Astrophysics and Space Science

, Volume 134, Issue 1, pp 1–13 | Cite as

The determination of physical parameters for circumstellar clouds

  • G. A. Gurzadyan
  • S. S. Rustambekova


The possibility of the detection of circumstellar clouds around hot stars have been shown based on the analysis of observed equivalent widths of resonance line 2852 Mgi of interstellar origin. An attempt has been made to combine two methods, earlier suggested — ‘Method of Doublet 2800 Mgii’ and ‘Method of Depression’ — for the determination of the parameters of circumstellar clouds. The sequence of the determination of these parameters is illustrated on the application of this combined method for circumstellar clouds around five hot stars. The value of the mean absorption coefficientk0 for the system of resonance lines in the region of depression ∼2400 Å, is obtained. An application of the conception of spectral classification of circumstellar clouds has been realized.


Depression Physical Parameter Resonance Line Combine Method Equivalent Width 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© D. Reidel Publishing Company 1987

Authors and Affiliations

  • G. A. Gurzadyan
    • 1
  • S. S. Rustambekova
    • 1
  1. 1.Polytechnic InstituteErevanArmenian SSR, U.S.S.R.

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