J/A+A/506/303 CoRoT-7 radial velocities (Queloz+, 2009)
CoRoT-7 planetary system: two orbiting super-Earths.
Queloz D., Bouchy F., Moutou C., Hatzes A., Hebrard G., Alonso R.,
Auvergne M., Baglin A., Barbieri M., Barge P., Benz W., Borde P.,
Deeg H.J., Deleuil M., Dvorak R., Erikson A., Ferraz Mello S.,
Fridlund M., Gandolfi D., Gillon M., Guenther E., Guillot T., Jorda L.,
Hartmann M., Lammer H., Leger A., Llebaria A., Lovis C., Magain P.,
Mayor M., Mazeh T., Ollivier M., Patzold M., Pepe F., Rauer H., Rouan D.,
Schneider J., Segransan D., Udry S., Wuchterl G.
<Astron. Astrophys. 506, 303 (2009)>
=2009A&A...506..303Q 2009A&A...506..303Q
ADC_Keywords: Stars, dwarfs ; Planets ; Radial velocities
Keywords: stars: planetary systems - techniques: radial velocities -
techniques: photometric - stars: activity - stars: starspots
Abstract:
We report on an intensive observational campaign carried out with
HARPS at the 3.6m telescope at La Silla on the star CoRoT-7.
Additional simultaneous photometric measurements carried out with the
Euler Swiss telescope have demonstrated that the observed radial
velocity variations are dominated by rotational modulation from cool
spots on the stellar surface. Several approaches were used to extract
the radial velocity signal of the planet(s) from the stellar activity
signal.
Description:
First, a simple pre-whitening procedure was employed to find and
subsequently remove periodic signals from the complex frequency
structure of the radial velocity data. The dominant frequency in the
power spectrum was found at 23 days, which corresponds to the rotation
period of CoRoT-7. The 0.8535 day period of CoRoT-7b planetary
candidate was detected with an amplitude of 3.3m/s.
Objects:
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RA (2000) DE Designation(s)
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06 43 49.5 -01 03 47 CoRoT-7 = CoRoT-Exo-7
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 72 109 HARPS data
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See also:
B/corot : CoRoT observation log (CoRoT, 2009)
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d JDB Julian date
16- 22 F7.4 km/s RV Radial velocity
24- 29 F6.4 km/s e_RV rms uncertainty on RV
31- 36 F6.4 km/s FWHM Width (FWHM)
38- 43 F6.4 km/s e_FWHM rms uncertainty on FWHM
45- 50 F6.4 km/s Span Bisector span velocity
52- 57 F6.4 km/s e_Span rms uncertainty on Span
59- 65 F7.4 [-] log(R'(HK)) ? Activity index
67- 72 F6.4 [-] e_log(R'(HK)) ? rms uncertainty on log(R'(HK))
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Oct-2009