A Caltech Library Service

Five Intermediate-Period Planets from the N2K Sample

Fischer, Debra A. and Vogt, Steven S. and Marcy, Geoffrey W. and Butler, R. Paul and Sato, Bun'ei and Henry, Gregory W. and Robinson, Sarah and Laughlin, Gregory and Ida, Shigeru and Toyota, Eri and Omiya, Masashi and Driscoll, Peter and Takeda, Genya and Wright, Jason T. and Johnson, John A. (2007) Five Intermediate-Period Planets from the N2K Sample. Astrophysical Journal, 669 (2). pp. 1336-1344. ISSN 0004-637X. doi:10.1086/521869.

PDF - Published Version
See Usage Policy.


Use this Persistent URL to link to this item:


We report the detection of five Jovian-mass planets orbiting high-metallicity stars. Four of these stars were first observed as part of the N2K program, and exhibited low rms velocity scatter after three consecutive observations. However, follow-up observations over the last 3 years now reveal the presence of longer period planets with orbital periods ranging from 21 days to a few years. HD 11506 is a G0 V star with a planet of M sin i = 4.74 M_(Jup) in a 3.85 yr orbit. HD 17156 is a G0 V star with a 3.12 M_(Jup) planet in a 21.2 day orbit. The eccentricity of this orbit is 0.67, one of the highest known for a planet with a relatively short period. The orbital period for this planet places it in a region of parameter space where relatively few planets have been detected. HD 125612 is a G3 V star with a planet of M sin i = 3.5 M_(Jup) in a 1.4 yr orbit. HD 170469 is a G5 IV star with a planet of M sin i = 0.67 M_(Jup) in a 3.13 year orbit. HD 231701 is an F8 V star with planet of 1.08 M_(Jup) in a 142 day orbit. All of these stars have supersolar metallicity. Three of the five stars were observed photometrically, but showed no evidence of brightness variability. A transit search conducted for HD 17156 was negative, but covered only 25% of the search space, and so is not conclusive.

Item Type:Article
Related URLs:
URLURL TypeDescription
Fischer, Debra A.0000-0003-2221-0861
Marcy, Geoffrey W.0000-0002-2909-0113
Henry, Gregory W.0000-0003-4155-8513
Laughlin, Gregory0000-0002-3253-2621
Wright, Jason T.0000-0001-6160-5888
Johnson, John A.0000-0001-9808-7172
Additional Information:© 2007 American Astronomical Society. Received 2007 March 31; accepted 2007 April 9. Based on observations obtained at the W. M. Keck Observatory, which is operated by the University of California and the California Institute of Technology. Keck time has been granted by NOAO and NASA. Based on observations obtained at the Subaru Telescope, which is operated by the National Astronomical Observatory of Japan. We gratefully acknowledge the dedication and support of the Keck Observatory staff, in particular Grant Hill for support with HIRES. We thank Akito Tajitsu and Tae-Soo Pyo for their expertise and support of the Subaru Hawaii Deep Survey observations. D. A. F. acknowledges support from NASA grant NNG05G164G and from Research Corporation. S. S. V. acknowledges support from NSFAST-0307493. B. S. is supported by Grants-in-Aid for Scientific Research (grant 17740106) from the Japan Society for the Promotion of Science (JSPS). We thank the Michelson Science Center for travel support through the KPDA program. We thank the NASA and UC Telescope assignment committees for generous allocations of telescope time. The authors extend thanks to those of Hawaiian ancestry on whose sacred mountain of Mauna Kea we are privileged to be guests. Without their kind hospitality, the Keck observations presented here would not have been possible. This research has made use of the SIMBAD database, operated at CDS, Strasbourg, France, and of NASA’s Astrophysics Data System Bibliographic Services and ismade possible by the generous support of Sun Microsystems, NASA, and the NSF.
Funding AgencyGrant Number
Research CorporationUNSPECIFIED
Japan Society for the Promotion of Science (JSPS)17740106
Sun MicrosystemsUNSPECIFIED
Issue or Number:2
Record Number:CaltechAUTHORS:20130109-091436236
Persistent URL:
Official Citation:Five Intermediate-Period Planets from the N2K Sample Debra A. Fischer et al. 2007 ApJ 669 1336
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:36262
Deposited By: Ruth Sustaita
Deposited On:09 Jan 2013 17:34
Last Modified:09 Nov 2021 23:21

Repository Staff Only: item control page