Year: 2010
Type: article
Abstract: 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 M Jup , 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 M Jup 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 M Jup , 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.
Source: The Astrophysical Journal
Authors: Andrew W. Howard, John Asher Johnson, Geoffrey W. Marcy, Debra A. Fischer, Jason T. Wright, David Bernat, Gregory W. Henry, Kathryn M. G. Peek, Howard Isaacson, Kevin Apps, Michael Endl, William D. Cochran, Jeff A. Valenti, Jay Anderson, Nikolai E. Piskunov
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
Awards: SEARCH FOR ROCKY PLANETS AROUND NEARBY STARS, THE MCDONALD OBSERVATORY PLANET SEARCH PROGRAM WE PROPOSE TO CONTINUE AND EXTEND THE MCDONALD OBSERVATORY PLANET SEARCH PROGRAM. THIS HIGH-PRECISION, OBSERVATORYTOWARD DISCOVERY OF SHORT-PERIODIC TERRESTRIAL PLANETS AND RARE JOVIAN-CLASS COMPANIONS T, Collaborative Research: Infrared Doppler Planet Search with Externally Dispersed Interferometry, Exploring the Relationship Between Stellar Mass and Planet Occurrence
OpenAlex ID: W2118317397