Stellar Spin-Orbit Misalignment in a Multiplanet System
Abstract
Stars hosting hot Jupiters are often observed to have high obliquities, whereas stars with multiple coplanar planets have been seen to have low obliquities. This has been interpreted as evidence that hot-Jupiter formation is linked to dynamical disruption, as opposed to planet migration through a protoplanetary disk. We used asteroseismology to measure a large obliquity for Kepler-56, a red giant star hosting two transiting coplanar planets. These observations show that spin-orbit misalignments are not confined to hot-Jupiter systems. Misalignments in a broader class of systems had been predicted as a consequence of torques from wide-orbiting companions, and indeed radial velocity measurements revealed a third companion in a wide orbit in the Kepler-56 system.
Additional Information
© 2013 American Association for the Advancement of Science. Received for publication 18 June 2013; Accepted for publication 4 September 2013. We gratefully acknowledge the entire Kepler team for making this paper possible. Funding for the Kepler Mission is provided by NASA's Science Mission Directorate. We thank E. Agol and D. Raggozine for helpful comments on the manuscript. Supported by an appointment to the NASA Postdoctoral Program at Ames Research Center, administered by Oak Ridge Associated Universities through a contract with NASA (D.H.); a NSF Graduate Research Fellowship (K.M.D.); a NSF Graduate Research Fellowship under grant DGE1144469 (B.T.M.); the Netherlands Organisation for Scientific Research (S.H.); BELSPO for contract PRODEX COROT ( J.M.); the NASA Kepler Participating Scientist program (R.S.-O., J.N.W., and E.B.F.); NSF grant AST-1105930 (S.B.); and the David and Lucile Packard and Alfred P. Sloan foundations (J.A.J.). J.A.C. is a Hubble Fellow of the Harvard-Smithsonian Center for Astrophysics. Funding for the Stellar Astrophysics Centre is provided by Danish National Research Foundation grant DNRF106. The research is supported by the ASTERISK (Asteroseismic Investigations with SONG and Kepler) project funded by the European Research Council (grant agreement 267864).Attached Files
Submitted - 1310.4503v2.pdf
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Additional details
- Eprint ID
- 42357
- Resolver ID
- CaltechAUTHORS:20131111-140945270
- NASA Postdoctoral Program
- DGE-1144469
- NSF Graduate Research Fellowship
- Nederlandse Organisatie voor Wetenschappelijk Onderzoek (NWO)
- Belgian Federal Science Policy Office (BELSPO)
- AST-1105930
- NSF
- David and Lucile Packard Foundation
- Alfred P. Sloan Foundation
- DNRF106
- Danish National Research Foundation
- 267864 ASTERISK
- European Research Council (ERC)
- Created
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2013-11-12Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field