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The Jupiter Twin HD 154345b

Wright, J. T. and Marcy, G. W. and Butler, R. P. and Vogt, S. S. and Henry, G. W. and Isaacson, H. and Howard, A. W. (2008) The Jupiter Twin HD 154345b. Astrophysical Journal, 683 (1). L63-L66. ISSN 0004-637X.

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We announce the discovery of a twin of Jupiter orbiting the slightly metal-poor ([Fe/H] = − 0.1) nearby (d = 18 pc) G8 dwarf HD 154345. This planet has a minimum mass of 0.95 M_(Jup) and a 9.2 year, circular orbit with radius 4.2 AU. There is currently little or no evidence for other planets in the system, but smaller or exterior planets cannot yet be ruled out. We also detect a ~ 9 year activity cycle in this star photometrically and in chromospheric emission. We rule out activity cycles as the source of the radial velocity variations by comparison with other cycling late G dwarfs.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Wright, J. T.0000-0001-6160-5888
Marcy, G. W.0000-0002-2909-0113
Henry, G. W.0000-0003-4155-8513
Isaacson, H.0000-0002-0531-1073
Howard, A. W.0000-0001-8638-0320
Additional Information:© 2008 American Astronomical Society. Received 8 January 2008. Accepted 12 February 2008. Published 23 July 2008. We wish to recognize and acknowledge the very significant cultural role and reverence that the summit of Mauna Kea has always had within the indigenous Hawaiian community. We are most fortunate to have the opportunity to conduct observations from this mountain. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France, and of NASA’s Astrophysics Data System Bibliographic Services, and is made possible by the generous support of NASA and the NSF, including grant AST 03-07493.
Funding AgencyGrant Number
NSFAST 03-07493
Subject Keywords:planetary systems; techniques: radial velocities
Issue or Number:1
Record Number:CaltechAUTHORS:20170705-070651871
Persistent URL:
Official Citation:J. T. Wright et al 2008 ApJ 683 L63
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:78741
Deposited By: Ruth Sustaita
Deposited On:05 Jul 2017 22:10
Last Modified:09 Mar 2020 13:18

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