Probing Be star disks: New insights from Hα spectroscopy and detailed numerical models

Carol E. Jones, Christopher Tycner, Jessie Silaj, Ashly Smith, T. A. Aaron Sigut

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations


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.

Original languageEnglish
Title of host publicationActive OB stars
Subtitle of host publicationstructure, evolution, mass loss, and critical limits
PublisherCambridge University Press
Number of pages2
ISBN (Print)9780521198400
StatePublished - Jul 2010

Publication series

NameProceedings of the International Astronomical Union
ISSN (Print)1743-9213
ISSN (Electronic)1743-9221


  • Be
  • Circumstellar matter
  • Line: profiles
  • Radiative transfer
  • Stars: Activity
  • Stars: emission-line


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