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J/A+A/353/287       The R CrB stars                             (Asplund+, 2000)

The R Coronae Borealis stars - atmospheres and abundances Asplund M., Gustafsson B., Lambert D.L., Rao N.K. <Astron. Astrophys. 353, 287 (2000)> =2000A&A...353..287A
ADC_Keywords: Stars, variable ; Abundances Keywords: stars: abundances - stars: AGB and post-AGB - stars: evolution - stars: variables: general - stars: individual: R Coronae Borealis - stars: individual: Sakurai's object - Description: Adopted line data, measured equivalent widths and derived elemental abundances for the individual lines observed in R Coronae Borealis and Extreme Helium stars. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 61 19 Star positions (from SIMBAD database) table3.dat 54 2015 *Adopted line data and measured equivalent widths in RCrB and EHe stars.
Note on table3.dat: It should be noted that some of the lines listed were only used in the determinations of the stellar parameters and not in the final abundance determinations. Furthermore, several lines were later discarded due to suspected blends or uncertain gf-values. No abundances are given for the HeI and CII lines since they have mainly been used as diagnostics of the stellar parameters using spectral synthesis. The CI lines consist of two groups with gf-values taken for the first group (with increasing wavelengths) from the Opacity Project (Luo & Pradhan 1989, J. Phys. B. 22, 3377; Seaton et al., 1994, Cat. VI/80) and the second group (also with increasing wavelengths) from Kurucz & Peytremann (1975, , SAO Special Report 362). The latter lines have not been used for the abundance determinations due to their significantly larger scatter.
See also: VI/80 : Opacities from the Opacity Project (Seaton+, 1995) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 13 A13 --- Star Star name 16- 17 I2 h RAh Right ascension (J2000) 19- 20 I2 min RAm Right ascension (J2000) 22- 25 F4.1 s RAs Right ascension (J2000) 27 A1 --- DE- Declination sign (J2000) 28- 29 I2 deg DEd Declination (J2000) 31- 32 I2 arcmin DEm Declination (J2000) 34- 35 I2 arcsec DEs Declination (J2000) 39- 43 F5.2 mag Bmag ? B magnitude 45- 49 F5.2 mag Vmag ? V magnitude 51- 61 A11 --- SpType Spectral type (from Simbad)
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 2 A2 -- Elem Chemical element 4 I1 --- Ion [1/2] Ionization stage 6- 12 F7.2 0.1nm lambda Wavelength {lamda} in Å 14- 18 F5.2 eV Exc Lower excitation potential 20- 25 F6.2 --- loggf Oscillator strength 27 A1 --- l_EW Limit flag on EW 28- 32 F5.1 0.1pm EW Equivalent width (in mÅ) 34 A1 --- l_Abund Limit flag on Abund 35- 39 F5.2 [-] Abund ? Logarithmic elemental abundance (H=12) 42- 54 A13 --- Star Star identification
Acknowledgements: Martin Asplund
(End) M. Asplund [Uppsala, Sweden] 01-Nov-1999
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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