Zobrazeno 1 - 10 of 63 pro vyhledávání: '"Richard S. Freedman"'
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The Sonora Brown Dwarf Atmosphere and Evolution Models I. Model Description and Application to Cloudless Atmospheres in Rainout Chemical Equilibrium
Autor: Channon Visscher, Didier Saumon, Christopher Seay, Adam J. R. W. Smith, Caroline V. Morley, Richard S. Freedman, Jonathan J. Fortney, D. J. Teal, Roxana E. Lupu, Ruoyan Wang, Mark S. Marley
Publikováno v: The Astrophysical Journal, 920(2)
We present a new generation of substellar atmosphere and evolution models, appropriate for application to studies of L, T, and Y-type brown dwarfs and self-luminous extrasolar planets. The atmosphere models describe the expected temperature-pressure
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dc019009e726f1285f8e0ef371d84263
http://arxiv.org/abs/2107.07434
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5
Following the Lithium: Tracing Li-bearing Molecules Across Age, Mass, and Gravity in Brown Dwarfs
Autor: Mark S. Marley, Roxana E. Lupu, Ehsan Gharib-Nezhad, Channon Visscher, Natasha E. Batalha, Richard S. Freedman
Lithium is an important element for the understanding of ultracool dwarfs because it is lost to fusion at masses above $\sim 68\, M_{\rm J}$. Hence, the presence or absence of atomic Li has served as an indicator of the nearby H-burning boundary at a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b1abfe6532d7aa094ac22b2ab5e1e334
http://arxiv.org/abs/2106.00781
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7
Prospects for Characterizing the Haziest Sub-Neptune Exoplanets with High-resolution Spectroscopy
Autor: Michael R. Line, Caroline V. Morley, Zafar Rustamkulov, Emily C. Martin, Jonathan J. Fortney, Richard S. Freedman, Jayne Birkby, Roxana E. Lupu, Callie Hood
Publikováno v: Astronomical Journal, 160(5):198. IOP Publishing Ltd.
Observations to characterize planets larger than Earth but smaller than Neptune have led to largely inconclusive interpretations at low spectral resolution due to hazes or clouds that obscure molecular features in their spectra. However, here we show
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::13cabe6e454d7cc3c14a1b299093bbca
https://dare.uva.nl/personal/pure/en/publications/prospects-for-characterizing-the-haziest-subneptune-exoplanets-with-highresolution-spectroscopy(1d61ea68-3b4f-436d-b59f-965ecb06b84a).html
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8
Beyond Equilibrium Temperature: How the Atmosphere/Interior Connection Affects the Onset of Methane, Ammonia, and Clouds in Warm Transiting Giant Planets
Autor: Jonathan J. Fortney, Callie Hood, Michael R. Line, Daniel Thorngren, Richard S. Freedman, Roxana E. Lupu, Channon Visscher, Mark S. Marley
The atmospheric pressure-temperature profiles for transiting giant planets cross a range of chemical transitions. Here we show that the particular shape of these irradiated profiles for warm giant planets below 1300 K lead to striking differences in
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::18b6b8dc2ed53430f05b5c2dd587e5eb
http://arxiv.org/abs/2010.00146
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9
Observations of Disequilibrium CO Chemistry in the Coldest Brown Dwarfs
Autor: Jonathan J. Fortney, Gordon L. Bjoraker, Mark S. Marley, Brittany E. Miles, Adam C. Schneider, Jacqueline K. Faherty, Richard S. Freedman, Channon Visscher, Katelyn N. Allers, Roxana E. Lupu, Caroline V. Morley, Andrew J. Skemer, Thomas R. Geballe
Cold brown dwarfs are excellent analogs of widely separated, gas giant exoplanets, and provide insight into the potential atmospheric chemistry and physics we may encounter in objects discovered by future direct imaging surveys. We present a low reso
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e3ccd328285a9e774cc4059e9417f3e
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