Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26as...78..487d&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 78, no. 3, June 1989, p. 487-510.
Astronomy and Astrophysics
Astrophysics
21
B Stars, Spectral Energy Distribution, Stellar Envelopes, Stellar Spectra, Variable Stars, Balmer Series, Hydrogen Recombinations, Spectral Resolution, Stellar Models
Scientific paper
Spectrophotometric observations of 17 bright southern and equatorial early Be stars are reported and analyzed. Data obtained at 320-850 nm with spectral resolution 1 nm using a spectrum scanner on the 61-cm Cassegrain telescope at ESO in 1978 and 1982 are presented in extensive tables and graphs and characterized in detail, and the principal stellar parameters are calculated by fitting the data with theoretical energy distributions. It is found that the optical depths of Be-star envelopes increase from small values in the Paschen continuum to near unity at the short-wave side of the Balmer discontinuity; the envelope electron temperature and density are estimated as 9500 K and 10 to the 12th/cu cm, respectively.
Dachs Joachim
Kaiser David
Poetzel Ralf
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