J/A+A/423/683 Sodium abundances in nearby disk stars (Shi+, 2004)
Sodium abundances in nearby disk stars.
Shi J.R., Gehren T., Zhao G.
<Astron. Astrophys., 423, 683-691 (2004)>
=2004A&A...423..683S 2004A&A...423..683S
ADC_Keywords: Stars, nearby ; Abundances, peculiar
Keywords: line: formation - line: profiles - stars: abundances -
stars: late-type - Galaxy: evolution
Abstract:
We present sodium abundances for a sample of nearby stars. All results
have been derived from NLTE statistical equilibrium calculations. The
influence of collisional interactions with electrons and hydrogen
atoms is evaluated by comparison of the solar spectrum with very
precise fits to the Na I line cores.
Description:
The spectra of our samples were obtained through the years 1995 to
2000 by Klaus Fuhrmann with the fiber-coupled Cassegrain echelle
spectrograph FOCES mounted at the 2.2m telescope of the Calar Alto
Observatory.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 42 98 Atmospheric parameters and sodium abundances of
the program stars
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Table1: Atomic data of Na lines.
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λ Transition loggf logC6
0.1nm
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5682.642 3p 2P01/2 4d 2D3/2 -0.72 -30.05
5688.214 3p 2P03/2 4d 2D5/2 -0.47 -30.05
5889.959 3s 2S1/2 3p 2P01/2 +0.11 -31.60
5895.932 3s 2S1/2 3p 2P03/2 -0.19 -31.60
6154.228 3p 2P01/2 5s 2S1/2 -1.57 -29.78
6160.751 3p 2P03/2 5s 2S1/2 -1.28 -29.78
8183.260 3p 2P01/2 3d 2D3/2 0.28 -30.73
8194.800 3p 2P03/2 3d 2D5/2 0.49 -30.73
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Note : loggf values and damping constants have been determined from solar
spectrum fits.
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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- 9 A9 --- Name Star name
11- 14 I4 K Teff Effective temperature
16- 19 F4.2 [cm/s2] logg Surface gravity
21- 25 F5.2 Sun [Fe/H] Metallicity
27- 30 F4.2 km/s xi Macroturbulence parameter (1)
32- 36 F5.2 Sun [Na/Fe]LTE LTE value of [Na/Fe] abundance
38- 42 F5.2 Sun [Na/Fe]NLTE NLTE value of [Na/Fe] abundance
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Note (1): Rotational velocities and macroturbulence data are the same as in
Fuhrmann (1998A&A...338..161F 1998A&A...338..161F, http://www.xray.mpe.mpg.de/~fuhrmann)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Aug-2005