Zobrazeno 1 - 10
of 220
pro vyhledávání: '"planetary interior"'
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 1, p L1 (2024)
Recent observational constraints on the internal structure of Jupiter and Saturn suggest that these planets have “fuzzy” cores, i.e., gradients of the concentration of heavy elements that might span a large fraction of the planet’s radius. Thes
Externí odkaz:
https://doaj.org/article/e2ded98f15314c2b96db7d57217d880f
Autor:
Charles Cadieux, Mykhaylo Plotnykov, René Doyon, Diana Valencia, Farbod Jahandar, Lisa Dang, Martin Turbet, Thomas J. Fauchez, Ryan Cloutier, Collin Cherubim, Étienne Artigau, Neil J. Cook, Billy Edwards, Tim Hallatt, Benjamin Charnay, François Bouchy, Romain Allart, Lucile Mignon, Frédérique Baron, Susana C. C. Barros, Björn Benneke, B. L. Canto Martins, Nicolas B. Cowan, J. R. De Medeiros, Xavier Delfosse, Elisa Delgado-Mena, Xavier Dumusque, David Ehrenreich, Yolanda G. C. Frensch, J. I. González Hernández, Nathan C. Hara, David Lafrenière, Gaspare Lo Curto, Lison Malo, Claudio Melo, Dany Mounzer, Vera Maria Passeger, Francesco Pepe, Anne-Sophie Poulin-Girard, Nuno C. Santos, Danuta Sosnowska, Alejandro Suárez Mascareño, Simon Thibault, Valentina Vaulato, Gregg A. Wade, François Wildi
Publikováno v:
The Astrophysical Journal Letters, Vol 960, Iss 1, p L3 (2024)
The two-planet transiting system LHS 1140 has been extensively observed since its discovery in 2017, notably with Spitzer, HST, TESS, and ESPRESSO, placing strong constraints on the parameters of the M4.5 host star and its small temperate exoplanets,
Externí odkaz:
https://doaj.org/article/248184ef49024f78bbde20d84a848845
Autor:
S. Markham, T. Guillot
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 12, p 269 (2024)
At sufficiently high pressures (∼Mbar) and low temperatures (∼10 ^3 –10 ^4 K), hydrogen and helium become partly immiscible. Interpretations of Jupiter’s and Saturn’s magnetic fields favor the existence of a statically stable layer near the
Externí odkaz:
https://doaj.org/article/3d3882e03f434fe19addaf5f9a74c89b
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 2, p 221 (2024)
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. We investigate the roles of initial
Externí odkaz:
https://doaj.org/article/4cf5f66f9efd46c2928a97cf8095952c
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 255 (2024)
The linear mixing approximation (LMA) is often used in planetary models for calculating the equations of state (EOS) of mixtures. A commonly assumed planetary composition is a mixture of rock and water. Here we assess the accuracy of the LMA for pres
Externí odkaz:
https://doaj.org/article/78278d4d989648aab3c0f349c238570d
Autor:
Frances E. Rigby, Lorenzo Pica-Ciamarra, Måns Holmberg, Nikku Madhusudhan, Savvas Constantinou, Laura Schaefer, Jie Deng, Kanani K. M. Lee, Julianne I. Moses
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 101 (2024)
The recent JWST detections of carbon-bearing molecules in a habitable-zone sub-Neptune have opened a new era in the study of low-mass exoplanets. The sub-Neptune regime spans a wide diversity of planetary interiors and atmospheres not witnessed in th
Externí odkaz:
https://doaj.org/article/27c3c20326d545e892e6a62088ce54ce
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 1, p 14 (2024)
Most exoplanets with a few Earth radii are more inflated than bare-rock planets with the same mass, indicating a substantial volatile amount. Neither the origin of the volatiles nor the planet’s bulk composition can be constrained from the mass–r
Externí odkaz:
https://doaj.org/article/c9edafcb3aa24ac59af46b9ea4cb187a
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 10, p 226 (2024)
Images from the Voyager 2 mission revealed the small Uranian satellite Miranda to be a complex, dynamic world. This is exemplified by signs of recent geological activity, including an extensive fault system and the mysterious coronae. This has led to
Externí odkaz:
https://doaj.org/article/5ef9ccfcab874b94816b28fd801b2d9c
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 274, Iss 2, p 34 (2024)
The equation of state of hydrogen–helium (H–He) mixtures plays a vital role in the evolution and structure of gas giant planets and exoplanets. Recent equations of state that account for H–He interactions, coupled with H–He immiscibility curv
Externí odkaz:
https://doaj.org/article/8eea32f78fd648a6838c58221374e064
Autor:
Lauren R. Schurmeier, Gwendolyn E. Brouwer, Jonathan P. Kay, Sarah A. Fagents, Angela G. Marusiak, Steven D. Vance
Publikováno v:
The Planetary Science Journal, Vol 5, Iss 9, p 211 (2024)
Titan’s impact craters are hundreds of meters shallower than expected, compared to similar-sized craters on Ganymede. Only 90 crater candidates have been identified, the majority of which have low certainty of an impact origin. Many processes have
Externí odkaz:
https://doaj.org/article/d18feabbf9ae487790f9956c55a7c304