J/AJ/140/1911 Astrometric Grid Giant Star Survey. III. (Bizyaev+, 2010)
The Space Interferometry Mission Astrometric Grid Giant Star Survey.
III. Basic stellar parameters for an extended sample.
Bizyaev D., Smith V.V., Cunha K.
<Astron. J., 140, 1911-1918 (2010)>
=2010AJ....140.1911B 2010AJ....140.1911B
ADC_Keywords: Stars, late-type ; Spectroscopy ; Radial velocities;
Abundances, [Fe/H]
Keywords: stars: abundances - stars: atmospheres -
stars: fundamental parameters - stars: late-type - stars: rotation
Abstract:
We present results of high-resolution (∼55000) spectral observations
of 830 photometrically pre-selected candidate red giants in the
magnitude range of V=9-12. We develop a pipeline for automated
determination of the stellar atmospheric parameters from these spectra
and estimate Teff, logg, [Fe/H], microturbulence velocity, and
projected rotational velocities, vsin i, for the stars. The analysis
confirms that the candidate selection procedure yielded red giants
with very high success rate. We show that most of these stars are G
and K giants with slightly subsolar metallicity ([Fe/H]~-0.3dex).
An analysis of Mg abundances in the sample results in consistency of
the [Mg/Fe] vs [Fe/H] trend with published results.
Description:
Observations were conducted using the 2.1m telescope at the McDonald
Observatory and the Sandiford Cassegrain echelle spectrograph, which
provides a nominal resolution R=55000.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 77 841 *The atmospheric parameters derived with TAGRA
table1.dat 31 235 Normalized pseudo-continuum level
(between 5000 and 6000 Angstroms)
table2.dat 29 81 The spectral window around the iron lines
utilized in TAGRA
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Note on table3.dat: Right ascension was corrected by the author
after publication
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See also:
J/AJ/131/1784 : Astrometric Grid Giant Star Survey. I. (Bizyaev+, 2006)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 15 A15 --- Name Object name (GHHMM+DD.NNNNN or TycNNNN-NNNNN-N)
17- 18 I2 h RAh Hour of Right Ascension (J2000)
20- 21 I2 min RAm Minute of Right Ascension (J2000)
23- 26 F4.1 s RAs Second of Right Ascension (J2000)
28 A1 --- DE- Sign of the Declination (J2000)
29- 30 I2 deg DEd Degree of Declination (J2000)
32- 33 I2 arcmin DEm Arcminute of Declination (J2000)
35- 36 I2 arcsec DEs Arcsecond of Declination (J2000)
38- 42 F5.2 mag Bmag Apparent B band magnitude
44- 47 F4.2 mag AV The V band extinction
49- 52 I4 K Teff Derived effective temperature
54- 57 F4.2 [cm/s2] logg Log of the derived surface gravity
59- 63 F5.2 [Sun] Fe/H Derived metallicity
65- 68 F4.2 km/s Vturb Derived microturbulence velocity ξ
70- 74 F5.2 km/s vsini Derived apparent rotational velocity
76- 77 I2 --- S/N Signal-to-Noise ratio
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 0.1nm lam.S [4993/6003] Wavelength start; in Angstroms
9- 15 F7.2 0.1nm lam.E [4993/6003] Wavelength end; in Angstroms
17- 23 F7.5 --- <Cont> Mean pseudo-continuum: Arcturus and Sun
25- 31 F7.5 --- rms Root mean square
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 F7.2 0.1nm lam.S [5000/5917] Wavelength start; in Angstroms
9- 15 F7.2 0.1nm lam.E [5000/5917] Wavelength end; in Angstroms
17- 20 A4 --- Line Iron line identification (FeI or FeII)
22- 29 F8.3 0.1nm lambda [5000/5917] Line wavelength; in Angstroms
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History:
* 13-Jul-2012: From electronic version of the journal
* 07-Dec-2012: Right ascensions corrected by the author in table 3.
References:
Bizyaev et al., Paper I 2006AJ....131.1784B 2006AJ....131.1784B, Cat. J/AJ/131/1784
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Jul-2012