The CARMENES search for exoplanets around M dwarfs. First visual-channel radial-velocity measurements and orbital parameter updates of seven M-dwarf planetary systems

Abstract

Context: The main goal of the CARMENES survey is to find Earth-mass planets around nearby M-dwarf stars. Seven M-dwarfs included in the CARMENES sample had been observed before with HIRES and HARPS and either were reported to have one short period planetary companion (GJ15A, GJ176, GJ436, GJ536 and GJ1148) or are multiple planetary systems (GJ581 and GJ876). Aims: We aim to report new precise optical radial velocity measurements for these planet hosts and test the overall capabilities of CARMENES. Methods: We combined our CARMENES precise Doppler measurements with those available from HIRES and HARPS and derived new orbital parameters for the systems. Bona-fide single planet systems are fitted with a Keplerian model. The multiple planet systems were analyzed using a self-consistent dynamical model and their best fit orbits were tested for long-term stability. Results: We confirm or provide supportive arguments for planets around all the investigated stars except for GJ15A, for which we find that the post-discovery HIRES data and our CARMENES data do not show a signal at 11.4 days. Although we cannot confirm the super-Earth planet GJ15Ab, we show evidence for a possible long-period ($P_{\mathrm{c}}$ = 7025${}_{-629}^{+972}$ d) Saturn-mass ($m_{\mathrm{c}}\sin i$ = 51.8${}_{-5.8}^{+5.5}{M}_{\oplus }$) planet around GJ15A. In addition, based on our CARMENES and HIRES data we discover a second planet around GJ1148, for which we estimate a period $P_{\mathrm{c}}$ = 532.6${}_{-2.5}^{+4.1}$ d, eccentricity $e_{\mathrm{c}}$ = 0.34${}_{-0.06}^{+0.05}$ and minimum mass $m_{\mathrm{c}}\sin i$ = 68.1${}_{-2.2}^{+4.9}{M}_{\oplus }$. Conclusions: The CARMENES optical radial velocities have similar precision and overall scatter when compared to the Doppler measurements conducted with HARPS and HIRES. We conclude that CARMENES is an instrument that is up to the challenge of discovering rocky planets around low-mass stars.

arXiv commentAccepted for publication in A&A, 24 pages, 16 figures, 14 tables

References in corpus (57)

• The Gaia mission
• Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties
• The generalised Lomb-Scargle periodogram. A new formalism for the floating-mean and Keplerian periodograms
• Seven temperate terrestrial planets around the nearby ultracool dwarf star TRAPPIST-1
• A terrestrial planet candidate in a temperate orbit around Proxima Centauri
• No planet for HD 166435
• The HARPS search for southern extra-solar planets XXXI. The M-dwarf sample
• Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes
• A Neptune-Mass Planet Orbiting the Nearby M Dwarf GJ 436
• A ~ 7.5 Earth-Mass Planet Orbiting the Nearby Star, GJ 876
• Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
• The LCES HIRES/Keck Precision Radial Velocity Exoplanet Survey
• The California Planet Survey I. Four New Giant Exoplanets
• The HARPS search for southern extra-solar planets XVIII. An Earth-mass planet in the GJ 581 planetary system
• The HARPS-TERRA project I. Description of the algorithms, performance and new measurements on a few remarkable stars observed by HARPS
• A temperate rocky super-Earth transiting a nearby cool star
• Stellar Activity Masquerading as Planets in the Habitable Zone of the M dwarf Gliese 581
• The NASA-UC-UH Eta-Earth Program: IV. A Low-mass Planet Orbiting an M Dwarf 3.6 PC from Earth
• Detection of transits of the nearby hot Neptune GJ 436 b
• The Lick-Carnegie Exoplanet Survey: A Uranus-mass Fourth Planet for GJ 876 in an Extrasolar Laplace Configuration
• Introduction to astroML: Machine Learning for Astrophysics
• A Planetary Companion to the Nearby M4 Dwarf, Gliese 876
• The HARPS search for southern extra-solar planets. VI. A Neptune-mass planet around the nearby M dwarf Gl 581
• The Solar Neighborhood XXXVII: The Mass-Luminosity Relation for Main Sequence M Dwarfs
• Rotation periods of late-type dwarf stars from time-series high-resolution spectroscopy of chromospheric indicators
• CARMENES input catalogue of M dwarfs. I. Low-resolution spectroscopy with CAFOS
• The Lick-Carnegie Exoplanet Survey: A 3.1 M_Earth Planet in the Habitable Zone of the Nearby M3V Star Gliese 581
• The low-level radial velocity variability in Barnard's star (=GJ 699). Secular acceleration, indications for convective redshift, and planet mass limits
• Secular Evolution of Hierarchical Planetary Systems
• The HARPS search for southern extra-solar planets XLI. A dozen planets around the M dwarfs GJ 3138, GJ 3323, GJ 273, GJ 628, and GJ 3293
• Systemic: A Testbed For Characterizing the Detection of Extrasolar Planets. I. The Systemic Console Package
• The M Dwarf GJ 436 and its Neptune-Mass Planet
• Flat-relative optimal extraction. A quick and efficient algorithm for stabilised spectrographs
• A global analysis of Spitzer and new HARPS data confirms the loneliness and metal-richness of GJ 436 b
• The M dwarf planet search programme at the ESO VLT + UVES. A search for terrestrial planets in the habitable zone of M dwarfs
• Accounting for velocity jitter in planet search surveys
• A Long-Period Jupiter-Mass Planet Orbiting the Nearby M Dwarf GJ849
• The NASA-UC Eta-Earth Program: I. A Super-Earth Orbiting HD 7924
• The HARPS search for southern extra-solar planets: XIV. Gl 176b, a super-Earth rather than a Neptune, and at a different period
• The impact of red noise in radial velocity planet searches: Only three planets orbiting GJ581?
• A Dedicated M-Dwarf Planet Search Using The Hobby-Eberly Telescope
• Calibrating echelle spectrographs with Fabry-Perot etalons
• A ~5 M_earth Super-Earth Orbiting GJ 436?: The Power of Near-Grazing Transits
• An Empirically Derived Three-Dimensional Laplace Resonance in the Gliese 876 Planetary System
• Characterisation of the radial velocity signal induced by rotation in late-type dwarfs
• Bayesian re-analysis of the radial velocities of Gliese 581. Evidence in favour of only four planetary companions
• Dynamical Evolution of Multi-Resonant Systems: the Case of GJ876
• A Hubble Space Telescope transit light curve for GJ436b
• An m sin i = 24 Earth Mass Planetary Companion To The Nearby M Dwarf GJ 176
• A Detailed Analysis of the HD 73526 2:1 Resonant Planetary System
• Characterizing the Orbital and Dynamical State of the HD 82943 Planetary System With Keck Radial Velocity Data
• The Lick-Carnegie Exoplanet Survey: A Saturn-Mass Planet in the Habitable Zone of the Nearby M4V Star HIP 57050
• Stellar Activity and its Implications for Exoplanet Detection on GJ 176
• Three planets orbiting Wolf 1061
• HADES RV Programme with HARPS-N at TNG: V. A super-Earth on the inner edge of the habitable zone of the nearby M-dwarf GJ 625
• A super-Earth orbiting the nearby M-dwarf GJ 536
• Periodic Halpha variations in GL 581: Further evidence for an activity origin to GL 581d

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