OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS
The stellar obliquity of a transiting planetary system can be constrained by combining measurements of the star's rotation period, radius, and projected rotational velocity. Here, we present a hierarchical Bayesian technique for recovering the obliquity distribution of a population of transitin...
| Main Authors: | , |
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| Format: | Article |
| Language: | en_US |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/92942 https://orcid.org/0000-0002-4265-047X |
| _version_ | 1811097459478233088 |
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| author | Morton, Timothy D. Winn, Joshua Nathan |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Morton, Timothy D. Winn, Joshua Nathan |
| author_sort | Morton, Timothy D. |
| collection | MIT |
| description | The stellar obliquity of a transiting planetary system can be constrained by combining measurements of the star's rotation period, radius, and projected rotational velocity. Here, we present a hierarchical Bayesian technique for recovering the obliquity distribution of a population of transiting planetary systems and apply it to a sample of 70 Kepler objects of interest. With ≈95% confidence, we find that the obliquities of stars with only a single detected transiting planet are systematically larger than those with multiple detected transiting planets. This suggests that a substantial fraction of Kepler's single-transiting systems represent dynamically hotter, less orderly systems than the "pancake-flat" multiple-transiting systems. |
| first_indexed | 2024-09-23T16:59:52Z |
| format | Article |
| id | mit-1721.1/92942 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T16:59:52Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/929422022-09-29T22:57:29Z OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS Morton, Timothy D. Winn, Joshua Nathan Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Winn, Joshua Nathan The stellar obliquity of a transiting planetary system can be constrained by combining measurements of the star's rotation period, radius, and projected rotational velocity. Here, we present a hierarchical Bayesian technique for recovering the obliquity distribution of a population of transiting planetary systems and apply it to a sample of 70 Kepler objects of interest. With ≈95% confidence, we find that the obliquities of stars with only a single detected transiting planet are systematically larger than those with multiple detected transiting planets. This suggests that a substantial fraction of Kepler's single-transiting systems represent dynamically hotter, less orderly systems than the "pancake-flat" multiple-transiting systems. United States. National Aeronautics and Space Administration (Origins Program NNX11AG85G) United States. National Aeronautics and Space Administration (Kepler Participating Scientist Program (NNX14AE11G) United States. National Aeronautics and Space Administration (Kepler Participating Scientist Program (NNX12AC76G) National Science Foundation (U.S.) (Grant 1108595) 2015-01-16T17:09:28Z 2015-01-16T17:09:28Z 2014-11 2014-06 Article http://purl.org/eprint/type/JournalArticle 1538-4357 0004-637X http://hdl.handle.net/1721.1/92942 Morton, Timothy D., and Joshua N. Winn. “OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS.” The Astrophysical Journal 796, no. 1 (November 4, 2014): 47. © 2014 The American Astronomical Society https://orcid.org/0000-0002-4265-047X en_US http://dx.doi.org/10.1088/0004-637x/796/1/47 The Astrophysical 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 IOP Publishing American Astronomical Society |
| spellingShingle | Morton, Timothy D. Winn, Joshua Nathan OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS |
| title | OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS |
| title_full | OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS |
| title_fullStr | OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS |
| title_full_unstemmed | OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS |
| title_short | OBLIQUITIES OF KEPLER STARS: COMPARISON OF SINGLE- AND MULTIPLE-TRANSIT SYSTEMS |
| title_sort | obliquities of kepler stars comparison of single and multiple transit systems |
| url | http://hdl.handle.net/1721.1/92942 https://orcid.org/0000-0002-4265-047X |
| work_keys_str_mv | AT mortontimothyd obliquitiesofkeplerstarscomparisonofsingleandmultipletransitsystems AT winnjoshuanathan obliquitiesofkeplerstarscomparisonofsingleandmultipletransitsystems |