An Eccentric Hot Jupiter Orbiting the Subgiant HD 185269
Abstract
We report the detection of a Jupiter-mass planet in a 6.838 day orbit around the 1.28 M_☉ subgiant HD 185269. The eccentricity of HD 185269b (e = 0.30) is unusually large compared to other planets within 0.1 AU of their stars. Photometric observations demonstrate that the star is constant to ±0.0001 mag on the radial velocity period, strengthening our interpretation of a planetary companion. This planet was detected as part of our radial velocity survey of evolved stars located on the subgiant branch of the H-R diagram—also known as the Hertzsprung gap. These stars, which have masses between 1.2 and 2.5 M_☉, play an important role in the investigation of the frequency of extrasolar planets as a function of stellar mass.
Additional Information
© 2006 American Astronomical Society. Received 2006 July 4; accepted 2006 August 3. We extend our gratitude to the many CATobservers who have helped with this project, including Shannon Patel, Julia Kregenow, Karin Sandstrom, Katie Peek and Bernie Walp. Special thanks to Conor Laver and Franck Marchis for lending a portion of their 3 m time to observe this star before it set in 2005. We also gratefully acknowledge the efforts and dedication of the Lick Observatory staff. We appreciate funding from NASA grant NNG05GK92G (to G.W.M.) for supporting this research. D. A. F. is a Cottrell Science Scholar of Research Corporation and acknowledges support from NASA grant NNG05G164G that made this work possible. G.W. H. acknowledges support from NASA grant NCC5-511 and NSF grant HRD-9706268.Attached Files
Published - 0004-637X_652_2_1724.pdf
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Additional details
- Eprint ID
- 36182
- Resolver ID
- CaltechAUTHORS:20130104-141035863
- NASA
- NNG05GK92G
- NASA
- NNG05G164G
- NASA
- NCC5-511
- NSF
- HRD-9706268
- Created
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2013-01-04Created from EPrint's datestamp field
- Updated
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2021-11-09Created from EPrint's last_modified field