A survey of Be stars in the 7500-8800 A region

Astronomy and Astrophysics – Astrophysics

Scientific paper

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B Stars, Beryllium, Spectral Line Width, Stellar Atmospheres, Stellar Spectra, Abundance, Astronomical Catalogs, Infrared Radiation, Shell Stars

Scientific paper

This survey covers the spectra of over 97 Be stars observed at 50 and 230 A/mm plate factors with a Reticon in the 7500-8800 A region. Equivalent widths were measured for the strongest lines present in this region. Although the Be stars have been well studied in the classic 3800-4800 A region, there exist fewer studies of the 7500-8800 A region, which shall be referred to as the 'near-infrared'. The interest of the near infrared region lies in the fact that several strong features are present, namely the higher lines of the Paschen series of H I, two O I features, and the Ca II triplet. The behavior of these features is often different from that observed in normal stars, for instance the Ca II. It is the purpose of the present paper to provide a systematic survey. To achieve this, a sample of 100 Be and B-type shell stars selected from Jaschek et al. (1980) have been observed.

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