WASP-4b arrived early for the TESS mission
The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 ± 11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observat...
| Main Authors: | , , , , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
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American Astronomical Society
2020
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| Online Access: | https://hdl.handle.net/1721.1/124720 |
| _version_ | 1811075258718879744 |
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| author | Daylan, Tansu Villasenor, Jesus Noel Samonte Ricker, George R. Vanderspek, Roland K. Seager, Sara Fausnaugh, Michael Glidden, Ana Guerrero, Natalia |
| 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 Daylan, Tansu Villasenor, Jesus Noel Samonte Ricker, George R. Vanderspek, Roland K. Seager, Sara Fausnaugh, Michael Glidden, Ana Guerrero, Natalia |
| author_sort | Daylan, Tansu |
| collection | MIT |
| description | The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 ± 11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observations of other hot Jupiters (WASP-6b, 18b, and 46b) are compatible with a constant period, ruling out an 81.6 s offset at the 6.4σ level. The 1.3 day orbital period of WASP-4b appears to be decreasing at a rate of ms per year. The apparent period change might be caused by tidal orbital decay or apsidal precession, although both interpretations have shortcomings. The gravitational influence of a third body is another possibility, though at present there is minimal evidence for such a body. Further observations are needed to confirm and understand the timing variation. ©2019 |
| first_indexed | 2024-09-23T10:03:14Z |
| format | Article |
| id | mit-1721.1/124720 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:03:14Z |
| publishDate | 2020 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1247202022-09-30T18:36:39Z WASP-4b arrived early for the TESS mission Daylan, Tansu Villasenor, Jesus Noel Samonte Ricker, George R. Vanderspek, Roland K. Seager, Sara Fausnaugh, Michael Glidden, Ana Guerrero, Natalia Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences MIT Kavli Institute for Astrophysics and Space Research The Transiting Exoplanet Survey Satellite (TESS) recently observed 18 transits of the hot Jupiter WASP-4b. The sequence of transits occurred 81.6 ± 11.7 s earlier than had been predicted, based on data stretching back to 2007. This is unlikely to be the result of a clock error, because TESS observations of other hot Jupiters (WASP-6b, 18b, and 46b) are compatible with a constant period, ruling out an 81.6 s offset at the 6.4σ level. The 1.3 day orbital period of WASP-4b appears to be decreasing at a rate of ms per year. The apparent period change might be caused by tidal orbital decay or apsidal precession, although both interpretations have shortcomings. The gravitational influence of a third body is another possibility, though at present there is minimal evidence for such a body. Further observations are needed to confirm and understand the timing variation. ©2019 2020-04-17T15:04:17Z 2020-04-17T15:04:17Z 2019-06 2018-12 2020-04-09T14:29:04Z Article http://purl.org/eprint/type/JournalArticle 1538-3881 https://hdl.handle.net/1721.1/124720 Bouma, L.G., et al., "WASP-4b arrived early for the TESS mission." Astronomical journal 157, 6 (June 2019): no. 217 doi 10.3847/1538-3881/AB189F ©2019 Author(s) en 10.3847/1538-3881/AB189F 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 Villasenor, Jesus Noel Samonte Ricker, George R. Vanderspek, Roland K. Seager, Sara Fausnaugh, Michael Glidden, Ana Guerrero, Natalia WASP-4b arrived early for the TESS mission |
| title | WASP-4b arrived early for the TESS mission |
| title_full | WASP-4b arrived early for the TESS mission |
| title_fullStr | WASP-4b arrived early for the TESS mission |
| title_full_unstemmed | WASP-4b arrived early for the TESS mission |
| title_short | WASP-4b arrived early for the TESS mission |
| title_sort | wasp 4b arrived early for the tess mission |
| url | https://hdl.handle.net/1721.1/124720 |
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