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Neutral gas in the vicinity of Herbig AeBe stars: What can we learn from red-shifted sodium absorption lines?

  • V. Grinin
  • C. Sorelli
  • A. Natta
Part III: Young Stellar Objects and Their Environment
Part of the Lecture Notes in Physics book series (LNP, volume 465)

Abstract

Variable, high-velocity red-shifted absorption components have been observed recently in the Na D lines of some Herbig Ae/Be stars with non-periodic Algol-type minima. The existence of neutral sodium in the environment of relatively hot stars, such as UX Ori (spectral type A3) cannot be easily explained. We present here the preliminary results of calculations aimed at exploring under which physical conditions a sizable amount of neutral sodium can survive in the immediate vicinity of such a star. Spectral lines of circumstellar origin of other elements are also discussed.

Keywords

Optical Depth Resonance Line Crimean Astrophysical Observatory Protoplanetary Disk Planet Formation 
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

© Springer-Verlag 1996

Authors and Affiliations

  • V. Grinin
    • 1
  • C. Sorelli
    • 2
  • A. Natta
    • 3
  1. 1.Crimean Astrophysical ObservatoryNauchnyUkraine
  2. 2.Dipartimento di AstronomiaUniversità di FirenzeFirenzeItaly
  3. 3.Osservatorio Astrofisico di ArcetriFirenzeItaly

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