J/A+A/475/1003 Stellar parameters of G and K giant stars (Hekker+, 2007)
Precise radial velocities of giant stars.
III. Spectroscopic stellar parameters.
Hekker S., Melendez J.
<Astron. Astrophys. 475, 1003 (2007)>
=2007A&A...475.1003H 2007A&A...475.1003H
ADC_Keywords: Stars, giant ; Rotational velocities ; Parallaxes, trigonometric
Keywords: stars: abundances - stars: fundamental parameters - stars: rotation -
methods: observational - techniques: spectroscopic
Description:
We present results of a spectroscopic analysis of 366 G and K giant
stars. For 112 stars this is the first spectroscopic analysis. The
stars were selected for a radial velocity survey, which is currently
carried out at Lick observatory, using the Coude Auxiliary Telescope
in conjunction with the Hamilton Echelle spectrograph. For each star a
high signal to noise spectrum is available, which is used for the
present analysis. The Teff, logg and iron abundance are determined by
imposing excitation and ionisation equilibrium through stellar models.
The micro turbulence is obtained by requiring no dependence of Fe I
against equivalent width. The rotational velocity is obtained from a
comparison with data from Gray (1989ApJ...347.1021G 1989ApJ...347.1021G) and the macro
turbulence is derived using Gray (2005PASP..117..711G 2005PASP..117..711G).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 71 366 Spectroscopic stellar parameters for 366 G and
K giant stars
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See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/A+A/430/165 : Radial velocities for 6691 K and M giants (Famaey+, 2005)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP Hipparcos (Cat. I/239) number
8- 17 A10 --- HD/BD HD or BD number
19- 23 F5.2 mag Vmag Johnson V magnitude (1)
25- 29 F5.2 mas Plx Trigonometric parallax (1)
31- 34 F4.2 mas e_Plx Standard error in Plx (1)
36- 40 F5.3 mag B-V Johnson B-V colour index (1)
42- 45 I4 K Teff Effective temperature
47- 50 F4.2 [cm/s2] logg Surface gravity
52- 55 F4.2 km/s vmicro Micro turbulence velocity
57- 60 F4.2 [] A(Fe) Iron abundance (H=12)
62- 66 F5.2 km/s vsini ? Projected rotational velocity
68- 71 F4.2 km/s vmacro ? Macro turbulence velocity
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Note (1): All from Hipparcos catalogue (Perryman et al., Cat. I/239)
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Acknowledgements:
Saskia Hekker, saskia(at)strw.leidenuniv.nl
References:
Hekker et al., Paper I 2006A&A...454..943H 2006A&A...454..943H
Reffert et al., Paper II 2006ApJ...652..661R 2006ApJ...652..661R
(End) Patricia Vannier [CDS] 13-Sep-2007