ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B
The hot Jupiter HAT-P-2b has become a prime target for Spitzer Space Telescope observations aimed at understanding the atmospheric response of exoplanets on highly eccentric orbits. Here we present a suite of three-dimensional atmospheric circulation models for HAT-P-2b that investigate the effects...
| Main Authors: | , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
Institute of Physics/American Astronomical Society
2015
|
| Online Access: | http://hdl.handle.net/1721.1/93248 |
| _version_ | 1811069751238066176 |
|---|---|
| author | Lewis, Nikole Showman, Adam P. Fortney, Jonathan J. Knutson, Heather A. Marley, Mark S. |
| author2 | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences |
| author_facet | Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Lewis, Nikole Showman, Adam P. Fortney, Jonathan J. Knutson, Heather A. Marley, Mark S. |
| author_sort | Lewis, Nikole |
| collection | MIT |
| description | The hot Jupiter HAT-P-2b has become a prime target for Spitzer Space Telescope observations aimed at understanding the atmospheric response of exoplanets on highly eccentric orbits. Here we present a suite of three-dimensional atmospheric circulation models for HAT-P-2b that investigate the effects of assumed atmospheric composition and rotation rate on global scale winds and thermal patterns. We compare and contrast atmospheric models for HAT-P-2b, which assume one and five times solar metallicity, both with and without TiO/VO as atmospheric constituents. Additionally we compare models that assume a rotation period of half, one, and two times the nominal pseudo-synchronous rotation period. We find that changes in assumed atmospheric metallicity and rotation rate do not significantly affect model predictions of the planetary flux as a function of orbital phase. However, models in which TiO/VO are present in the atmosphere develop a transient temperature inversion between the transit and secondary eclipse events that results in significant variations in the timing and magnitude of the peak of the planetary flux compared with models in which TiO/VO are omitted from the opacity tables. We find that no one single atmospheric model can reproduce the recently observed full orbit phase curves at 3.6, 4.5 and 8.0 μm, which is likely due to a chemical process not captured by our current atmospheric models for HAT-P-2b. Further modeling and observational efforts focused on understanding the chemistry of HAT-P-2b's atmosphere are needed and could provide key insights into the interplay between radiative, dynamical, and chemical processes in a wide range of exoplanet atmospheres. |
| first_indexed | 2024-09-23T08:15:25Z |
| format | Article |
| id | mit-1721.1/93248 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:15:25Z |
| publishDate | 2015 |
| publisher | Institute of Physics/American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/932482022-09-23T11:56:08Z ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B Lewis, Nikole Showman, Adam P. Fortney, Jonathan J. Knutson, Heather A. Marley, Mark S. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Lewis, Nikole The hot Jupiter HAT-P-2b has become a prime target for Spitzer Space Telescope observations aimed at understanding the atmospheric response of exoplanets on highly eccentric orbits. Here we present a suite of three-dimensional atmospheric circulation models for HAT-P-2b that investigate the effects of assumed atmospheric composition and rotation rate on global scale winds and thermal patterns. We compare and contrast atmospheric models for HAT-P-2b, which assume one and five times solar metallicity, both with and without TiO/VO as atmospheric constituents. Additionally we compare models that assume a rotation period of half, one, and two times the nominal pseudo-synchronous rotation period. We find that changes in assumed atmospheric metallicity and rotation rate do not significantly affect model predictions of the planetary flux as a function of orbital phase. However, models in which TiO/VO are present in the atmosphere develop a transient temperature inversion between the transit and secondary eclipse events that results in significant variations in the timing and magnitude of the peak of the planetary flux compared with models in which TiO/VO are omitted from the opacity tables. We find that no one single atmospheric model can reproduce the recently observed full orbit phase curves at 3.6, 4.5 and 8.0 μm, which is likely due to a chemical process not captured by our current atmospheric models for HAT-P-2b. Further modeling and observational efforts focused on understanding the chemistry of HAT-P-2b's atmosphere are needed and could provide key insights into the interplay between radiative, dynamical, and chemical processes in a wide range of exoplanet atmospheres. United States. National Aeronautics and Space Administration (NASA Origins grant NNX12AI79G) United States. National Aeronautics and Space Administration (NASA PATM program) 2015-01-30T20:25:38Z 2015-01-30T20:25:38Z 2014-10 2013-11 Article http://purl.org/eprint/type/JournalArticle 1538-4357 http://hdl.handle.net/1721.1/93248 Lewis, Nikole K., Adam P. Showman, Jonathan J. Fortney, Heather A. Knutson, and Mark S. Marley. “ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B.” The Astrophysical Journal 795, no. 2 (October 23, 2014): 150. © 2014 American Astronomical Society. en_US http://dx.doi.org/10.1088/0004-637x/795/2/150 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf Institute of Physics/American Astronomical Society American Astronomical Society |
| spellingShingle | Lewis, Nikole Showman, Adam P. Fortney, Jonathan J. Knutson, Heather A. Marley, Mark S. ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B |
| title | ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B |
| title_full | ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B |
| title_fullStr | ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B |
| title_full_unstemmed | ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B |
| title_short | ATMOSPHERIC CIRCULATION OF ECCENTRIC HOT JUPITER HAT-P-2B |
| title_sort | atmospheric circulation of eccentric hot jupiter hat p 2b |
| url | http://hdl.handle.net/1721.1/93248 |
| work_keys_str_mv | AT lewisnikole atmosphericcirculationofeccentrichotjupiterhatp2b AT showmanadamp atmosphericcirculationofeccentrichotjupiterhatp2b AT fortneyjonathanj atmosphericcirculationofeccentrichotjupiterhatp2b AT knutsonheathera atmosphericcirculationofeccentrichotjupiterhatp2b AT marleymarks atmosphericcirculationofeccentrichotjupiterhatp2b |