A Guide to Realistic Uncertainties on the Fundamental Properties of Solar-type Exoplanet Host Stars [PDF]
Astrophysical Journal, 2020 Our understanding of the properties and demographics of exoplanets critically relies on our ability to determine the fundamental properties of their host stars. The advent of Gaia and large spectroscopic surveys has now made it possible, in principle, to
J. Tayar +3 more
semanticscholar +1 more source
How to Identify Exoplanet Surfaces Using Atmospheric Trace Species in Hydrogen-dominated Atmospheres [PDF]
Astrophysical Journal, 2021 Sub-Neptunes (R p ∼ 1.25–4 R Earth) remain the most commonly detected exoplanets to date. However, it remains difficult for observations to tell whether these intermediate-sized exoplanets have surfaces and where their surfaces are located.
Xinting 婷 Yu 余馨 +3 more
semanticscholar +1 more source
The Apparent Tidal Decay of WASP-4 b Can Be Explained by the Rømer Effect
Universe, 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
A Stellar Mass Dependence of Structured Disks: A Possible Link with Exoplanet Demographics [PDF]
, 2021 Gaps in protoplanetary disks have long been hailed as signposts of planet formation. However, a direct link between exoplanets and disks remains hard to identify.
N. van der Marel, G. Mulders
semanticscholar +1 more source
Untangling the Galaxy. IV. Empirical Constraints on Angular Momentum Evolution and Gyrochronology for Young Stars in the Field [PDF]
Astronomical Journal, 2022 We present a catalog of ∼100,000 periodic variable stars in Transiting Exoplanet Survey Satellite (TESS) full-frame image data among members of widely distributed moving groups identified with Gaia in the previous papers in the series.
M. Kounkel +5 more
semanticscholar +1 more source
Discovery of a Long-duration Superflare on a Young Solar-type Star EK Draconis with Nearly Similar Time Evolution for Hα and White-light Emissions [PDF]
Astrophysical Journal Letters, 2022 Young solar-type stars are known to show frequent “superflares,” which may severely influence the habitable worlds on young planets via intense radiation and coronal mass ejections. Here we report an optical spectroscopic and photometric observation of a
K. Namekata +19 more
semanticscholar +1 more source
Odessa 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
A new type of exoplanet direct imaging search: a SCExAO/CHARIS survey of accelerating stars [PDF]
Optical Engineering + Applications, 2021 We present first results from a new exoplanet direct imaging survey being carried out with the Subaru Coronagraphic Extreme Adaptive Optics project coupled with the CHARIS integral field spectrograph.
T. Currie +14 more
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The Possible Evolution of an Exoplanet’s Atmosphere
Eos, 2021 Scientific sleuths explore data gathered trillions of kilometers away and put forth different, and often conflicting, ideas to reconstruct the gaseous envelope on a distant rocky exoplanet, GJ 1132 b.
openaire +1 more source
Host-star and exoplanet compositions: a pilot study using a wide binary with a polluted white dwarf [PDF]
Monthly notices of the Royal Astronomical Society, 2021 Planets and stars ultimately form out of the collapse of the same cloud of gas. Whilst planets, and planetary bodies, readily loose volatiles, a common hypothesis is that they retain the same refractory composition as their host star.
A. Bonsor +5 more
semanticscholar +1 more source