Detection and characterisation of 54 massive companions with the SOPHIE spectrograph. Seven new brown dwarfs and constraints on the brown dwarf desert

  title={Detection and characterisation of 54 massive companions with the SOPHIE spectrograph. Seven new brown dwarfs and constraints on the brown dwarf desert},
  author={F. Kiefer and G. H'ebrard and J. Sahlmann and S. Sousa and T. Forveille and N. Santos and M. Mayor and M. Deleuil and P. Wilson and S. Dalal and R. D'iaz and G. Henry and J. Hagelberg and M. Hobson and O. Demangeon and V. Bourrier and X. Delfosse and L. Arnold and N. Astudillo-Defru and J. Beuzit and I. Boisse and X. Bonfils and S. Borgniet and F. Bouchy and B. Courcol and D. Ehrenreich and N. Hara and A. Lagrange and C. Lovis and G. Montagnier and C. Moutou and F. Pepe and C. Perrier and J. Rey and A. Santerne and D. S'egransan and S. Udry and A. Vidal-Madjar},
  journal={Astronomy and Astrophysics},
Context. Brown dwarfs (BD) are substellar objects intermediate between planets and stars with masses of 13-80 MJ. While isolated BDs are most likely produced by gravitational collapse in molecular clouds down to masses of a few MJ, a non-negligible fraction of low-mass companions might be formed through the planet-formation channel in protoplanetary discs. The upper mass limit of objects formed within discs is still observationally unknown, the main reason being the strong dearth of BD… Expand
Populating the brown dwarf and stellar boundary: Five stars with transiting companions near the hydrogen-burning mass limit
We report the discovery of five transiting companions near the hydrogen-burning mass limit in close orbits around main sequence stars originally identified by the Transiting Exoplanet SurveyExpand
Determining the mass of the planetary candidate HD 114762 b using Gaia
The first planetary candidate discovered by Latham et al. (1989) with radial velocities around a solar-like star other than the Sun, HD 114762 b, was detected with a minimum mass of 11 Mjup. TheExpand
Characterizing brown dwarf companions with IRDIS long-slit spectroscopy: HD 1160 B and HD 19467 B
The determination of the fundamental properties (mass, separation, age, gravity and atmospheric properties) of brown dwarf companions allows us to infer crucial informations on their formation andExpand
Orbital Refinement and Stellar Properties for the HD 9446, HD 43691, and HD 179079 Planetary Systems
The Transit Ephemeris Refinement and Monitoring Survey is a project that aims to detect transits of intermediate-long period planets by refining orbital parameters of the known radial velocityExpand
Discovery and characterization of the exoplanets WASP-148b and c
We present the discovery and characterization of WASP-148, a new extrasolar system that includes at least two giant planets. The host star is a slowly rotating inactive late-G dwarf with a V = 12Expand
True Masses of the Long-period Companions to HD 92987 and HD 221420 from Hipparcos–Gaia Astrometry
The extensive time span of modern radial velocity surveys has made the discovery of long-period substellar companions more common in recent years; however, measuring the true masses of these objectsExpand
A precise architecture characterization of theπMensae planetary system
The bright star $\pi$ Men was chosen as the first target for a radial velocity follow-up to test the performance of ESPRESSO, the new high-resolution spectrograph at the ESO's Very-Large TelescopeExpand
Discovery of a young low-mass brown dwarf transiting a fast-rotating F-type star by the Galactic Plane eXoplanet (GPX) survey
We announce the discovery of GPX-1b, a transiting brown dwarf with a mass of $19.7\pm 1.6$ $M_{\mathrm{Jup}}$ and a radius of $1.47\pm0.10$ $R_{\mathrm{Jup}}$, the first sub-stellar object discoveredExpand
Phase II of the LAMOST-Kepler/K2 Survey. I. Time Series of Medium-resolution Spectroscopic Observations
Phase \RNum{2} of the LAMOST-{\sl Kepler/K}2 survey (LK-MRS), initiated in 2018, aims at collecting medium-resolution spectra ($R\sim7,500$; hereafter MRS) for more than $50,000$ stars with multipleExpand


The SOPHIE search for northern extrasolar planets - IX. Populating the brown dwarf desert
Radial velocity planet search surveys of nearby solar-type stars have shown a strong scarcity of brown dwarf companions within similar to 5 AU. There is presently no comprehensive explanation forExpand
The SOPHIE search for northern extrasolar planets - IV. Massive companions in the planet-brown dwarf boundary
Context. The mass domain where massive extrasolar planets and brown dwarfs lie is still poorly understood. Indeed, not even a clear dividing line between massive planets and brown dwarfs has beenExpand
Hipparcos preliminary astrometric masses for the two close-in companions to HD 131664 and HD 43848 - A brown dwarf and a low-mass star
Context. Several mechanisms for forming brown dwarfs have been proposed, which today are not believed to be mutually exclusive. Among the fundamental characteristics of brown dwarfs that areExpand
Low-mass companions to Hyades stars
It is now well established that a large fraction of the low-mass stars are binaries or higher order multiples. Similarly a sizable fraction have giant planets. In contrast to these, the situation forExpand
The CORALIE survey for southern extra-solar planets - VIII. The very low-mass companions of HD 141937, HD 162020, HD 168443 and HD 202206: Brown dwarfs or “superplanets”?
Doppler CORALIE measurements of the solar-type stars HD 141937, HD 162020, HD 168443 and HD 202206 show Keplerian radial-velocity variations revealing the presence of 4 new companions with minimumExpand
Fourteen New Companions from the Keck and Lick Radial Velocity Survey Including Five Brown Dwarf Candidates
We present radial velocities for 14 stars on the California and Carnegie Planet Search target list that reveal new companions. One star, HD 167665, was fit with a definitive Keplerian orbit leadingExpand
Statistical properties of brown dwarf companions: implications for different formation mechanisms
The mass domain where massive extrasolar planets and brown dwarfs overlap is still poorly understood due to the paucity of brown dwarfs orbiting close to solar-type stars, the so-called brown dwarfExpand
SOPHIE velocimetry of Kepler transit candidates. VIII. KOI-205 b: a brown-dwarf companion to a K-type dwarf
We report the discovery of the discovery of a transiting brown dwarf companion to KOI-205, a K0 main-sequence star, in a 11.720125-day period transits were detected by the Kepler space telescope, andExpand
The SOPHIE search for northern extrasolar planets. X. Detection and characterization of giant planets by the dozen
We present new radial velocity measurements of eight stars secured with the spectrograph SOPHIE at the 193-cm telescope of the Haute-Provence Observatory allowing the detection and characterizationExpand
Search for brown-dwarf companions of stars
Context. The frequency of brown-dwarf companions in close orbit around Sun-like stars is low compared to the frequency of planetary and stellar companions. There is presently no comprehensiveExpand