TESS Observations of the WASP-121 b Phase Curve
© 2021. The American Astronomical Society. All rights reserved. We study the red-optical photometry of the ultrahot Jupiter WASP-121 b as observed by the Transiting Exoplanet Survey Satellite (TESS) and model its atmosphere through a radiative transfer simulation. Given its short orbital period of ∼...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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American Astronomical Society
2021
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| Online Access: | https://hdl.handle.net/1721.1/133630 |
| _version_ | 1826213942343499776 |
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| author | Daylan, Tansu Günther, Maximilian N Mikal-Evans, Thomas Sing, David K Wong, Ian Shporer, Avi Niraula, Prajwal Wit, Julien de Koll, Daniel DB Parmentier, Vivien Fetherolf, Tara Kane, Stephen R Ricker, George R Vanderspek, Roland Seager, S Winn, Joshua N Jenkins, Jon M Caldwell, Douglas A Charbonneau, David Henze, Christopher E Paegert, Martin Rinehart, Stephen Rose, Mark Sha, Lizhou Quintana, Elisa Villasenor, Jesus Noel |
| author_facet | Daylan, Tansu Günther, Maximilian N Mikal-Evans, Thomas Sing, David K Wong, Ian Shporer, Avi Niraula, Prajwal Wit, Julien de Koll, Daniel DB Parmentier, Vivien Fetherolf, Tara Kane, Stephen R Ricker, George R Vanderspek, Roland Seager, S Winn, Joshua N Jenkins, Jon M Caldwell, Douglas A Charbonneau, David Henze, Christopher E Paegert, Martin Rinehart, Stephen Rose, Mark Sha, Lizhou Quintana, Elisa Villasenor, Jesus Noel |
| author_sort | Daylan, Tansu |
| collection | MIT |
| description | © 2021. The American Astronomical Society. All rights reserved. We study the red-optical photometry of the ultrahot Jupiter WASP-121 b as observed by the Transiting Exoplanet Survey Satellite (TESS) and model its atmosphere through a radiative transfer simulation. Given its short orbital period of ∼1.275 days, inflated state, and bright host star, WASP-121 b is exceptionally favorable for detailed atmospheric characterization. Toward this purpose, we use allesfitter to characterize its full red-optical phase curve, including the planetary phase modulation and secondary eclipse. We measure the day- and nightside brightness temperatures in the TESS passband as 3012-+4240 and 2022-+602254 K, respectively, and do not find a statistically significant phase shift between the brightest and substellar points. This is consistent with inefficient heat recirculation on the planet. We then perform an atmospheric retrieval analysis to infer the dayside atmospheric properties of WASP-121 b, such as its bulk composition, albedo, and heat recirculation. We confirm the temperature inversion in the atmosphere and suggest H-, TiO, and VO as potential causes of the inversion, absorbing heat at optical wavelengths at low pressures. Future Hubble Space Telescope and James Webb Space Telescope observations of WASP-121 b will benefit from its first full phase curve measured by TESS. |
| first_indexed | 2024-09-23T15:57:17Z |
| format | Article |
| id | mit-1721.1/133630 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:57:17Z |
| publishDate | 2021 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1336302021-10-28T03:15:59Z TESS Observations of the WASP-121 b Phase Curve Daylan, Tansu Günther, Maximilian N Mikal-Evans, Thomas Sing, David K Wong, Ian Shporer, Avi Niraula, Prajwal Wit, Julien de Koll, Daniel DB Parmentier, Vivien Fetherolf, Tara Kane, Stephen R Ricker, George R Vanderspek, Roland Seager, S Winn, Joshua N Jenkins, Jon M Caldwell, Douglas A Charbonneau, David Henze, Christopher E Paegert, Martin Rinehart, Stephen Rose, Mark Sha, Lizhou Quintana, Elisa Villasenor, Jesus Noel © 2021. The American Astronomical Society. All rights reserved. We study the red-optical photometry of the ultrahot Jupiter WASP-121 b as observed by the Transiting Exoplanet Survey Satellite (TESS) and model its atmosphere through a radiative transfer simulation. Given its short orbital period of ∼1.275 days, inflated state, and bright host star, WASP-121 b is exceptionally favorable for detailed atmospheric characterization. Toward this purpose, we use allesfitter to characterize its full red-optical phase curve, including the planetary phase modulation and secondary eclipse. We measure the day- and nightside brightness temperatures in the TESS passband as 3012-+4240 and 2022-+602254 K, respectively, and do not find a statistically significant phase shift between the brightest and substellar points. This is consistent with inefficient heat recirculation on the planet. We then perform an atmospheric retrieval analysis to infer the dayside atmospheric properties of WASP-121 b, such as its bulk composition, albedo, and heat recirculation. We confirm the temperature inversion in the atmosphere and suggest H-, TiO, and VO as potential causes of the inversion, absorbing heat at optical wavelengths at low pressures. Future Hubble Space Telescope and James Webb Space Telescope observations of WASP-121 b will benefit from its first full phase curve measured by TESS. 2021-10-27T19:53:54Z 2021-10-27T19:53:54Z 2021 2021-09-15T16:25:30Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/133630 en 10.3847/1538-3881/ABD8D2 Astronomical 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 American Astronomical Society The American Astronomical Society |
| spellingShingle | Daylan, Tansu Günther, Maximilian N Mikal-Evans, Thomas Sing, David K Wong, Ian Shporer, Avi Niraula, Prajwal Wit, Julien de Koll, Daniel DB Parmentier, Vivien Fetherolf, Tara Kane, Stephen R Ricker, George R Vanderspek, Roland Seager, S Winn, Joshua N Jenkins, Jon M Caldwell, Douglas A Charbonneau, David Henze, Christopher E Paegert, Martin Rinehart, Stephen Rose, Mark Sha, Lizhou Quintana, Elisa Villasenor, Jesus Noel TESS Observations of the WASP-121 b Phase Curve |
| title | TESS Observations of the WASP-121 b Phase Curve |
| title_full | TESS Observations of the WASP-121 b Phase Curve |
| title_fullStr | TESS Observations of the WASP-121 b Phase Curve |
| title_full_unstemmed | TESS Observations of the WASP-121 b Phase Curve |
| title_short | TESS Observations of the WASP-121 b Phase Curve |
| title_sort | tess observations of the wasp 121 b phase curve |
| url | https://hdl.handle.net/1721.1/133630 |
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