Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation
Abstract: We report on observations of the Rossiter-McLaughlin (RM) effect for the XO-3 exoplanetary system. The RM effect for the system was previously measured by two different groups, but their results were statistically inconsistent. To obtain a decisive result we observed two full transits of X...
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| Format: | Article |
| Language: | en_US |
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Astronomical Society of Japan
2013
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| Online Access: | http://hdl.handle.net/1721.1/76731 https://orcid.org/0000-0002-4265-047X |
| _version_ | 1826204907416322048 |
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| author | Hirano, Teruyuki Winn, Joshua Nathan Sato, Bunei Aoki, Wako Tamura, Motohide Taruya, Atsushi Suto, Yasushi |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Hirano, Teruyuki Winn, Joshua Nathan Sato, Bunei Aoki, Wako Tamura, Motohide Taruya, Atsushi Suto, Yasushi |
| author_sort | Hirano, Teruyuki |
| collection | MIT |
| description | Abstract: We report on observations of the Rossiter-McLaughlin (RM) effect for the XO-3 exoplanetary system. The RM effect for the system was previously measured by two different groups, but their results were statistically inconsistent. To obtain a decisive result we observed two full transits of XO-3b with the Subaru 8.2-m telescope. By modeling these data with a new and more accurate analytic formula for the RM effect, we find the projected spin-orbit angle to be λ=37.3 deg ± 3.0 deg, in good agreement with the previous finding by Winn et al. (2009). In addition, an offset of ~22 m/s[superscript -1] was observed between the two transit datasets. This offset could be a signal of a third body in the XO-3 system, a possibility that should be checked with future observations. We also attempt to search for a possible signature of the stellar differential rotation in the RM data for the first time, and put weak upper limits on the differential rotation parameters. |
| first_indexed | 2024-09-23T13:03:15Z |
| format | Article |
| id | mit-1721.1/76731 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:03:15Z |
| publishDate | 2013 |
| publisher | Astronomical Society of Japan |
| record_format | dspace |
| spelling | mit-1721.1/767312022-10-01T12:47:09Z Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation Hirano, Teruyuki Winn, Joshua Nathan Sato, Bunei Aoki, Wako Tamura, Motohide Taruya, Atsushi Suto, Yasushi Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Hirano, Teruyuki Winn, Joshua Nathan Abstract: We report on observations of the Rossiter-McLaughlin (RM) effect for the XO-3 exoplanetary system. The RM effect for the system was previously measured by two different groups, but their results were statistically inconsistent. To obtain a decisive result we observed two full transits of XO-3b with the Subaru 8.2-m telescope. By modeling these data with a new and more accurate analytic formula for the RM effect, we find the projected spin-orbit angle to be λ=37.3 deg ± 3.0 deg, in good agreement with the previous finding by Winn et al. (2009). In addition, an offset of ~22 m/s[superscript -1] was observed between the two transit datasets. This offset could be a signal of a third body in the XO-3 system, a possibility that should be checked with future observations. We also attempt to search for a possible signature of the stellar differential rotation in the RM data for the first time, and put weak upper limits on the differential rotation parameters. United States. National Aeronautics and Space Administration (NNX11AG85G) 2013-02-05T19:36:55Z 2013-02-05T19:36:55Z 2011-12 2011-10 Article http://purl.org/eprint/type/JournalArticle 0004-6264 http://hdl.handle.net/1721.1/76731 Hirano, Teruyuki et al. “Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation.” Publications of the Astronomical Society of Japan 63 (2011): L57–L61. https://orcid.org/0000-0002-4265-047X en_US http://arxiv.org/abs/1108.4493 Publications of the Astronomical Society of Japan Creative Commons Attribution-Noncommercial-Share Alike 3.0 http://creativecommons.org/licenses/by-nc-sa/3.0/ application/pdf Astronomical Society of Japan arXiv |
| spellingShingle | Hirano, Teruyuki Winn, Joshua Nathan Sato, Bunei Aoki, Wako Tamura, Motohide Taruya, Atsushi Suto, Yasushi Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation |
| title | Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation |
| title_full | Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation |
| title_fullStr | Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation |
| title_full_unstemmed | Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation |
| title_short | Further Observations of the Tilted Planet XO-3: A New Determination of Spin-Orbit Misalignment, and Limits on Differential Rotation |
| title_sort | further observations of the tilted planet xo 3 a new determination of spin orbit misalignment and limits on differential rotation |
| url | http://hdl.handle.net/1721.1/76731 https://orcid.org/0000-0002-4265-047X |
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