Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011iaus..272..398j&link_type=abstract
Active OB stars: structure, evolution, mass loss, and critical limits, Proceedings of the International Astronomical Union, IAU
Astronomy and Astrophysics
Astronomy
Stars: Emission-Line, Be, Line: Profiles, Radiative Transfer, Circumstellar Matter, Stars: Activity
Scientific paper
Hα high resolution spectroscopy combined with detailed numerical models is used to probe the physical conditions, such as density, temperature, and velocity of Be star disks. Models have been constructed for Be stars over a range in spectral types and inclination angles. We find that a variety of line shapes can be obtained by keeping the inclination fixed and changing density alone. This is due to the fact that our models account for disk temperature distributions self-consistently from the requirement of radiative equilibrium. A new analytical tool, called the variability ratio, was developed to identify emission-line stars at particular stages of variability. It is used in this work to quantify changes in the Hα equivalent widths for our observed spectra.
Jones Carol E.
Sigut Thomas Allan Aaron
Silaj Jessie
Smith Ashly
Tycner Christopher
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