Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26as...95..437d&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 95, no. 3, p. 437-460.
Astronomy and Astrophysics
Astrophysics
54
B Stars, Emission Spectra, Stellar Spectra, H Alpha Line, Line Spectra, Rotating Disks, Spectral Line Width, Stellar Envelopes, Stellar Models
Scientific paper
New high resolution high signal-to-noise emission line profiles were obtained for 37 bright southern and equatorial Be stars at H-alpha, H-beta, Fe II 5317 A, and He I 5876 A. The program combines measurements for stars already included in previous high-resolution studies with first-time high-resolution observations for faint stars newly added to the observing program. Characteristics of the profiles, including equivalent width, FWHM intensity, and peak radial velocity are noted, and profiles are classified according to their typical shapes. Several Be stars having v sin i less than 200 km/s were found to exhibit shell characteristics at H-alpha and are suspected to rotate at equatorial rotational velocities distinctly below their critical velocities.
Dachs Joachim
Hanuschik Reinhard W.
Hummel Wolfgang
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