A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY
Transiting planets around rapidly rotating stars are not amenable to precise radial velocity observations, such as are used for planet candidate validation, as they have wide, rotationally broadened stellar lines. Such planets can, however, be observed using Doppler tomography, wherein stellar absor...
| 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/1721.1/93082 https://orcid.org/0000-0002-4265-047X |
| _version_ | 1811089733152931840 |
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| author | Johnson, Marshall C. Cochran, William D. Albrecht, Simon H. Dodson-Robinson, Sarah E. Gullikson, Kevin Winn, Joshua Nathan |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Johnson, Marshall C. Cochran, William D. Albrecht, Simon H. Dodson-Robinson, Sarah E. Gullikson, Kevin Winn, Joshua Nathan |
| author_sort | Johnson, Marshall C. |
| collection | MIT |
| description | Transiting planets around rapidly rotating stars are not amenable to precise radial velocity observations, such as are used for planet candidate validation, as they have wide, rotationally broadened stellar lines. Such planets can, however, be observed using Doppler tomography, wherein stellar absorption line profile distortions during transit are spectroscopically resolved. This allows the validation of transiting planet candidates and the measurement of the stellar spin-planetary orbit (mis)alignment, which is an important statistical probe of planetary migration processes. We present Doppler tomographic observations that provide direct confirmation of the hot Jupiter Kepler-13 Ab and also show that the planet has a prograde, misaligned orbit with λ = 58°.6 ± 2°.0. Our measured value of the spin–orbit misalignment is in significant disagreement with the value of λ = 23° ± 4° previously measured by Barnes et al. (2011) from the gravity-darkened Kepler light curve. We also place an upper limit of 0.75 M☉ (95% confidence) on the mass of Kepler-13 C, the spectroscopic companion to Kepler-13 B, which is the proper-motion companion of the planet host star Kepler-13 A. |
| first_indexed | 2024-09-23T14:23:50Z |
| format | Article |
| id | mit-1721.1/93082 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:23:50Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/930822022-09-29T09:11:21Z A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY Johnson, Marshall C. Cochran, William D. Albrecht, Simon H. Dodson-Robinson, Sarah E. Gullikson, Kevin Winn, Joshua Nathan Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Albrecht, Simon H. Winn, Joshua Nathan Transiting planets around rapidly rotating stars are not amenable to precise radial velocity observations, such as are used for planet candidate validation, as they have wide, rotationally broadened stellar lines. Such planets can, however, be observed using Doppler tomography, wherein stellar absorption line profile distortions during transit are spectroscopically resolved. This allows the validation of transiting planet candidates and the measurement of the stellar spin-planetary orbit (mis)alignment, which is an important statistical probe of planetary migration processes. We present Doppler tomographic observations that provide direct confirmation of the hot Jupiter Kepler-13 Ab and also show that the planet has a prograde, misaligned orbit with λ = 58°.6 ± 2°.0. Our measured value of the spin–orbit misalignment is in significant disagreement with the value of λ = 23° ± 4° previously measured by Barnes et al. (2011) from the gravity-darkened Kepler light curve. We also place an upper limit of 0.75 M☉ (95% confidence) on the mass of Kepler-13 C, the spectroscopic companion to Kepler-13 B, which is the proper-motion companion of the planet host star Kepler-13 A. National Science Foundation (U.S.) (Grant 1108595) United States. National Aeronautics and Space Administration (Origins Program) United States. National Aeronautics and Space Administration. Kepler Participating Scientist Program 2015-01-20T19:51:24Z 2015-01-20T19:51:24Z 2014-06 2014-03 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/93082 Johnson, Marshall C., William D. Cochran, Simon Albrecht, Sarah E. Dodson-Robinson, Joshua N. Winn, and Kevin Gullikson. “A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY.” The Astrophysical Journal 790, no. 1 (June 30, 2014): 30. © 2014 The American Astronomical Society. https://orcid.org/0000-0002-4265-047X en_US http://dx.doi.org/10.1088/0004-637X/790/1/30 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 | Johnson, Marshall C. Cochran, William D. Albrecht, Simon H. Dodson-Robinson, Sarah E. Gullikson, Kevin Winn, Joshua Nathan A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY |
| title | A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY |
| title_full | A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY |
| title_fullStr | A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY |
| title_full_unstemmed | A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY |
| title_short | A MISALIGNED PROGRADE ORBIT FOR KEPLER-13 Ab VIA DOPPLER TOMOGRAPHY |
| title_sort | misaligned prograde orbit for kepler 13 ab via doppler tomography |
| url | http://hdl.handle.net/1721.1/93082 https://orcid.org/0000-0002-4265-047X |
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