The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7
We present an analysis of the early Kepler observations of the previously discovered transiting planet HAT-P-7b. The light curve shows the transit of the star, the occultation of the planet, and the orbit phase-dependent light from the planet. In addition, phase-dependent light from the star is pres...
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2012
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| Online Access: | http://hdl.handle.net/1721.1/74057 https://orcid.org/0000-0002-6892-6948 |
| _version_ | 1826197441730314240 |
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| author | Seager, Sara Welsh, William F. Orosz, Jerome A. Fortney, Jonathan J. Jenkins, Jon M. Rowe, Jason F. Koch, David Borucki, William J. |
| 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 Seager, Sara Welsh, William F. Orosz, Jerome A. Fortney, Jonathan J. Jenkins, Jon M. Rowe, Jason F. Koch, David Borucki, William J. |
| author_sort | Seager, Sara |
| collection | MIT |
| description | We present an analysis of the early Kepler observations of the previously discovered transiting planet HAT-P-7b. The light curve shows the transit of the star, the occultation of the planet, and the orbit phase-dependent light from the planet. In addition, phase-dependent light from the star is present, known as "ellipsoidal variations." The very nearby planet (only four stellar radii away) gravitationally distorts the star and results in a flux modulation twice per orbit. The ellipsoidal variations can confuse interpretation of the planetary phase curve if not self-consistently included in the modeling. We fit the light curve using the Roche potential approximation and derive improved planet and orbit parameters. |
| first_indexed | 2024-09-23T10:47:43Z |
| format | Article |
| id | mit-1721.1/74057 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T10:47:43Z |
| publishDate | 2012 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/740572022-09-27T15:03:14Z The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 Seager, Sara Welsh, William F. Orosz, Jerome A. Fortney, Jonathan J. Jenkins, Jon M. Rowe, Jason F. Koch, David Borucki, William J. Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences Seager, Sara We present an analysis of the early Kepler observations of the previously discovered transiting planet HAT-P-7b. The light curve shows the transit of the star, the occultation of the planet, and the orbit phase-dependent light from the planet. In addition, phase-dependent light from the star is present, known as "ellipsoidal variations." The very nearby planet (only four stellar radii away) gravitationally distorts the star and results in a flux modulation twice per orbit. The ellipsoidal variations can confuse interpretation of the planetary phase curve if not self-consistently included in the modeling. We fit the light curve using the Roche potential approximation and derive improved planet and orbit parameters. 2012-10-17T19:37:29Z 2012-10-17T19:37:29Z 2010-03 2009-11 Article http://purl.org/eprint/type/JournalArticle 2041-8205 2041-8213 http://hdl.handle.net/1721.1/74057 Welsh, William F. et al. “The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7.” The Astrophysical Journal 713.2 (2010): L145–L149. © 2012 IOP Publishing https://orcid.org/0000-0002-6892-6948 en_US http://dx.doi.org/ 10.1088/2041-8205/713/2/l145 Astrophysical Journal. Letters 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 IOP Publishing IOP |
| spellingShingle | Seager, Sara Welsh, William F. Orosz, Jerome A. Fortney, Jonathan J. Jenkins, Jon M. Rowe, Jason F. Koch, David Borucki, William J. The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 |
| title | The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 |
| title_full | The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 |
| title_fullStr | The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 |
| title_full_unstemmed | The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 |
| title_short | The Discovery of Ellipsoidal Variations in the Kepler Light Curve of Hat-P-7 |
| title_sort | discovery of ellipsoidal variations in the kepler light curve of hat p 7 |
| url | http://hdl.handle.net/1721.1/74057 https://orcid.org/0000-0002-6892-6948 |
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