J/A+A/513/L8 BD+20 1790 radial velocity curve (Figueira+, 2010)
Evidence against the young hot-Jupiter around BD+20 1790.
Figueira P., Marmier M., Bonfils X., Di Folco E., Udry S., Santos N.C.,
Lovis C., Megevand D., Melo C.H.F., Pepe F., Queloz D., Segransan D.,
Triaud A.H.M.J., Viana Almeida P.
<Astron. Astrophys., 513, L8-8 (2010)>
=2010A&A...513L...8F 2010A&A...513L...8F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Radial velocities
Keywords: instrumentation: spectrographs - methods: observational -
techniques: radial velocities - planetary systems -
stars: individual: BD+20 1790 - stars: activity
Abstract:
The young active star BD +20 1790 has been inferred to host a
substellar companion from radial-velocity measurements that detected
the reflex motion induced on the parent star.
We attempt to completely characterize the radial-velocity signal in
order to assess its nature.
Description:
We used the CORALIE spectrograph to obtain precise (∼10m/s)
radial-velocity measurements of this active star, while characterizing
the bisector span variations. We took particular care to correctly
sample both the proposed planetary orbital period, of 7.8 days, and
the stellar rotation period, of 2.4 days.
**************************************************************************
* *
* Sorry, but the author(s) never supplied the tabular material *
* (radial velocity data) as announced in the paper. *
* The image of the radial velocity curve only is available here. *
* *
**************************************************************************
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
07 23 43.6 +20 24 59 BD+20 1790 = TYC 1355-214-1
----------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
img7.png 512 45 *Image of the radial velocity curve
--------------------------------------------------------------------------------
Note on img7.png: CORALIE RV measurements for BD+20 1270. The measured RVs are
plotted as a function of time (top pannel) and phase-folded on the orbit
announced by Hernan-Obispo et al. (2010, Cat. J/A+A/512/A45), (bottom panel).
The published RV measurements and error bars are presented as well
(square symbols).
--------------------------------------------------------------------------------
See also:
J/A+A/512/A45 : Radial velocities of BD+20 1790 (Hernan-Obispo+, 2010)
Author's address:
Pedro Figueira,
(End) Patricia Vannier [CDS] 12-Jul-2010