Independent validation of the temperate Super-Earth HD79211 b using HARPS-N

Abstract

We present high-precision radial velocities (RVs) from the HARPS-N spectrograph for HD79210 and HD79211, two M0V members of a gravitationally-bound binary system. We detect a planet candidate with a period of $24.421_{-0.017}^{+0.016}$ days around HD79211 in these HARPS-N RVs, validating the planet candidate originally identified in CARMENES RV data alone. Using HARPS-N, CARMENES and HIRES RVs spanning a total of 25 years, we further refine the planet candidate parameters to $P=24.422\pm 0.014$ days, $K=3.19\pm 0.27$ m/s, $M$ sin $i=10.6\pm 1.2M_{\oplus }$, and $a=0.142\pm 0.005$ au. We do not find any additional planet candidate signals in the data of HD79211 nor do we find any planet candidate signals in HD79210. This system adds to the number of exoplanets detected in binaries with M dwarf members, and serves as a case study for planet formation in stellar binaries.

arXiv commentAccepted for publication in AJ, 29 pages, 17 figures

References in corpus (52)

• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Gaia mission
• The Transiting Exoplanet Survey Satellite
• The USNO-B Catalog
• Gaia Data Release 2: The astrometric solution
• The Man Behind the Curtain: X-rays Drive the UV through NIR Variability in the 2013 AGN Outburst in NGC 2617
• Sloan Digital Sky Survey IV: Mapping the Milky Way, Nearby Galaxies, and the Distant Universe
• Gaia Early Data Release 3: The astrometric solution
• The All-Sky Automated Survey for Supernovae (ASAS-SN) Light Curve Server v1.0
• Kepler-16: A Transiting Circumbinary Planet
• How to Constrain Your M Dwarf: measuring effective temperature, bolometric luminosity, mass, and radius
• AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves
• AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves (Expanded Edition)
• Stellar Diameters and Temperatures II. Main Sequence K & M Stars
• RadVel: The Radial Velocity Modeling Toolkit
• The Solar Neighborhood XVII: Parallax Results from the CTIOPI 0.9m Program -- Twenty New Members of the RECONS 10 Parsec Sample
• The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey
• Unresolved stellar companions with Gaia DR2 astrometry
• The HARPS-TERRA project I. Description of the algorithms, performance and new measurements on a few remarkable stars observed by HARPS
• Kepler-47: A Transiting Circumbinary Multi-Planet System
• Three regimes of extrasolar planets inferred from host star metallicities
• The Hipparcos-Gaia Catalog of Accelerations: Gaia EDR3 Edition
• The HARPS search for Earth-like planets in the habitable zone: I -- Very low-mass planets around HD20794, HD85512 and HD192310
• Planetary detection limits taking into account stellar noise. I. Observational strategies to reduce stellar oscillation and granulation effects
• Parallax Systematics and Photocenter Motions of Benchmark Eclipsing Binaries in Gaia EDR3
• SOAP 2.0: A tool to estimate the photometric and radial velocity variations induced by stellar spots and plages
• The Impact of Stellar Multiplicity on Planetary Systems, I.: The Ruinous Influence of Close Binary Companions
• Stellar and substellar companions from Gaia EDR3 -- Proper motion anomaly and resolved common proper motion pairs
• The CARMENES search for exoplanets around M dwarfs: High-resolution optical and near-infrared spectroscopy of 324 survey stars
• Planet Hunters: A Transiting Circumbinary Planet in a Quadruple Star System
• The Solar Neighborhood XXXVII: The Mass-Luminosity Relation for Main Sequence M Dwarfs
• Eclipsing Binary Stars as Benchmarks for Trigonometric Parallaxes in the Gaia Era
• Properties of planets in binary systems. The role of binary separation
• The CARMENES search for exoplanets around M dwarfs: Different roads to radii and masses of the target stars
• The Solar Neighborhood XLV. The Stellar Multiplicity Rate of M Dwarfs Within 25 pc
• CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS
• Extrasolar planets in stellar multiple systems
• Three years of Sun-as-a-star radial-velocity observations on the approach to solar minimum
• The HARPS-N Rocky Planet Search I. HD219134b: A transiting rocky planet in a multi-planet system at 6.5 pc from the Sun
• The M-dwarfs in Multiples (MinMs) survey - I. Stellar multiplicity among low-mass stars within 15 pc
• Stellar companions to exoplanet host stars: Lucky Imaging of transiting planet hosts
• The Transit Light Curve Project. XIII. Sixteen Transits of the Super-Earth GJ 1214b
• Stacked Bayesian general Lomb-Scargle periodogram: Identifying stellar activity signals
• Filtering solar-like oscillations for exoplanet detection in radial velocity observations
• The multiplicity of exoplanet host stars - New low-mass stellar companions of the exoplanet host stars HD125612 and HD212301
• K2-111: an old system with two planets in near-resonance
• A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions
• Determination of spectroscopic parameters for 313 M dwarf stars from their APOGEE Data Release 16 H-band spectra
• An accurate mass determination for Kepler-1655b, a moderately-irradiated world with a significant volatile envelope
• On The Orbital Separation Distribution and Binary Fraction of M Dwarfs
• Indication of a massive circumbinary planet orbiting the Low Mass X-ray Binary MXB 1658-298
• The CARMENES search for exoplanets around M dwarfs. A super-Earth planet orbiting HD 79211 (GJ 338 B)

Cited by in corpus (1)

• A review of planetary systems around HD 99492, HD 147379 and HD 190007 with HARPS-N