J/A+A/512/A45 Radial velocities of BD+20 1790 (Hernan-Obispo+, 2010)
Evidence of a massive planet candidate orbiting the young active K5V star
BD+20 1790.
Hernan-Obispo M., Galvez-Ortiz M. C., Anglada-Escude G., Kane S. R.,
Barnes J. R., de Castro E., Cornide M.
<Astron. Astrophys. 512, A45 (2010)>
=2010A&A...512A..45H 2010A&A...512A..45H
ADC_Keywords: Stars, late-type ; Planets ; Radial velocities
Keywords: stars: activity - stars: late-type - stars: individual (BD+20 1790) -
planetary systems
Abstract:
BD+20 1790 is a young active, metal-rich, late-type K5Ve star. We have
undertaken a study of stellar activity and kinematics for this star
over the past few years. Previous results show a high level of stellar
activity, with the presence of prominence-like structures, spots on
the surface, and strong flare events, despite the moderate rotational
velocity of the star. In addition, radial velocity variations with a
semi-amplitude of up to 1km/s were detected.
We investigate the nature of these radial velocity variations, in
order to determine whether they are due to stellar activity or the
reflex motion of the star induced by a companion.
Description:
This paper reports the discovery of a planetary companion for the
young and active K5V star BD+20 1790. The fit of the RV data yields a
solution for a close-in massive planet with an orbital period of
7.78days. The radial velocity data listed here are not part of a
planetary search programme.
Objects:
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RA (2000) DE Designation(s)
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07 23 43.6 +20 24 59 BD+20 1790 = TYC 1355-214-1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 24 13 Radial velocity of BD+20 1790
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See also:
J/MNRAS/328/45 : Late-type stars members of young groups (Montes+, 2001)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD Julian Date
15- 18 F4.2 km/s HRV Heliocentric radial velocity
21- 24 F4.2 km/s e_HRV Radial velocity error
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Acknowledgements:
Magdalena Hernan-Obispo, mho(at)astrax.fis.ucm.es
(End) Patricia Vannier [CDS] 19-Jan-2010