Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...127..279c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 127, no. 2, Nov. 1983, p. 279-288.
Astronomy and Astrophysics
Astrophysics
52
B Stars, High Resolution, Spectral Resolution, Spectrum Analysis, Stellar Spectrophotometry, Variable Stars, H Alpha Line, Paschen Series, Shell Stars, Spectral Line Width, Stellar Spectra, Temporal Resolution
Scientific paper
An intensive search of rapid spectral variations with the time resolution from 15 s to 15 min is performed for 3 Be stars. In total, 57 spectra in Hα and 8 spectra in the λ8500 Å spectral region were obtained during 4 nights. Results of this study show that, in general, there are no rapid variations of Hα and of the lines of the λ8500 Å region (O I λ8446 Å, Paschen lines and the infrared triplet of Ca II). Only slow (time scale of several hours) changes in the Hα profile can occur at the limit of the detection (1 - 2% of Fc). Slower night-to-night changes of Hα are clearly detected.
Chalabaev A. A.
Maillard Jean Pierre
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