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Autoguider locked on a fiber input for precision stellar radial velocities

Astron. Astrophys. Suppl. Ser. Autoguider locked on a velocities? F. Bouchy P. Connes Service d'Aeronomie du CNRS Verrieres-le-Buisson Cedex France e-mail: Measurement of stellar radial velocities

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

Context. Low-mass stars are currently the best targets when searching for rocky planets in the habitable zone of their host star. Over the last 13 yr, precise radial velocities measured with the HARPS spectrograph have identified over a dozen super-Earths and Earth-mass planets (msini ≤ 10M⊕) around M dwarfs, with a well-understood selection function. This well-defined sample...

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

Context. Low-mass stars are currently the best targets when searching for rocky planets in the habitable zone of their host star. Over the last 13 yr, precise radial velocities measured with the HARPS spectrograph have identified over a dozen super-Earths and Earth-mass planets (msini ≤ 10M⊕) around M dwarfs, with a well-understood selection function. This well-defined sample...

Eyes on K2-3: A system of three likely sub-Neptunes characterized with HARPS-N and HARPS

Context. M-dwarf stars are promising targets for identifying and characterizing potentially habitable planets. K2-3 is a nearby (45 pc), early-type M dwarf hosting three small transiting planets, the outermost of which orbits close to the inner edge of the stellar (optimistic) habitable zone. The K2-3 system is well suited for follow-up characterization studies aimed at...

An extreme planetary system around HD 219828 - One long-period super Jupiter to a hot-Neptune host star

Context. With about 2000 extrasolar planets confirmed, the results show that planetary systems have a whole range of unexpected properties. This wide diversity provides fundamental clues to the processes of planet formation and evolution.Aims. We present a full investigation of the HD 219828 system, a bright metal-rich star for which a hot Neptune has previously been detected...

The SOPHIE search for northern extrasolar planets - XI. Three new companions and an orbit update: Giant planets in the habitable zone

We report the discovery of three new substellar companions to solar-type stars, HD 191806, HD 214823, and HD 221585, based on radial velocity measurements obtained at the Haute-Provence Observatory. Data from the SOPHIE spectrograph are combined with observations acquired with its predecessor, ELODIE, to detect and characterise the orbital parameters of three new gaseous giant...

SOPHIE velocimetry of Kepler transit candidates - XVII. The physical properties of giant exoplanets within 400 days of period

While giant extrasolar planets have been studied for more than two decades now, there are still some open questions as to their dominant formation and migration processes, as well as to their atmospheric evolution in different stellar environments. In this paper, we study a sample of giant transiting exoplanets detected by the Kepler telescope with orbital periods up to 400 days...

SOPHIE velocimetry of Kepler transit candidates: a joint photometric, spectroscopic and dynamical analysis of the Kepler-117 system

We present the analysis of the multi-planetary system Kepler-117, which is part of our program of observations of Kepler planets. This system is composed of a ~ 30 MEarth planet in a ~ 19 days orbit and a ~ 2 MJ planet orbiting in ~ 51 days. Both the orbits have low eccentricity. The planets are not close to an exact low-order mean motion resonance, but exhibit significant...

WASP-113b and WASP-114b, two inflated hot Jupiters with contrasting densities

7 M. Lendl 3 8 J. McCormac 10 B. Ski 7 B Smalley 15 O. Turner 15 M. Vanhuysse 5 D. J. Armstrong 9 10 I. Boisse 12 F. Bouchy 12 A. Collier Cameron 14 F. Faedi 10 M. Gillon 19 C. Hellier 15 E. Jehin 19

The SOPHIE search for northern extrasolar planets - VII. A warm Neptune orbiting HD 164595

High-precision radial velocity surveys explore the population of low-mass exoplanets orbiting bright stars. This allows accurately deriving their orbital parameters such as their occurrence rate and the statistical distribution of their properties. Based on this, models of planetary formation and evolution can be constrained. The SOPHIE spectrograph has been continuously improved...

The SOPHIE search for northern extrasolar planets - VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

of M? = 1:02 M and a companion minimum mass of 32.3 MJup. The instrumental o set between ELODIE and SOPHIE is adjusted to 165 24 m s 1, which is marginally F. Bouchy et al.: The SOPHIE search for

The SOPHIE search for northern extrasolar planets - VIII. Follow-up of ELODIE candidates: long-period brown-dwarf companions

of M? = 1:02 M and a companion minimum mass of 32.3 MJup. The instrumental o set between ELODIE and SOPHIE is adjusted to 165 24 m s 1, which is marginally F. Bouchy et al.: The SOPHIE search for

CoRoT 101186644: A transiting low-mass dense M-dwarf on an eccentric 20.7-day period orbit around a late F-star - Discovered in the CoRoT lightcurves

We present the study of the CoRoT transiting planet candidate 101186644, also named LRc01_E1_4780. Analysis of the CoRoT lightcurve and the HARPS spectroscopic follow-up observations of this faint (mV = 16) candidate revealed an eclipsing binary composed of a late F-type primary (Teff = 6090 ± 200 K) and a low-mass, dense late M-dwarf secondary on an eccentric (e = 0.4) orbit...

The HARPS search for southern extra-solar planets - XXXII. New multi-planet systems in the HARPS volume limited sample: a super-Earth and a Neptune in the habitable zone

The vast diversity of planetary systems detected to date is defying our capability of understanding their formation and evolution. Well-defined volume-limited surveys are the best tool at our disposal to tackle the problem, via the acquisition of robust statistics of the orbital elements. We are using the HARPS spectrograph to conduct our survey of ≈850 nearby solar-type stars...

Consequences of spectrograph illumination for the accuracy of radial-velocimetry

For fiber-fed spectrographs with a stable external wavelength source, scrambling properties of optical fibers and, homogeneity and stability of the instrument illumination are important for the accuracy of radial-velocimetry. Optical cylindric fibers are known to have good azimuthal scrambling. In contrast, the radial one is not perfect. In order to improve the scrambling ability...

SOPHIE velocimetry of Kepler transit candidates - IV. KOI-196b: a non-inflated hot Jupiter with a high albedo

-Chièze , S. , Palacios , A. , Marques , J. P. , & Nghiem , P. A. P. 2010 , ApJ, 715 , 1539 Rowe , J. F. , Matthews , J. M. , Seager , S. , et al. 2006 , ApJ, 646 , 1241 Santerne, A. , Díaz , R. F. , Bouchy

SOPHIE velocimetry of Kepler transit candidates - VI. An additional companion in the KOI-13 system

We report the discovery of a new stellar companion in the KOI-13 system. KOI-13 is composed of two fast-rotating A-type stars of similar magnitude. One of these two stars hosts a transiting planet discovered by Kepler. We obtained new radial velocity measurements using the SOPHIE spectrograph at the Observatoire de Haute-Provence that reveal an additional companion in this system...

SOPHIE velocimetry of Kepler transit candidates - VI. An additional companion in the KOI-13 system

We report the discovery of a new stellar companion in the KOI-13 system. KOI-13 is composed of two fast-rotating A-type stars of similar magnitude. One of these two stars hosts a transiting planet discovered by Kepler. We obtained new radial velocity measurements using the SOPHIE spectrograph at the Observatoire de Haute-Provence that reveal an additional companion in this system...

New seismological results on the G0 IV η Bootis

, 475 , 322 Buzzoni , A. , Chavez , M. , Malagnini , M. L. , & Morossi , C. 2001 , PASP, 113 , 1365 Carrier , F. , Bouchy , F. , & Eggenberger , P. 2003 , Recent Research Developments in Astronomy ... & Astrophysics, 1 , 219, Research Signpost , India Carrier , F. , & Bourban , G. 2003 , A &A, 406 , L23 Carrier , F. , Bouchy , F. , Kienzle , F. , et al. 2001 , A &A, 378 , 142 Cayrel de Strobel , G., Soubiran

Improved stellar parameters of CoRoT-7 - A star hosting two super Earths

Context. Accurate parameters of the host stars of exoplanets are needed for interpreting the new planetary systems. The CoRoT satellite recently discovered a transiting rocky planet with a density similar to the inner planets in our solar system, a so-called super Earth. The mass was determined using ground-based follow-up spectroscopy, which also revealed a second, non...