ultraviolet (XUV) actvity of the Sun has determined important effects on the planets around it. In particular, high doses of X‐rays, flares, and coronal mass ejections (CMEs) combined with masses and sizes of the planets and the shielding action of the planetary magnetic fields have determined the diverse habitability of ...
Ignazio Pillitteri
wiley +1 more source
The Origin of Earth's Mantle Nitrogen: Primordial or Early Biogeochemical Cycling?
Geochemistry, Geophysics, Geosystems, Volume 23, Issue 5, May 2022., 2022 Abstract Earth's mantle nitrogen (N) content is comparable to that found in its N‐rich atmosphere. Mantle N has been proposed to be primordial or sourced by later subduction, yet its origin has not been elucidated. Here we model N partitioning during the magma ocean stage following planet formation and the subsequent cycling between the surface and ...
H. Kurokawa +7 more
wiley +1 more source
The Direct Mid-infrared Detectability of Habitable-zone Exoplanets around Nearby Stars
The Astronomical Journal, 2023 Giant planets within the habitable zones of the closest several stars can currently be imaged with ground-based telescopes. Within the next decade, the Extremely Large Telescopes (ELTs) will begin to image the habitable zones of a greater number of ...
Zach Werber, Kevin Wagner, Dániel Apai
doaj +1 more source
The Astronomical Journal, 2023 The radius valley carries implications for how the atmospheres of small planets form and evolve, but this feature is visible only with highly precise characterizations of many small planets.
Dominic Oddo +43 more
doaj +1 more source
Devolatilization of extrasolar planetesimals by 60Fe and 26Al heating [PDF]
Monthly notices of the Royal Astronomical SocietyWhilst the formation of Solar system planets is constrained by meteoritic evidence, the geophysical history of low-mass exoplanets is much less clear.
J. W. Eatson +3 more
semanticscholar +1 more source
WARM SATURNS: ON THE NATURE OF RINGS AROUND EXTRASOLAR PLANETS THAT RESIDE INSIDE THE ICE LINE [PDF]
, 2011 We discuss the nature of rings that may exist around extrasolar planets. Taking the general properties of rings around the gas giants in the solar system, we infer the likely properties of rings around exoplanets that reside inside the ice line.
H. Schlichting, P. Chang
semanticscholar +1 more source
Detecting Solar System Analogs through Joint Radial Velocity/Astrometric Surveys
The Astronomical Journal, 2023 Earth-mass exoplanets on year-long orbits and cool gas giants (CGG) on decade-long orbits lie at the edge of current detection limits. The Terra Hunting Experiment (THE) will take nightly radial velocity (RV) observations on HARPS3 of at least 40 bright ...
Daniel A. Yahalomi +3 more
doaj +1 more source
DETECTING VOLCANISM ON EXTRASOLAR PLANETS [PDF]
, 2010 The search for extrasolar rocky planets has already found the first transiting rocky super-Earth, Corot 7b, with a surface temperature that allows for magma oceans.
L. Kaltenegger, W. Henning, D. Sasselov
semanticscholar +1 more source