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The California planet survey. I. four new giant exoplanets

Howard, Andrew W. (author)
Johnson, John Asher (author)
Marcy, Geoffrey W. (author)
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Fischer, Debra A. (author)
Wright, Jason T. (author)
Bernat, David (author)
Henry, Gregory W. (author)
Peek, Kathryn M. G. (author)
Isaacson, Howard (author)
Apps, Kevin (author)
Endl, Michael (author)
Cochran, William D. (author)
Valenti, Jeff A. (author)
Anderson, Jay (author)
Piskunov, Nikolai E. (author)
Uppsala universitet,Institutionen för fysik och astronomi
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 (creator_code:org_t)
2010
2010
English.
In: Astrophysical Journal. - 0004-637X .- 1538-4357. ; 721:2, s. 1467-1481
Related links:
https://urn.kb.se/re...
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https://doi.org/10.1...
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • We present precise Doppler measurements of four stars obtained during the past decade at Keck Observatory by the California Planet Survey (CPS). These stars, namely, HD 34445, HD 126614, HD 13931, and Gl 179, all show evidence for a single planet in Keplerian motion. We also present Doppler measurements from the Hobby-Eberly Telescope (HET) for two of the stars, HD 34445 and Gl 179, that confirm the Keck detections and significantly refine the orbital parameters. These planets add to the statistical properties of giant planets orbiting near or beyond the ice line, and merit follow-up by astrometry, imaging, and space-borne spectroscopy. Their orbital parameters span wide ranges of planetary minimum mass (M sin i = 0.38-1.9 M-Jup), orbital period (P = 2.87-11.5 yr), semimajor axis (a = 2.1-5.2 AU), and eccentricity (e = 0.02-0.41). HD 34445 b (P = 2.87 yr, M sin i = 0.79 MJup, e = 0.27) is a massive planet orbiting an old, G-type star. We announce a planet, HD 126614 Ab, and an M dwarf, HD 126614 B, orbiting the metal-rich star HD 126614 (which we now refer to as HD 126614 A). The planet, HD 126614 Ab, has minimum mass M sin i = 0.38 MJup and orbits the stellar primary with period P = 3.41 yr and orbital separation a = 2.3 AU. The faint M dwarf companion, HD 126614 B, is separated from the stellar primary by 489 mas (33 AU) and was discovered with direct observations using adaptive optics and the PHARO camera at Palomar Observatory. The stellar primary in this new system, HD 126614 A, has the highest measured metallicity ([ Fe/ H] = + 0.56) of any known planet-bearing star. HD 13931 b (P = 11.5 yr, M sin i = 1.88 MJup, e = 0.02) is a Jupiter analog orbiting a near solar twin. Gl 179 b (P = 6.3 yr, M sin i = 0.82 M-Jup, e = 0.21) is a massive planet orbiting a faint M dwarf. The high metallicity of Gl 179 is consistent with the planet-metallicity correlation among M dwarfs, as documented recently by Johnson & Apps.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)

Keyword

binaries: visual
planetary systems
stars: individual (HD 34445
HD 126614
HD 24496
HD 13931
G1 179)
techniques: high angular resolution
techniques: photometric
techniques: radial velocities
Physics
Fysik

Publication and Content Type

ref (subject category)
art (subject category)

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