A Planetary Mass Companion to the K0 Giant HD 17092

Abstract

We report the discovery of a substellar-mass companion to the K0-giant HD 17092 with the Hobby-Eberly Telescope. In the absence of any correlation of the observed 360-day periodicity with the standard indicators of stellar activity, the observed radial velocity variations are most plausibly explained in terms of a Keplerian motion of a planetary-mass body around the star. With the estimated stellar mass of 2.3Msun, the minimum mass of the planet is 4.6MJ. The planet's orbit is characterized by a mild eccentricity of e=0.17 and a semi-major axis of 1.3 AU. This is the tenth published detection of a planetary companion around a red giant star. Such discoveries add to our understanding of planet formation around intermediate-mass stars and they provide dynamical information on the evolution of planetary systems around post-main sequence stars.

arXiv comment13 pages, 3 figures, 2 tables. Submitted to ApJ

References in corpus (22)

• Evolutionary tracks and isochrones for low- and intermediate-mass stars: from 0.15 to 7 M_sun, and from Z=0.0004 to 0.03
• Disk Frequencies and Lifetimes in Young Clusters
• Catalog of Nearby Exoplanets
• No planet for HD 166435
• Are There Unstable Planetary Systems Around White Dwarfs?
• Observed Properties of Exoplanets: Masses, Orbits, and Metallicities
• A Planetary Companion to gamma Cephei A
• A Debris Disk Around An Isolated Young Neutron Star
• Evidence for Mass-dependent Circumstellar Disk Evolution in the 5 Myr-old Upper Scorpius OB Association
• Formation of giant planets by fragmentation of protoplanetary disks
• Migration and giant planet formation
• Ten Year Review of Queue Scheduling of the Hobby-Eberly Telescope
• Confirmation of the Planet Hypothesis for the Long-period Radial Velocity Variations of Beta Geminorum
• Evidence for Planet-Planet Scattering in Upsilon Andromedae
• Masses and orbital inclinations of planets in the PSR B1257+12 system
• A substellar companion around the intermediate-mass giant star HD 11977
• Precise Radial Velocities of Giant Stars II. Pollux and its Planetary Companion
• Discovery of a planet around the K giant star 4 UMa
• Further evidence for the planet around 51 Pegasi
• Hipparcos and the Age of the Galactic Disc
• Bisectors of the cross-correlation function applied to stellar spectra. Discriminating stellar activity, oscillations and planets
• Discovery of fourteen new ZZ Cetis with SOAR

Cited by in corpus (69)

• A New Planet Around an M Dwarf: Revealing a Correlation Between Exoplanets and Stellar Mass
• The Orbital Evolution of Gas Giant Planets around Giant Stars
• A Low-Mass Planet with a Possible Sub-Stellar-Mass Host in Microlensing Event MOA-2007-BLG-192
• Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity
• A High Contrast Imaging Survey of SIM Lite Planet Search Targets
• Retired A Stars and Their Companions. III. Comparing the Mass-Period Distributions of Planets Around A-Type Stars and Sun-Like Stars
• Transit Lightcurves of Extrasolar Planets Orbiting Rapidly-Rotating Stars
• Double-blind test program for astrometric planet detection with Gaia
• Stellar parameters and chemical abundances of 223 evolved stars with and without planets
• Planet Engulfment by ~1.5-3 Solar-Mass Red Giants
• Extrasolar Giant Planets and X-ray Activity
• Extrasolar planets and brown dwarfs around A-F type stars VI. High precision RV survey of early type dwarfs with HARPS
• Planetary Companions around Three Intermediate-Mass G and K Giants: 18 Del, xi Aql, and HD 81688
• A Keck HIRES Doppler Search for Planets Orbiting Metal-Poor Dwarfs. II. On the Frequency of Giant Planets in the Metal-Poor Regime
• Substellar-mass companions to the K-dwarf BD +14 4559 and the K-giants HD 240210 and BD +20 2457
• Retired A Stars and Their Companions II: Jovian planets orbiting kappa Coronae Borealis and HD167042
• Spitzer IRAC Observations of White Dwarfs. II. Massive Planetary and Cold Brown Dwarf Companions to Young and Old Degenerates
• The metallicity signature of evolved stars with planets
• Metallicities for 13 nearby open clusters from high-resolution spectroscopy of dwarf and giant stars. Stellar metallicity, stellar mass, and giant planets
• Precise radial velocities of giant stars. IV. A correlation between surface gravity and radial velocity variation and a statistical investigation of companion properties
• A Substellar Companion to the Intermediate-Mass Giant 11 Com
• Metallicities of Planet Hosting Stars: A Sample of Giants and Subgiants
• Substellar-Mass Companions to the K-Giants HD 240237, BD +48 738 and HD 96127
• Planetary Companions to Evolved Intermediate-Mass Stars: 14 Andromedae, 81 Ceti, 6 Lyncis, and HD 167042
• Planetary-mass companions to the K-giants BD+15 2940 and HD 233604
• A Planet in a 0.6-AU Orbit Around the K0 Giant HD 102272
• Planetary companions around the K giant stars 11 UMi and HD 32518
• Interferometric diameters of five evolved intermediate-mass planet-hosting stars measured with PAVO at the CHARA Array
• Homogeneous spectroscopic parameters for bright planet host stars from the northern hemisphere
• The Penn State - Torun Centre for Astronomy Planet Search stars. II. Lithium abundance analysis of the Red Giant Clump sample
• Precise radial velocities of giant stars XVI. Planet occurrence rates from the combined analysis of the Lick, EXPRESS, and PPPS giant star surveys
• The Physical Parameters of the Retired A Star HD185351
• Planetary companion candidates around the K giant stars 42 Dra and HD 139357
• Three red giants with substellar-mass companions
• The Penn State-Torun Centre for Astronomy Planet Search stars. I. Spectroscopic analysis of 348 red giants
• Young Exoplanet Transit Initiative (YETI)
• Precise radial velocities of giant stars V. A brown dwarf and a planet orbiting the K giant stars tau Gem and 91 Aqr
• Tracking Advanced Planetary Systems with HARPS-N (TAPAS). I. A multiple planetary system around the red giant star TYC 1422-614-1
• The Penn State - Toruń Centre for Astronomy Planet Search stars IV. Dwarfs and the complete sample
• Precise radial velocities of giant stars VI. A possible 2:1 resonant planet pair around the K giant star $\eta$ Cet
• A Massive Substellar Companion to the Massive Giant HD 119445
• TAPAS IV. TYC 3667-1280-1 b - the most massive red giant star hosting a warm Jupiter
• Tracking Advanced Planetary Systems (TAPAS) with HARPS-N. VI. HD 238914 and TYC 3318-01333-1 - two more Li-rich giants with planets
• Planets around the evolved stars 24 Booties and $\gamma$ Libra: A 30d-period planet and a double giant-planet system in possible 7:3 MMR
• The Active Chromospheres of Lithium-Rich Red Giant Stars
• Precise radial velocities of giant stars. XI. Two brown dwarfs in 6:1 mean motion resonance around the K giant star $\nu$ Ophiuchi
• SPECIES II. Stellar parameters of the EXPRESS program giant star sample
• Metallicities for 6 nearby open clusters from high-resolution spectra of giant stars. [Fe/H] values for a planet search sample
• Radio Emissions from Substellar Companions of Evolved Cool Stars
• Four Jovian planets around low-luminosity giant stars observed by the EXPRESS and PPPS
• Extrasolar planets and brown dwarfs around A-F type stars - VII. Theta Cygni radial velocity variations: planets or stellar phenomenon?
• CORALIE radial-velocity search for companions around evolved stars (CASCADES). I. Sample definition and first results: Three new planets orbiting giant stars
• Detection and Characterization of Extrasolar Planets through Doppler Spectroscopy
• A Possible Substellar Companion to the Intermediate-mass Giant HD 175679
• Detection of an exoplanet around the evolved K giant HD 66141
• Exclusion of Stellar Companions to Exoplanet Host Stars
• Regular Radial Velocity Variations in Nine G- and K-type Giant Stars: Eight Planets and One Planet Candidate
• HD 76920b pinned down: a detailed analysis of the most eccentric planetary system around an evolved star
• Tracking Advanced Planetary Systems (TAPAS) with HARPS-N. III. HD 5583 and BD+15 2375 - two cool giants with warm companions
• Masses and luminosities for 342 stars from the PennState-Toruń Centre for Astronomy Planet Search
• A HET search for planets around evolved stars
• Tracking Advanced Planetary Systems (TAPAS) with HARPS-N. V.: A Massive Jupiter orbiting the very low metallicity giant star BD+03 2562 and a possible planet around HD~103485
• Tracking Advanced Planetary Systems (TAPAS) with HARPS-N VII. Elder suns with low-mass companions
• The modulation of SiO maser polarization by Jovian planets
• Taxonomy of the extrasolar planet
• Is there a metallicity enhancement in planet hosting red giants?
• Search for Exoplanets around Northern Circumpolar Stars- II. The Detection of Radial Velocity Variations in M Giant Stars HD 36384, HD 52030, and HD 208742
• PTPS Candidate Exoplanet Host Star Radii Determination with CHARA Array
• 3D models of the circumstellar environments of evolved stars: Formation of multiple spiral structures