Results 91 to 100 of about 9,753 (162)

EUV influences on exoplanet atmospheric stability and evolution

, 2019
Allison Youngblood, Kevin France, Tommi Koskinen, L. Fossati, Ute Amerstorfer, Herbert Lichtenegger, J. J. Drake, James Mason, Brian Fleming, Joel C. Allred, Zachory K. Berta-Thompson, V. Bourrier, Cynthia S. Froning, Cecilia Garraffo, Guillaume Gronoff, Meng Jin, Adam F. Kowalski, Rachel A. Osten   +17 more
openalex   +3 more sources

Reduced Water Loss due to Photochemistry on Terrestrial Planets in the Runaway Greenhouse Phase around Pre-main-sequence M Dwarfs

The Astrophysical Journal
Terrestrial planets currently in the habitable zone around M dwarfs are estimated to have been in runaway greenhouse conditions for up to ∼1 Gyr due to the long-term pre-main-sequence phase of M dwarfs.
Yo Kawamura, Tatsuya Yoshida, Naoki Terada, Yuki Nakamura, Shungo Koyama, Hiroki Karyu, Kaori Terada, Shotaro Sakai   +7 more
doaj   +1 more source

Water Evolution and Inventories of Super-Earths Orbiting Late M Dwarfs

The Astrophysical Journal
Super-Earths orbiting M dwarf stars may be the most common habitable planets in the Universe. However, their habitability is threatened by intense irradiation from their host stars, which drives the escape of water to space and can lead to surface ...
Keavin Moore, Benjamin David, Albert Yian Zhang, Nicolas B. Cowan   +3 more
doaj   +1 more source

Possible Evidence for the Presence of Volatiles on the Warm Super-Earth TOI-270 b

The Astronomical Journal
The search for atmospheres on rocky exoplanets is a crucial step in understanding the processes driving atmosphere formation, retention, and loss. Past studies have revealed the existence of planets interior to the radius valley with densities lower than
Louis-Philippe Coulombe, Björn Benneke, Joshua Krissansen-Totton, Alexandrine L’Heureux, Caroline Piaulet-Ghorayeb, Michael Radica, Pierre-Alexis Roy, Eva-Maria Ahrer, Charles Cadieux, Yamila Miguel, Hilke E. Schlichting, Elisa Delgado-Mena, Christopher Monaghan, Hanna Adamski, Eshan Raul, Ryan Cloutier, Thaddeus D. Komacek, Jake Taylor, Cyril Gapp, Romain Allart, François Bouchy, Bruno L. Canto Martins, Neil J. Cook, René Doyon, Thomas M. Evans-Soma, Pierre Larue, Alejandro Suárez Mascareño, Joost P. Wardenier   +27 more
doaj   +1 more source

Tracing the Winds: A Uniform Interpretation of Helium Escape in Exoplanets from Archival Spectroscopic Observations

The Astrophysical Journal
Over the past decade, observations of evaporating exoplanets have become increasingly common, driven by the discovery of the near-infrared helium-triplet line as a powerful probe of atmospheric escape.
Patrick McCreery, Leonardo A. Dos Santos, Néstor Espinoza, Romain Allart, James Kirk   +4 more
doaj   +1 more source

The Implications of Thermal Hydrodynamic Atmospheric Escape on the TRAPPIST-1 Planets

The Planetary Science Journal
JWST observations of the seven-planet TRAPPIST-1 system will provide an excellent opportunity to test outcomes of stellar-driven evolution of terrestrial planetary atmospheres, including atmospheric escape, ocean loss, and abiotic oxygen production ...
Megan T. Gialluca, Rory Barnes, Victoria S. Meadows, Rodolfo Garcia, Jessica Birky, Eric Agol   +5 more
doaj   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source

Revised Masses for Low-density Planets Orbiting the Disordered M-dwarf System TOI-1266

The Astronomical Journal
We present an analysis of 126 new radial velocity measurements from the MAROON-X spectrograph to investigate the TOI-1266 system, which hosts two known transiting sub-Neptunes at 10.8 and 18.8 days.
Dakotah Tyler, Erik A. Petigura, James Rogers, Jack Lubin, Andreas Seifhart, Jacob L. Bean, Madison Brady, Rafael Luque   +7 more
doaj   +1 more source

The Age and High-energy Environment of the Very Young Transiting Exoplanet TOI 1227b

The Astrophysical Journal
The mid-M star TOI 1227 hosts among the youngest known transiting exoplanets. We have conducted new X-ray imaging and optical spectroscopic observations of TOI 1227 aimed at ascertaining its age and the influence of its high-energy radiation on the ...
Attila Varga, Joel H. Kastner, Alexander S. Binks, Hans Moritz Günther, Simon J. Murphy   +4 more
doaj   +1 more source

Assessing Core-powered Mass Loss in the Context of Early Boil-off: Minimal Long-lived Mass Loss for the Sub-Neptune Population

The Astrophysical Journal
We develop a Python-based state-of-the-art sub-Neptune evolution model that incorporates both the post-formation boil-off at young ages ≤1 Myr and long-lived core-powered mass loss (∼Gyr) from interior cooling.
Yao Tang, Jonathan J. Fortney, Ruth Murray-Clay   +2 more
doaj   +1 more source