Measurements of Balmer emission line profiles for southern Be stars. III - New data and radial velocities

Details Measurements of Balmer emission line profiles for southern Be stars. III - New data and radial velocities Measurements of Balmer emission line profiles for southern Be stars. III - New data and radial velocities

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26as...63...87d&link_type=abstract

Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 63, no. 1, Jan. 1986, p. 87-141.

Astronomy and Astrophysics

Astrophysics

73

B Stars, Balmer Series, Early Stars, Radial Velocity, Stellar Spectra, Variable Stars, Emission Spectra, H Lines, Line Shape, Rotating Disks, Stellar Mass Ejection

Scientific paper

The results of an analyses of more than 500 H alpha, H beta and H gamma line profiles from 55 bright Be and mostly early type Be shell-type stars over the period 1980-83 are reported. The photoelectrically-determined spectra were reduced for equivalent widths and half-widths at different epochs, 200 Balmer line profiles and variations, and radial velocities. The data supported a rotating disk model and a functional relationship between the equivalent width and the envelope diameter. Electron scattering at H alpha may have produced H alpha emission line half widths which were predominantly larger than H beta lines. Persistent asymmetries of particular Balmer emission lines and positive Balmer progressions of the radial velocity were taken to indicate a phase of continuous inflow through the envelope. Details of the observed emissions of each star are discussed.

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