Hydrogen Deficient Stars and Related Objects

Proceeding of the 87th Colloquium of the International Astronomical Union Held at Mysore, India, 10–15 Nevember 1985

  • Kurt Hunger
  • Detlef Schönberner
  • N. Kameswara Rao

Part of the Astrophysics and Space Science Library book series (ASSL, volume 128)

Table of contents

  1. Front Matter
    Pages i-xix
  2. Introduction

    1. William P. Bidelman
      Pages 3-5
  3. Basic Data

    1. Front Matter
      Pages 7-7
    2. J. S. Drilling
      Pages 9-22
  4. Hot Extreme Helium Stars

  5. Cool Hydrogen Deficient Stars

    1. Front Matter
      Pages 125-125
    2. A. V. Raveendran, N. Kameswara Rao, M. R. Deshpande, U. C. Joshi, A. K. Kulshrestha
      Pages 167-171

About this book

Introduction

The first helium star was discovered in 1942, the first scientific meeting on the subject, however, took place in 1985. The meeting was hence long overdue for, in the meantime, a substantial amount of material had been accumulated by a rather small, but active scientific community. Hence, it appeared necessary to review the field in order to define the subject, assess its present status and discuss future developments. Hydrogen deficiency is a widespread phenomenon, occurring in a large variety of stellar and nonstellar objects. It can be readily detected in B stars as these exhibit both hydrogen and helium lines, if the elements are present in appreciable amounts. It becomes less manifest in cool stars, where the temperature is too low to excite helium and where one has to devise indirect methods for proving hydrogen deficiency. Clearly, it was not possible to discuss the whole complex of hydrogen deficiency, i.e. in both stars and diffuse matter, but rather to concentrate on the issue of helium stars.

Keywords

Variation observatory planet spectroscopy star stars stellar

Editors and affiliations

  • Kurt Hunger
    • 1
  • Detlef Schönberner
    • 1
  • N. Kameswara Rao
    • 2
  1. 1.Institute for Theoretical Physics and ObservatoryUniversity of KielGermany
  2. 2.Indian Institute of AstrophysicsBangaloreIndia

Bibliographic information

  • DOI https://doi.org/10.1007/978-94-009-4744-3
  • Copyright Information Springer Science+Business Media B.V. 1986
  • Publisher Name Springer, Dordrecht
  • eBook Packages Springer Book Archive
  • Print ISBN 978-94-010-8608-0
  • Online ISBN 978-94-009-4744-3
  • Series Print ISSN 0067-0057
  • About this book
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