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J/A+A/373/987       Non-LTE Ga abundance in HgMn stars     (Zboril+ 2001)

Non-LTE gallium abundance in HgMn stars. Zboril M., Berrington K.A. <Astron. Astrophys. 373, 987 (2001)> =2001A&A...373..987Z
ADC_Keywords: Stars, peculiar ; Abundances, peculiar ; Stars, atmospheres Keywords: stars - abundances: atmospheres - chemically peculiar Abstract: We present, for the first time, the Non-LTE gallium equivalent widths for the most prominent gallium transitions as identified in real spectra and in (hot) mercury-manganese star. The common feature of the departure coefficients is to decrease near the stellar surface, the collision rates are dominant in many cases and the Non-LTE equivalent widths are generally smaller. In particular, the abundance difference as derived from UV and visual lines is reduced. The photoionization cross sections were computed by means of standard R-matrix formalism. Description: The file legend contains simple legend to files with photo-ionization cross sections for gallium. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file legend.dat 51 37 Legend of the gallium cross sections files xsec/* 0 36 Gallium cross sections
See also: VI/62 : Photoelectric absorption cross-sections (Balucinska-Church+, 1992) J/A+AS/109/125 : Photoionisation cross section (Verner+, 1995) Byte-by-byte Description of file: legend.dat
Bytes Format Units Label Explanations
1- 5 A5 --- Ion Ion 7- 8 I2 --- Number Gallium level number 10- 16 F7.5 Ry Eexc Excitation energy 18- 24 F7.5 Ry Eion ? Ionization energy 26- 28 I3 --- LCode Energy level code 30- 36 A7 --- Term Energy level designation 38- 44 A7 --- FileName File name in "xsec" subdirectory 46 I1 --- DCode ? [1/4] Degeneracy code 48- 51 I4 --- Nline ? Number of lines in the file
Byte-by-byte Description of file: xsec/3128.*
Bytes Format Units Label Explanations
3- 14 E12.6 --- Eph Photon energy 16- 24 E9.3 Mbarn sigma Photoionization cross section (G1)
Byte-by-byte Description of file: xsec/3129.* xsec/3130.* xsec/3131.*
Bytes Format Units Label Explanations
1- 8 F8.5 --- Eph Photon energy 10- 18 E9.3 Mbarn sigma1 Photoionization cross section (G1) 20- 28 E9.3 Mbarn sigma2 ? Photoionization cross section (G1) 30- 38 E9.3 Mbarn sigma3 ? Photoionization cross section (G1) 40- 48 E9.3 Mbarn sigma4 ? Photoionization cross section (G1) 50- 58 E9.3 Mbarn sigma5 ? Photoionization cross section (G1) 60- 68 E9.3 Mbarn sigma6 ? Photoionization cross section (G1) 70- 78 E9.3 Mbarn sigma7 ? Photoionization cross section (G1)
Global notes: Note (G1): Cross-sections are expressed in Megabarn (10-22m2). Zero means that for particular photon energy the cross section was not calculated.
Acknowledgements: Milan Zboril
(End) Patricia Bauer [CDS] 28-May-2001
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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