Results 131 to 140 of about 16,797 (229)

The Epoch of Giant Planet Migration Planet Search Program. II. A Young Hot Jupiter Candidate around the AB Dor Member HS Psc

The Astronomical Journal
We report the discovery of a hot Jupiter candidate orbiting HS Psc, a K7 (≈0.7 M _⊙ ) member of the ≈130 Myr AB Doradus moving group. Using radial velocities over 4 yr from the Habitable-zone Planet Finder spectrograph at the Hobby–Eberly Telescope, we ...
Quang H. Tran, Brendan P. Bowler, William D. Cochran, Samuel Halverson, Suvrath Mahadevan, Joe P. Ninan, Paul Robertson, Guđmundur Stefánsson, Ryan C. Terrien   +8 more
doaj   +1 more source

Where Are the Water Worlds? Identifying Exo-water-worlds Using Models of Planet Formation and Atmospheric Evolution

The Astrophysical Journal
Planet formation models suggest that the small exoplanets that migrate from beyond the snowline of the protoplanetary disk likely contain water-ice-rich cores (∼50% by mass), also known as water worlds.
Aritra Chakrabarty, Gijs D. Mulders
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

Pushing the envelope of exoplanet evolution modelling

, 2021
Propelled by the discovery of the first exoplanet thirty years ago, the scientific community has rallied and made tremendous strides towards a full understand of the formation and evolution of planetary systems. During this period, over 4, 300 confirmed exoplanets have been detected, and the resulting dataset has driven a revolution by allowing for new
openaire   +1 more source

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

The evolution of hot Jupiters revealed by the age distribution of their host stars. [PDF]

Proc Natl Acad Sci U S A, 2023
Chen DC, Xie JW, Zhou JL, Dong S, Yang JY, Zhu W, Liu C, Huang Y, Xiang MS, Wang HF, Zheng Z, Luo AL, Zhang JH, Zhu Z.   +13 more
europepmc   +1 more source

The Formation of Double Hot Jupiter Systems through von Zeipel–Lidov–Kozai Migration

The Astrophysical Journal
The von Zeipel–Lidov–Kozai (ZLK) mechanism with tidal friction has been demonstrated as a promising avenue to generate hot Jupiters in stellar binary systems.
Yurou Liu, Tiger Lu, Malena Rice
doaj   +1 more source

Evolution of the Exoplanet Size Distribution: Forming Large Super-Earths Over Billions of Years [PDF]

, 2021
Trevor J. David, Gabriella Contardo, Angeli Sandoval, Ruth Angus, Yuxi Lu, Megan Bedell, Jason L. Curtis, Daniel Foreman-Mackey, Benjamin J. Fulton, Samuel K. Grunblatt, Erik A. Petigura   +10 more
openalex   +1 more source

Modelling the effect of stellar metallicity on the XUV evolution of low-mass stars and its impact on exoplanet atmospheres/habitability [PDF]

Victor See, Charlotte Fairman, Louis Amard, Oliver Hall   +3 more
openalex   +2 more sources

The Impact-driven Atmospheric Loss of Super-Earths around Different Spectral Types of Host Stars

The Astrophysical Journal
A planet’s mass loss is important for the its formation and evolution. The radius valley (RV) is believed to be triggered by evaporation-induced mass loss.
Wei Zhong, Cong Yu, Shi Jia, Shang-Fei Liu   +3 more
doaj   +1 more source