J/A+A/454/895 Abundances of 26 barium stars. I. (Allen+, 2006)
Analysis of 26 barium stars I. Abundances.
Allen D.M., Barbuy B.
<Astron. Astrophys. 464, 895 (2006)>
=2006A&A...454..895A 2006A&A...454..895A
ADC_Keywords: Stars, barium ; Stars, atmospheres ; Abundances
Keywords: stars: chemically peculiar - stars: abundances
Abstract:
The abundances for Na, Al, alpha-, iron-peak, s-, and r-elements have
been derived by using spectrum synthesis for a sample of 26 barium
stars, including dwarf barium stars. High-resolution spectra were
obtained with the FEROS spectrograph at the ESO-1.52m Telescope, along
with photometric data with Fotrap at the Zeiss telescope at the LNA.
Description:
Table 5 shows the equivalent widths for Fe I and Fe II lines used to
the fundamental parameters determination. Table 15 shows the lines,
atomic constants, equivalent widths, and abundance results for the
elements other than iron.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 37 26 Star positions (from Simbad)
table5.dat 43 8580 Equivalent widths and atomic constants for Fe I
and Fe II lines
table15.dat 76 4186 Lines, equivalent widths, and abundances for the
elements other than iron
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See also:
J/A+A/454/917 : Abundances of 26 barium stars. II. (Allen+, 2006)
II/192 : UBV Photometry of Barium Stars (Watanabe+ 1993)
V/81 : Taxonomy of Barium Stars (Lu 1991)
J/A+A/319/881 : Ba II strength of barium stars (Gomez+ 1997)
J/A+A/321/L9 : Barium stars in the HR diagram (Bergeat+ 1997)
J/A+A/372/245 : Infrared properties of barium stars (Chen+, 2001)
J/AZh/79/909 : Chemical abundances in barium stars (Boyarchuk+, 2002)
J/A+A/397/257 : Chemical compositions of four barium stars (Liang+, 2003)
J/AZh/80/704 : Studies of classical barium stars (Antipova+, 2003)
J/AZh/81/658 : Equivalent widths of 9 barium stars (Antipova+, 2004)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name HD, HR, or BD designation
18- 19 I2 h RAh Right ascension (J2000)
21- 22 I2 min RAm Right ascension (J2000)
24- 27 F4.1 s RAs Right ascension (J2000)
29 A1 --- DE- Declination sign (J2000)
30- 31 I2 deg DEd Declination (J2000)
33- 34 I2 arcmin DEm Declination (J2000)
36- 37 I2 arcsec DEs Declination (J2000)
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name HD, HR, or BD designation
12- 16 A5 --- Ion Element code and ionization state
18- 25 F8.2 0.1nm Lambda Wavelength for Fe I and Fe II lines
28- 31 F4.2 eV EP Lower excitation potential
34- 39 F6.3 --- loggf Logarithm of oscillator strength
41- 43 I3 0.1nm EW ?=- Equivalent width for the star
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Byte-by-byte Description of file: table15.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name HD, HR, or BD designation
13- 17 A5 --- Element Element code and ionization state
20- 27 F8.3 0.1nm Lambda Wavelength of the line
30- 34 F5.3 eV EP Lower excitation potential
37- 43 F7.3 --- loggf Logarithm of oscillator strength
46- 50 A5 --- ref References for oscillator strength
53- 55 I3 0.1nm EW ? Equivalent width for the star
56 A1 --- f_EW [mb] Multiple or blended line (1)
57 A1 --- l_logEps [<] upper limit for oxygen
58- 62 F5.2 --- logEps ? logEps= log(nx/nH)+12
64 A1 --- l_[X/Fe]2 [<] upper limit for oxygen
65- 69 F5.2 --- [X/Fe]2 ? Abundance [X/Fe] (logarithmic scale) based
on Fe II lines
71 A1 --- l_[X/Fe]1 [<] upper limit for oxygen
72- 76 F5.2 --- [X/Fe]1 ? Abundance [X/Fe] (logarithmic scale) based
on Fe I lines
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Note (1): the flag means:
m = multiple line
b = the Ni line blended with O line
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Acknowledgements:
Dinah Moreira Allen, dinah(at)astro.iag.usp.br
(End) Patricia Vannier CDS 18-May-2006