Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves
© 2019 The Author(s). The exoplanet WASP-12b is the prototype for the emerging class of ultrahot, Jupiter-mass exoplanets. Past models have predicted - and near-ultraviolet observations have shown - that this planet is losing mass. We present an analysis of two sets of 3.6 and 4.5 μm Spitzer phase c...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Oxford University Press (OUP)
2021
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| Online Access: | https://hdl.handle.net/1721.1/132397 |
| _version_ | 1811072535336321024 |
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| author | Bell, Taylor J Zhang, Michael Cubillos, Patricio E Dang, Lisa Fossati, Luca Todorov, Kamen O Cowan, Nicolas B Deming, Drake Zellem, Robert T Stevenson, Kevin B Crossfield, Ian JM Dobbs-Dixon, Ian Fortney, Jonathan J Knutson, Heather A Line, Michael R |
| author_facet | Bell, Taylor J Zhang, Michael Cubillos, Patricio E Dang, Lisa Fossati, Luca Todorov, Kamen O Cowan, Nicolas B Deming, Drake Zellem, Robert T Stevenson, Kevin B Crossfield, Ian JM Dobbs-Dixon, Ian Fortney, Jonathan J Knutson, Heather A Line, Michael R |
| author_sort | Bell, Taylor J |
| collection | MIT |
| description | © 2019 The Author(s). The exoplanet WASP-12b is the prototype for the emerging class of ultrahot, Jupiter-mass exoplanets. Past models have predicted - and near-ultraviolet observations have shown - that this planet is losing mass. We present an analysis of two sets of 3.6 and 4.5 μm Spitzer phase curve observations of the system which show clear evidence of infrared radiation from gas stripped from the planet, and the gas appears to be flowing directly toward or away from the host star. This accretion signature is only seen at 4.5 μm, not at 3.6 μm, which is indicative either of CO emission at the longer wavelength or blackbody emission from cool, ≲600 K gas. It is unclear why WASP-12b is the only ultrahot Jupiter to exhibit this mass-loss signature, but perhaps WASP-12b's orbit is decaying as some have claimed, while the orbits of other exoplanets may be more stable; alternatively, the high-energy irradiation from WASP-12A may be stronger than the other host stars. We also find evidence for phase offset variability at the level of 6.4σ (46.2°) at 3.6 μm. |
| first_indexed | 2024-09-23T09:07:28Z |
| format | Article |
| id | mit-1721.1/132397 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T09:07:28Z |
| publishDate | 2021 |
| publisher | Oxford University Press (OUP) |
| record_format | dspace |
| spelling | mit-1721.1/1323972021-09-21T03:59:47Z Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves Bell, Taylor J Zhang, Michael Cubillos, Patricio E Dang, Lisa Fossati, Luca Todorov, Kamen O Cowan, Nicolas B Deming, Drake Zellem, Robert T Stevenson, Kevin B Crossfield, Ian JM Dobbs-Dixon, Ian Fortney, Jonathan J Knutson, Heather A Line, Michael R © 2019 The Author(s). The exoplanet WASP-12b is the prototype for the emerging class of ultrahot, Jupiter-mass exoplanets. Past models have predicted - and near-ultraviolet observations have shown - that this planet is losing mass. We present an analysis of two sets of 3.6 and 4.5 μm Spitzer phase curve observations of the system which show clear evidence of infrared radiation from gas stripped from the planet, and the gas appears to be flowing directly toward or away from the host star. This accretion signature is only seen at 4.5 μm, not at 3.6 μm, which is indicative either of CO emission at the longer wavelength or blackbody emission from cool, ≲600 K gas. It is unclear why WASP-12b is the only ultrahot Jupiter to exhibit this mass-loss signature, but perhaps WASP-12b's orbit is decaying as some have claimed, while the orbits of other exoplanets may be more stable; alternatively, the high-energy irradiation from WASP-12A may be stronger than the other host stars. We also find evidence for phase offset variability at the level of 6.4σ (46.2°) at 3.6 μm. 2021-09-20T18:22:13Z 2021-09-20T18:22:13Z 2020-10-19T17:55:11Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/132397 en 10.1093/MNRAS/STZ2018 Monthly Notices of the Royal Astronomical Society Creative Commons Attribution-Noncommercial-Share Alike http://creativecommons.org/licenses/by-nc-sa/4.0/ application/pdf Oxford University Press (OUP) arXiv |
| spellingShingle | Bell, Taylor J Zhang, Michael Cubillos, Patricio E Dang, Lisa Fossati, Luca Todorov, Kamen O Cowan, Nicolas B Deming, Drake Zellem, Robert T Stevenson, Kevin B Crossfield, Ian JM Dobbs-Dixon, Ian Fortney, Jonathan J Knutson, Heather A Line, Michael R Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves |
| title | Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves |
| title_full | Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves |
| title_fullStr | Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves |
| title_full_unstemmed | Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves |
| title_short | Mass Loss from the Exoplanet WASP-12b Inferred from Spitzer Phase Curves |
| title_sort | mass loss from the exoplanet wasp 12b inferred from spitzer phase curves |
| url | https://hdl.handle.net/1721.1/132397 |
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