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J/MNRAS/369/1677    Abundance analysis of LSS 3378            (Pandey+, 2006)

Abundance analysis of the cool extreme helium star LSS 3378. Pandey G., Reddy B.E. <Mon. Not. R. Astron. Soc., 369, 1677-1682 (2006)> =2006MNRAS.369.1677P
ADC_Keywords: Stars, variable ; Abundances, peculiar Keywords: stars: abundances - stars: AGB and post-AGB - stars: chemically peculiar - stars: evolution Abstract: Abundance analysis of the cool extreme helium (EHe) star LSS 3378 is presented. The abundance analysis is done using local thermodynamic equilibrium (LTE) line formation and LTE model atmospheres constructed for EHe stars. Description: The spectrum of LSS 3378 was obtained on 2002 June 19 with the 4-m Blanco telescope and the Cassegrain echelle spectrograph at Cerro Tololo Inter-American Observatory (CTIO) in Chile. Three exposures of 25-min each, spectra covering the wavelength interval 50008200Å without gaps, were recorded at a resolving power of R=30000. The Image Reduction and Analysis Facility (IRAF) software packages were used to reduce the recorded spectra. Objects: ------------------------------------------------- RA (2000) DE Designation(s) ------------------------------------------------- 15 38 59.4 -48 35 57 LSS 3378 = V* V354 Nor ------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 55 136 Lines used to derive elemental abundances in LSS 3378
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Ion Ion (1) 8- 14 F7.2 0.1nm Lambda Wavelength of the line 16- 20 F5.2 eV EPlow Lower excitation potential 24- 28 F5.2 [-] loggf Oscillator strength 32- 34 I3 0.1nm EW ? Measured equivalent width 35 A1 --- n_EW [S] S: Spectrum synthesis 40- 44 F5.2 [-] logEps Individual elemental abundance (2) 48- 55 A8 --- r_loggf loggf reference (3)
Note (1): Mean abundance values as follows: C I = 9.53 ± 0.18 C II = 9.44 ± 0.11 N I = 8.23 ± 0.16 N II = 8.26 ± 0.20 O I = 9.29 ± 0.15 Ne I = 9.55 ± 0.30 Na I = 6.69 ± 0.26 Mg II = 5.97 ± 0.11 Al II = 5.70 ± 0.45 Al III = 6.04 ± 0.01 Si II = 6.62 ± 0.23 P II = 4.85 ± 0.12 S II = 6.52 ± 0.21 Ti II = 4.29 ± 0.15 Cr II = 4.47 ± 0.13 Mn II = 4.57 ± 0.24 Fe II = 6.11 ± 0.27 Zr II = 3.51 ± 0.13 Note (2): Normalized such that log[Sum{muieps(i)}]=12.15, where mui is the atomic weight of element i. Note (3): References as follows: Jeffery = Jeffery et al. (2001MNRAS.321..111J) Kurucz = Kurucz's data base Luck = Compilations by R.E. Luck NIST = NIST data base Thevenin = Thevenin (1989A&AS...77..137T, 1990A&AS...82..179T) Wiese = Wiese et al. (1996, J. Phys. Chem. Ref. Data, Monograph No. 7)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Feb-2007
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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