Zobrazeno 1 - 10
of 27
pro vyhledávání: '"Exoplanet atmospheric evolution"'
Autor:
Caroline Piaulet-Ghorayeb, Björn Benneke, Michael Radica, Eshan Raul, Louis-Philippe Coulombe, Eva-Maria Ahrer, Daria Kubyshkina, Ward S. Howard, Joshua Krissansen-Totton, Ryan J. MacDonald, Pierre-Alexis Roy, Amy Louca, Duncan Christie, Marylou Fournier-Tondreau, Romain Allart, Yamila Miguel, Hilke E. Schlichting, Luis Welbanks, Charles Cadieux, Caroline Dorn, Thomas M. Evans-Soma, Jonathan J. Fortney, Raymond Pierrehumbert, David Lafrenière, Lorena Acuña, Thaddeus Komacek, Hamish Innes, Thomas G. Beatty, Ryan Cloutier, René Doyon, Anna Gagnebin, Cyril Gapp, Heather A. Knutson
Publikováno v:
The Astrophysical Journal Letters, Vol 974, Iss 1, p L10 (2024)
With sizable volatile envelopes but smaller radii than the solar system ice giants, sub-Neptunes have been revealed as one of the most common types of planet in the galaxy. While the spectroscopic characterization of larger sub-Neptunes (2.5–4 R _
Externí odkaz:
https://doaj.org/article/bafb1eec668c4c80b09ceaf693c9125e
Autor:
Shreyas Vissapragada, Patrick McCreery, Leonardo A. Dos Santos, Néstor Espinoza, Andrew McWilliam, Noriyuki Matsunaga, Jéa Adams Redai, Patrick Behr, Kevin France, Satoshi Hamano, Charlie Hull, Yuji Ikeda, Haruki Katoh, Hideyo Kawakita, Mercedes López-Morales, Kevin N. Ortiz Ceballos, Shogo Otsubo, Yuki Sarugaku, Tomomi Takeuchi
Publikováno v:
The Astrophysical Journal Letters, Vol 962, Iss 1, p L19 (2024)
The recent discovery of “ultrahot” ( P < 1 day) Neptunes has come as a surprise: some of these planets have managed to retain gaseous envelopes despite being close enough to their host stars to trigger strong photoevaporation and/or Roche lobe ov
Externí odkaz:
https://doaj.org/article/ccc1cd63fc4e4bcd8f9b79ffc4633e60
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 131 (2024)
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 de
Externí odkaz:
https://doaj.org/article/39ca2e78ff28448a8ecfcd10e6a74dae
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 47 (2024)
Small, close-in exoplanets are divided into two subpopulations: super-Earths and sub-Neptunes. Most super-Earths are thought to have lost their primordially accreted hydrogen-dominated atmospheres via thermally driven winds. We consider the global ch
Externí odkaz:
https://doaj.org/article/c2857add8b8c4840a545ad6072ac109f
Publikováno v:
The Astronomical Journal, Vol 168, Iss 1, p 30 (2024)
Searches for helium in the exospheres of exoplanets via the metastable near-infrared triplet have yielded 17 detections and 40 nondetections. We performed a comprehensive reanalysis of published studies to investigate the influence of stellar X-ray a
Externí odkaz:
https://doaj.org/article/9d8e9b8384d540749855f168dadc3657
Autor:
Megan T. Gialluca, Rory Barnes, Victoria S. Meadows, Rodolfo Garcia, Jessica Birky, Eric Agol
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 6, p 137 (2024)
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.
Externí odkaz:
https://doaj.org/article/53a078f34f234d5cb22e8a034e4b79fb
Autor:
Samuel K. Grunblatt, Nicholas Saunders, Daniel Huber, Daniel Thorngren, Shreyas Vissapragada, Stephanie Yoshida, Kevin C. Schlaufman, Steven Giacalone, Mason Macdougall, Ashley Chontos, Emma Turtelboom, Corey Beard, Joseph M. Akana Murphy, Malena Rice, Howard Isaacson, Ruth Angus, Andrew W. Howard
Publikováno v:
The Astronomical Journal, Vol 168, Iss 1, p 1 (2024)
Hot Neptunes, gaseous planets smaller than Saturn (∼3–8 R _⊕ ) with orbital periods less than 10 days, are rare. Models predict this is due to high-energy stellar irradiation stripping planetary atmospheres over time, often leaving behind only
Externí odkaz:
https://doaj.org/article/60a3ed11600f46b49d2be5cb04e96478
Autor:
Anne Dattilo, Natalie M. Batalha
Publikováno v:
The Astronomical Journal, Vol 167, Iss 6, p 288 (2024)
The Kepler mission enabled us to look at the intrinsic population of exoplanets within our galaxy. In period-radius space, the distribution of the intrinsic population of planets contains structure that can trace planet formation and evolution histor
Externí odkaz:
https://doaj.org/article/8348a94fdca3421c9b7168dcd7b1fe3e
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 139 (2024)
We simulate atmospheric fractionation in escaping planetary atmospheres using IsoFATE , a new open-source numerical model. We expand the parameter space studied previously to planets with tenuous atmospheres that exhibit the greatest helium and deute
Externí odkaz:
https://doaj.org/article/6f615d5eabc6473c8de59d3fe5193286
Autor:
Yo Kawamura, Tatsuya Yoshida, Naoki Terada, Yuki Nakamura, Shungo Koyama, Hiroki Karyu, Kaori Terada, Shotaro Sakai
Publikováno v:
The Astrophysical Journal, Vol 967, Iss 2, p 95 (2024)
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. These planets likely lose a significant porti
Externí odkaz:
https://doaj.org/article/d299600b1bd4456e8e224d9f9949e49f