SIMBAD references

2000MNRAS.316...19L - Mon. Not. R. Astron. Soc., 316, 19-32 (2000/July-3)

Surface abundances of light elements for a large sample of early B-type stars - I. Spectral observations of 123 stars: measurements of hydrogen and helium lines, infrared photometry.

LYUBIMKOV L.S., LAMBERT D.L., RACHKOVSKAYA T.M., ROSTOPCHIN S.I., TARASOV A.E., POKLAD D.B., LARIONOV V.M. and LARIONOVA L.V.

Abstract (from CDS):

High-resolution spectral observations of 123 B0-B5 stars in the main sequence evolutionary phase were obtained at two observatories, namely the McDonald Observatory (McDO) and the Crimean Astrophysical Observatory (CrAO). Accurate equivalent widths W of two Balmer lines, Hβ and Hγ, and ten Hei lines were obtained for all the stars, as well as of the Heiiλ4686 line for the hottest ones. A careful analysis of the measured equivalent widths was performed. It is shown that there is a very good agreement between the W values derived from the McDO and CrAO spectra for 14 common stars. A comparison with published data leads to the conclusion that the W values measured earlier by some authors for strong Hei lines are very likely to be underestimated. Infrared photometric observations in the J, H, and K bands were performed for 70 programme stars. All these data will be used in other papers: in particular for the Teff and logg determination and for the He, C, N and O abundance analyses.

Abstract Copyright: The Royal Astronomical Society

Journal keyword(s): stars: abundances - stars: atmospheres - stars: early-type

Simbad objects: 123

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