The <i>SOPHIE</i> search for northern extrasolar planets

Bouchy, F.; Hébrard, G.; Udry, S.; Delfosse, X.; Boisse, I.; Desort, M.; Bonfils, X.; Eggenberger, A.; Ehrenreich, D.; Forveille, T.; Lagrange, A. M.; Coroller, H. Le; Lovis, C.; Moutou, C.; Pepe, F.; Perrier, C.; Pont, F.; Queloz, D.; Santos, N. C.; Ségransan, D.; Vidal‐Madjar, A.

doi:10.1051/0004-6361/200912427

Cited by 237 publications

(291 citation statements)

References 37 publications

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“…The spectra were reduced and extracted using the SOPHIE pipeline (Bouchy et al 2009), and the resulting wavelengthcalibrated 2D spectra were correlated using a numerical binary mask corresponding to spectral type G2 to obtain the radial velocity measurement (Baranne et al 1996;Pepe et al 2002). The full width at half maximum (FWHM), contrast, and bisector span of the cross-correlation function (CCF) are also provided by the pipeline.…”

Section: Observations and Data Reductionmentioning

confidence: 99%

“…This precision level is critical for detecting low-mass exoplanets around A&A 581, A38 (2015) solar-type stars. In the context of the subprogram "High precision search for Neptunes and super-Earths" of the SOPHIE extrasolar planets research consortium (Bouchy et al 2009), we redefined a sample of 190 bright stars on the following criteria: 1) in the northern hemisphere; 2) with spectral type G and K and 0.6 ≤ B − V ≤ 1.4; 3) on a volume limited to 35 pc; 4) nonactive (v sin i ≤ 4.5 km s −1 , log R HK ≤ −4.8); 5) not part of a binary system and not harboring giant planets at short orbital period; and 6) not part of RV surveys carried out with HARPS-N GTO (Cosentino et al 2012) at the TNG. This subprogram is intensively conducted since June of 2011.…”

Section: Introductionmentioning

confidence: 99%

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The SOPHIE search for northern extrasolar planets

Courcol

Bouchy

Pepe

et al. 2015

A&A

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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 in past years, and thanks to an appropriate correction of systematic instrumental drift, it is now reaching 2 m s −1 precision in radial velocity measurements on all timescales. As part of a dedicated radial velocity survey devoted to search for low-mass planets around a sample of 190 bright solar-type stars in the northern hemisphere, we report the detection of a warm Neptune with a minimum mass of 16.1 ± 2.7 M ⊕ orbiting the solar analog HD 164595 in 40 ± 0.24 days. We also revised the parameters of the multiplanetary system around HD 190360. We discuss this new detection in the context of the upcoming space mission CHEOPS, which is devoted to a transit search of bright stars harboring known exoplanets.

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Section: Observations and Data Reductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The SOPHIE search for northern extrasolar planets

Courcol

Bouchy

Pepe

et al. 2015

A&A

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“…Observations were performed in high-efficiency mode, with resolving power λ/∆λ ∼ 40 000, and exposure times ranging from 900 to 2700 s. The resulting signalto-noise ratios (S/N) per pixel at 550 nm are between 7 and 16. The spectra were reduced and extracted using the SOPHIE pipeline (Bouchy et al 2009), and the radial velocites were obtained from a Gaussian fit to the cross-correlation function with numerical masks corresponding to different spectral types. The charge transfer inefficiency (CTI) effect was corrected using the polynomial in Santerne et al (2012).…”

Section: Sophie Velocimetrymentioning

confidence: 99%

SOPHIE velocimetry ofKeplertransit candidates

Díaz

Damiani

Deleuil

et al. 2013

A&A

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We report the discovery of a transiting brown dwarf companion to KOI-205, a K0 main-sequence star, in a 11.720125-day period orbit. The transits were detected by the Kepler space telescope, and the reflex motion of the star was measured using radial velocity observations obtained with the SOPHIE spectrograph. The atmospheric parameters of the host stars were determined from the analysis of high-resolution, high signal-to-noise ratio ESPaDOns spectra obtained for this purpose. Together with spectrophotometric measurements recovered from the literature, these spectra indicate that the star is a mildly metallic K0 dwarf with T eff 5237 ± 60 K. The mass of the companion is 39.9 ± 1.0 M Jup and its radius is 0.81 ± 0.02 R Jup , in agreement with current theoretical predictions. This is the first time a bona fide brown dwarf companion is detected in orbit around a star of this type. The formation and orbital evolution of brown dwarf companions is briefly discussed in the light of this new discovery.

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“…These observations were performed with the SOPHIE instrument at the 1.93-m telescope of HauteProvence Observatory, France as part of the CoRoT spectroscopic follow-up (Moutou as PI). SOPHIE is a cross-dispersed, environmentally stabilized Echelle spectrograph dedicated to high-precision radial velocity measurements (Bouchy & The Sophie Team 2006;Perruchot et al 2008;Bouchy et al 2009). To increase the throughput and reduce the read-out noise for this faint target, we used the high-efficiency mode (resolution power R = 40 000) of the spectrograph and the slow read-out mode of the 4096 × 2048 15-μm-pixel CCD detector.…”

Section: Radial Velocity Observationsmentioning

confidence: 99%

Transiting exoplanets from the CoRoT space mission

Fridlund¹,

Hébrard

Alonso

et al. 2010

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The CoRoT satellite exoplanetary team announces its sixth transiting planet in this paper. We describe and discuss the satellite observations as well as the complementary ground-based observations -photometric and spectroscopic -carried out to assess the planetary nature of the object and determine its specific physical parameters. The discovery reported here is a "hot Jupiter" planet in an 8.9d orbit, 18 stellar radii, or 0.08 AU, away from its primary star, which is a solar-type star (F9V) with an estimated age of 3.0 Gyr. The planet mass is close to 3 times that of Jupiter. The star has a metallicity of 0.2 dex lower than the Sun, and a relatively high 7 Li abundance. While the light curve indicates a much higher level of activity than, e.g., the Sun, there is no sign of activity spectroscopically in e.g., the [Ca ii] H&K lines.

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The SOPHIE search for northern extrasolar planets

Cited by 237 publications

References 37 publications

The SOPHIE search for northern extrasolar planets

The SOPHIE search for northern extrasolar planets

SOPHIE velocimetry ofKeplertransit candidates

Transiting exoplanets from the CoRoT space mission

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