THE CALIFORNIA PLANET SURVEY. I. FOUR NEW GIANT EXOPLANETS

By Andrew W. Howard, John A. Johnson, Geoffrey W. Marcy, Debra A. Fischer, Jason T. Wright, D. Bernat, Gregory W. Henry, Kathryn M. G. Peek, H. Isaacson, K. Apps and 5 more. 2010

242 citations recorded by the source corpus.

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 MJup), 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 MJup, 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.

Subfields: Astronomy and Astrophysics, Education, Instrumentation

View Paper: https://www.semanticscholar.org/paper/301f15f9d0c8f3918a0b2eef92a35fbbead750af

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Astronomy and Astrophysics

In Education

In Instrumentation

Citations in the corpus

State of the Field: Extreme Precision Radial Velocities (2016, background): “This strategy improves the observing cadence for several programs, including the California Planet Search (CPS; Howard et al. 2010), the N2K (“next 2000”) search for gas giant planets around metal rich stars (Fischer et al. 2005), a search for planets orbiting subgiants (Johnson et al. 2007) and…”
CHARACTERIZING THE COOL KOIs. III. KOI 961: A SMALL STAR WITH LARGE PROPER MOTION AND THREE SMALL PLANETS (2012, methodology): “For the background transiting planet hypothesis (BGpl), we assume an overall 40% occurrence rate for planets with periods < 50 days (Howard et al. 2010, 2011; Bonfils et al. 2011), and an average transit probability of 0.13 (corresponding to a planet orbiting a 0.5 R⊙ star in a 1.2 day period),…”
EXTRACTING RADIAL VELOCITIES OF A- AND B-TYPE STARS FROM ECHELLE SPECTROGRAPH CALIBRATION SPECTRA (2015, methodology): “…and development of high–resolution spectrographs equipped with digital detectors (Campbell et al. 1981), including HIRES at Keck (Vogt et al. 1994; Howard et al. 2010); and particularly with the construction of environmentally-stabilized spectrometers such as the HARPS-South and -North…”
Limits on Planetary Companions from Doppler Surveys of Nearby Stars (2016, methodology): “(A color version of this figure is available in the online journal.) identifying the nearby stars that are likely targets of Exo-C, Exo-S, and WFIRST-AFTA and that have historical Doppler measurements at Lick Observatory and Keck Observatory taken by the California Planet Survey (Howard et al. 2010a”
PLANET HUNTERS: A TRANSITING CIRCUMBINARY PLANET IN A QUADRUPLE STAR SYSTEM (2012, methodology): “These observations were taken with the standard setup used by the California Planet Survey (CPS) (Howard et al. 2010; Chubak et al. 2012) with a typical resolution of R ∼55,000 covering 3642 to 7990 Å.”
CHARACTERIZING THE COOL KOIs. VII. REFINED PHYSICAL PROPERTIES OF THE TRANSITING BROWN DWARF LHS 6343 C (2014, methodology): “The first four observations were obtained using a 45 minute exposure time and the standard iodine-cell setup described by Howard et al. (2010).”
METALLICITY AND TEMPERATURE INDICATORS IN M DWARF K-BAND SPECTRA: TESTING NEW AND UPDATED CALIBRATIONS WITH OBSERVATIONS OF 133 SOLAR NEIGHBORHOOD M DWARFS (2011, unknown): “…(Bonfils et al. 2005b), Gl 849 (Butler et al. 2006), Gl 176 (Forveille et al. 2009), GJ 1214 (Charbonneau et al. 2009), Gl 649 (Johnson et al. 2010), HIP 57050 (aka GJ 1148, Haghighipour et al. 2010), HIP 79431 (Apps et al. 2010), Gl 179 (Howard et al. 2010), and HIP 12961 (Forveille et al. 2011).”
Precision Stellar Characterization of FGKM Stars using an Empirical Spectral Library (2017, background): “For information about CPS and its goals, see Howard et al. (2010).”
DISCOVERY AND VALIDATION OF Kepler-452b: A 1.6 R⨁ SUPER EARTH EXOPLANET IN THE HABITABLE ZONE OF A G2 STAR (2015, methodology): “We used the standard setup of the California Planet Search (Howard et al. 2010) without the iodine cell, resulting in a spectral resolution of 60,000, and S/N, at 5500 Å, of 40 per pixel.”
The California-Kepler Survey. I. High-resolution Spectroscopy of 1305 Stars Hosting Kepler Transiting Planets (2017, background): “Metallicities of Kepler Planet Hosts (Petigura et al., to be submitted) CKS V. Stellar and Planetary Properties of Kepler Multiplanet Systems (Weiss et al., to be submitted) Related Papers Using CKS Data Detection of Stars Within ∼0.8′′of Kepler Objects of Interest (Kolbl et al. 2015) Absence of a M”
CHARACTERIZING THE COOL KOIs. II. THE M DWARF KOI-254 AND ITS HOT JUPITER (2011, methodology): “Keck/HIRES Velocimetry We obtained spectroscopic observations of KOI-254 at Keck Observatory using the HIgh-Resolution Echelle Spectrometer (HIRES) with the standard iodine-cell setup used by the California Planet Survey (Howard et al. 2010).”
SPECTRAL PROPERTIES OF COOL STARS: EXTENDED ABUNDANCE ANALYSIS OF 1,617 PLANET-SEARCH STARS (2016, methodology): “Sample Description The spectra in this study were all collected using the HIRES spectrograph on the Keck I telescope as part of one or more radial velocity planet-search programs under the collaborative umbrella known as the California Planet Survey (CPS).”