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J/AJ/131/1784 Astrometric Grid Giant Star Survey. I. (Bizyaev+, 2006)
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Beginning of ReadMe :J/AJ/131/1784 Astrometric Grid Giant Star Survey. I. (Bizyaev+, 2006)
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The Space Interferometry Mission Astrometric Grid Giant Star Survey.
I. Stellar parameters and radial velocity variability.
Bizyaev D., Smith V.V., Arenas J., Geisler D., Majewski S.R.,
Patterson R.J., Cunha K., Del Pardo C., Suntzeff N.B., Gieren W.
<Astron. J., 131, 1784-1796 (2006)>
=2006AJ....131.1784B
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ADC_Keywords: Stars, giant ; Radial velocities ; Abundances, [Fe/H]
Keywords: stars: abundances - stars: fundamental parameters - stars: late-type -
stars: oscillations - techniques: radial velocities
Abstract:
We present results from a campaign of multiple-epoch echelle
spectroscopy of relatively faint (V=9.5-13.5mag) red giants
observed as potential astrometric grid stars for the Space
Interferometry Mission (SIM PlanetQuest). Data are analyzed for 775
stars selected from the Grid Giant Star Survey, spanning a wide range
of effective temperatures (Teff), gravities, and metallicities. The
spectra are used to determine these stellar parameters and to monitor
radial velocity (RV) variability at the 100m/s level.
Description:
Spectroscopic observations of 434 stars in the northern subsample of
GGSS candidates were conducted in the period from 2001 January to 2002
December. We made use of the 2.1m telescope at the McDonald
Observatory and the Sandiford Cassegrain echelle spectrograph, which
provides R=55000 resolution.