The oblique orbit of the super-Neptune HAT-P-11b
Open accessAbstract
We find the orbit of the Neptune-sized exoplanet HAT-P-11b to be highly inclined relative to the equatorial plane of its host star. This conclusion is based on spectroscopic observations of two transits, which allowed the Rossiter–McLaughlin effect to be detected with an amplitude of 1.5 m s −1 . The sky-projected obliquity is 103 +26 −10 deg. This is the smallest exoplanet for which spin–orbit alignment has been measured. The result favors a migration scenario involving few-body interactions followed by tidal dissipation. This finding also conforms with the pattern that the systems with the weakest tidal interactions have the widest spread in obliquities. We predict that the high obliquity of HAT-P-11 will be manifest in transit light curves from the Kepler spacecraft: starspot-crossing anomalies will recur at most once per stellar rotation period, rather than once per orbital period as they would for a well-aligned system.
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Exoplanetary systems around sun-like stars generically exhibit a very broad range of spin-orbit misalignments, with projected stellar obliquities ranging from 0 to 180 deg.
“Over the last decade, observations of the Rossiter-McLaughlin e ect (see for example Winn et al. 2010; Triaud 2017) and doppler tomography (e.g., Marsh 2001; Johnson et al. 2017) have revealed that exoplanetary systems around sun-like stars generically exhibit a very broad range of spinorbit misalignments, with projected stellar obliquities ranging from 0 to 180 deg.”
From The planet nine hypothesis (2019) · cites this paper as Winn et al. 2010
Cites
Kepler planet-detection mission: Introduction and first results
Borucki, W. J., Koch, D., Basri, G., Batalha, N., Brown, T., Caldwell, D., Caldwell, J., Christensen-Dalsgaard, J., Cochran, W. D., DeVore, E., et al. (2010) · Science · doi:10.1126/science.1185402 · Cited by 4,035 · see citing works
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Batygin, K., Adams, F. C., Brown, M. E., & Becker, J. C. (2019) · Physics Reports · doi:10.1016/j.physrep.2019.01.009 · Cited by 181 · see citing works
“Over the last decade, observations of the Rossiter-McLaughlin effect (see for example Winn et al. 2010; Triaud 2017) and doppler tomography (e.g., Marsh 2001; Johnson et al. 2017) have revealed that exoplanetary systems around sun-like stars generically exhibit a very broad range of spinorbit…”
BackgroundDetection of the Rossiter–McLaughlin effect in the 2012 June 6 Venus transit
Molaro, P., Monaco, L., Barbieri, M., & Zaggia, S. (2013) · Monthly Notices of the Royal Astronomical Society: Letters · doi:10.1093/mnrasl/sls027 · Cited by 21 · see citing works
- Authors
- Winn, J. N., Johnson, J. A., Howard, A. W., Marcy, G. W., Isaacson, H., Shporer, A., Á. Bakos, G., Hartman, J. D., & Albrecht, S.
- Affiliations
- Massachusetts Institute of Technology (US)
- California Institute of Technology (US)
- Space Sciences Laboratory (US)
- Las Cumbres Observatory Global Telescope Network (US)
- Center for Astrophysics Harvard & Smithsonian (US)
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2010-10-20
- Volume
- 723
- Issue
- 2
- Pages
- L223-L227
- ISSN
- 2041-8205 (ISSN-L)
- 2041-8213
- OpenAlex
- W1992258122
- Cited by
- 172
- References
- 1
- Citations by year
- 2026: 2 · 2025: 7 · 2024: 6 · 2023: 4 · 2022: 5 · 2021: 6 · 2020: 10 · 2019: 10 · 2018: 33 · 2017: 8 · 2016: 10 · 2015: 8 · 2014: 17 · 2013: 10 · 2012: 15
- FWCI
- 8.22
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- The Astrophysical Journal Letters (publishedVersion)
- arXiv (Cornell University) (submittedVersion)
- CaltechAUTHORS (California Institute of Technology) (submittedVersion)
- arXiv (Cornell University)
- Funders
- National Science Foundation (0702843)
- National Aeronautics and Space Administration (NNX09AD36G, NNX08AF23G)
- W. M. Keck Foundation
- California Institute of Technology
- Topics
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
- Physical Sciences › Physics and Astronomy › Instrumentation › Astronomy and Astrophysical Research
- Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › History and Developments in Astronomy
- Keywords
- HAT-P-11b, super-Neptune, orbital obliquity, spin-orbit misalignment, Rossiter-McLaughlin effect, exoplanet transits, tidal dissipation, planet migration, stellar rotation, transit light curves, Kepler
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