J/A+A/523/A88 A Jupiter-mass companion around HD 109246 (Boisse+, 2010)
The SOPHIE search for northern extrasolar planets.
III. A Jupiter-mass companion around HD 109246.
Boisse, I., Eggenberger, A., Santos, N.C., Lovis C., Bouchy F., Hebrard G.,
Arnold L., Bonfils X., Delfosse X., Desort M., Diaz R.F., Ehrenreich D.,
Forveille T., Gallenne A., Lagrange A.M., Moutou C., Udry S., Pepe F.,
Perrier C., Perruchot S., Pont F., Queloz D., Santerne A., Segransan D.,
Vidal-Madjar A.
<Astron. Astrophys. 523, A88 (2010)>
=2010A&A...523A..88B 2010A&A...523A..88B
ADC_Keywords: Stars, dwarfs ; Stars, S ; Planets ; Radial velocities ;
Spectroscopy
Keywords: planetary systems - techniques: radial velocities -
stars: individual: HD 109246 - stars: activity - stars: abundances
Abstract:
We report the detection of a Jupiter-mass planet discovered with the
SOPHIE spectrograph mounted on the 1.93-m telescope at the
Haute-Provence Observatory. The new planet orbits HD 109246, a G0V
star slightly more metallic than the Sun. HD 109246b has a minimum
mass of 0.77M{jup}, an orbital period of 68 days, and an
eccentricity of 0.12. It is placed in a sparsely populated region of
the period distribution of extrasolar planets. We also present a
correction method for the so-called seeing effect that affects the
SOPHIE radial velocities. We complement this discovery announcement
with a description of some calibrations that are implemented in the
SOPHIE automatic reduction pipeline. These calibrations allow the
derivation of the photon-noise radial velocity uncertainty and some
useful stellar properties (vsini, [Fe/H], log R'hk) directly from the
SOPHIE data.
Description:
Radial velocity measurements of HD 109246 obtained with the SOPHIE
spectrograph and stars used to calibrate the Ssophie into the SMount
Wilson to measure the logR'hk from the SOPHIE spectra.
Objects:
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RA (2000) DE Designation(s)
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12 32 07.2 +74 29 22 HD 109246 = HIP 61177
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
rv.dat 29 58 HD109246 radial velocity data
calib.dat 35 25 Calibration of the Sophie S index (Ssophie)
in Mount Wilson S index (Smw)
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Barycentric Julain date
15- 22 F8.4 km/s RV Radial velocity
24- 29 F6.4 km/s e_RV Error in radial velocity measurements
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Byte-by-byte Description of file: calib.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name HD name of the star
9- 14 F6.3 --- Smw S Mount Wilson value (1)
15- 20 F6.3 --- e_Smw Error in S Mount Wilson value (1)
21- 26 F6.3 --- Ssophie S measured in SOPHIE spectra
27- 32 F6.3 --- e_Ssophie Error in S sophie
34- 35 A2 --- Mode SOPHIE mode of observation (2)
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Note (1): Smw and e_Smw are from Duncan et al. (1991ApJS..76...383D 1991ApJS..76...383D)
Note (2): The HE and HR SOPHIE mode of observation have to be calibrated
separately.
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Acknowledgements:
Isabelle Boisse, iboisse(at)iap.fr
(End) Isabelle Boisse [IAP, Paris, France], Patricia Vannier [CDS] 30-Aug-2010