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The Detection of a Large-mass Planet Around a K0 IV Subgiant With an Almost-circular Orbit

Harakawa, Hiroki and Sato, Bun’ei and Fischer, Debra A. and Ida, Shigeru and Omiya, Masashi and Johnson, John A. and Marcy, Geoffrey W. and Toyota, Eri and Hori, Yasunori and Isaacson, Howard and Howard, Andrew W. and Peek, Kathryn M. G. (2009) The Detection of a Large-mass Planet Around a K0 IV Subgiant With an Almost-circular Orbit. In: Exoplanets and Disks: Their Formation and Diversity. AIP Conference Proceedings. No.1158. American Institute of Physics , Melville, NY, pp. 245-246. ISBN 978-0-7354-0695-7.

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We report the detection of a new large‐mass planet orbiting around a K0 IV(V = 8.26) star which has a minimum mass M_p sin i = 10.70 ± 0.50 M_(Jup) in a 696.0 ± 2.6‐day orbit. It was detected in precise radial velocity (RV) measurements from Subaru and Keck. The derived orbital parameters, based on a χ^2 which minimized by Downhill Simplex algorithm, suggests that these radial velocity variations are consistent with an almost circular planetary orbit and a Mars‐like semimajor axis (e ∼ 0.0, a  =  1.70 ± 0.03 AU). Extra‐solar planets that have several times the mass of Jupiter orbiting in periods of hundreds or thousands of days, with very low eccentricities( e< 0.1), are rare discoveries. Our detection presents a new sample of these circular orbit massive planets.

Item Type:Book Section
Related URLs:
URLURL TypeDescription
Harakawa, Hiroki0000-0002-6197-5544
Fischer, Debra A.0000-0003-2221-0861
Johnson, John A.0000-0001-9808-7172
Marcy, Geoffrey W.0000-0002-2909-0113
Hori, Yasunori0000-0003-4676-0251
Isaacson, Howard0000-0002-0531-1073
Howard, Andrew W.0000-0001-8638-0320
Additional Information:© 2009 American Institute of Physics.
Series Name:AIP Conference Proceedings
Issue or Number:1158
Record Number:CaltechAUTHORS:20170705-143928857
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Official Citation:The Detection of a Large‐mass Planet Around a K0 IV Subgiant With an Almost‐circular Orbit. Hiroki Harakawa, Bun’ei Sato, Debra A. Fischer, Shigeru Ida, Masashi Omiya, John A. Johnson, Geoffrey W. Marcy, Eri Toyota, Yasunori Hori, Howard Isaacson, Andrew W. Howard, and Kathryn M. G. Peekless. AIP Conference Proceedings 2009 1158:1, 245-246
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78773
Deposited By: Tony Diaz
Deposited On:05 Jul 2017 22:25
Last Modified:09 Mar 2020 13:18

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