J/A+A/576/A66 BD+20 1790 radial velocities and photometry (Hernan-Obispo+, 2015)
Analysis of combined radial velocities and activity of BD+20 1790:
evidence supporting the existence of a planetary companion.
Hernan-Obispo M., Tuomi M., Galvez-Ortiz M.C., Golovin A., Barnes J.R.,
Jones H.R.A., Kane S.R., Pinfield D., Jenkins J.S., Petit P.,
Anglada-Escude G., Marsden S.C., Catalan S., Jeffers S.V., de Castro E.,
Cornide M., Garces A., Jones M.I., Gorlova N., Andreev M.
<Astron. Astrophys. 576, A66 (2015)>
=2015A&A...576A..66H 2015A&A...576A..66H
ADC_Keywords: Stars, late-type ; Planets ; Radial velocities
Keywords: methods: statistical - techniques: radial velocities -
stars: activity - planetary systems - stars: individual: BD+20 1790
Abstract:
In a previous paper we reported a planetary companion to the young and
very active K5Ve star BD+20 1790.
This paper aims to more rigorously assess the nature of the radial
velocity measurements with an expanded data set and new methods of
analysis.
We have employed Bayesian methods to simultaneously analyse the radial
velocity and activity measurements based on a combined data set that
includes new and previously published observations.
Description:
This paper presents the simultaneously Bayesian analysis of the radial
velocity and activity indices for the K5Ve star BD+20 1790, that was
proposed to host a close-in massive planet by Hernan-Obispo
(2010A&A...512A..45H 2010A&A...512A..45H, Cat. J/A+A/512/A45). We present a new orbital
solution after removing the two main contributions of the stellar
jitter, one related with the photometric period (2.8 days) and a
second one related with the synodic period of the star+planet system
(4.26 days).
The radial velocities listed are nightly averaged, and were taked
using different spectrographs.
The photometric table shows only the data taken at Terskol
Observatory. Photometric data from ASAS (All Sky Automated Survey) of
BD+20 1790 can be obtained at http://www.astroew.edu.pl/asas
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
table1.dat 23 16 Radial velocity of BD+20 1790
photom.dat 25 2816 Terskol photometry of BD+20 1790
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See also:
J/A+A/512/A45 : Radial velocities of BD+20 1790 (Hernan-Obispo+, 2010)
http://www.astrouw.edu.pl/asas : ASAS-3 catalogue
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d JD [2454489/2456800] Julian Date
14- 17 F4.2 km/s HRV Heliocentric radial velocity
19- 23 F5.3 km/s e_HRV Heliocentric radial velocity error
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Byte-by-byte Description of file: photom.dat
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Bytes Format Units Label Explanations
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1- 18 F18.10 d JD [245520/2455310] Julian Date
20- 25 F6.3 mag Rmag [-0.5/-0.2] Relative R magnitude
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Acknowledgements:
Magdalena Hernan-Obispo, mhernanobispo (at) fis.ucm.es
References:
Hernan-Obispo et al., 2010A&A...512A..45H 2010A&A...512A..45H, Cat. J/A+A/512/A45
(End) Patricia Vannier [CDS] 17-Feb-2015