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The Early Type Stars

At this time when astronomers are being surprised by the discovery of objects which emit a fabulously large amount of energy, that is the quasi-stellar radio sources and the quasi-stellar galaxies, and when by the means of space vehicles X rays, gamma rays and cosmic rays are being observed to come...

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Bibliographic Details
Main Author: Underhill, A.B.
Format: eBook
Language:English
Published: Dordrecht Springer Netherlands 1966, 1966
Edition:1st ed. 1966
Series:Astrophysics and Space Science Library
Subjects:
Astrophysics
Online Access:
Collection: Springer Book Archives -2004 - Collection details see MPG.ReNa
Table of Contents:
  • 6 Radial-velocity studies
  • 7 Motions of the OB stars
  • IX/Spectroscopic Binaries
  • 1 Motion in an ellipse and the derivation of an orbit
  • 2 Catalogues of spectroscopic and eclipsing binaries
  • 3 The secular variation of orbital elements
  • 4 The falsification of velocity curves
  • 5 Estimates of the masses of the early type stars
  • 6 The observed mass-luminosity law
  • X/Spectrophotometric Techniques
  • 1 Photographic spectrophotometry
  • 2 Photoelectric scanning of spectral lines
  • 3 Correction for the instrumental profile
  • XI/The Interpretation of Normal Main-Sequence Early Type Spectra
  • 1 The problem
  • 2 Methods of analysis developed at Kiel and the results
  • 3 Methods of analysis developed at Michigan and the results
  • 4 Methods of analysis developed at Victoria and the results
  • 5 The helium abundance
  • 6 Other model atmosphere studies of early type stars
  • XII/Apparently Unusual Abundances in Early Type Stars
  • 1 The helium stars
  • 3 Narrow-band photometry by interference techniques
  • 4 Observations of OB stars from space vehicles
  • 5 The classification problem
  • V/Interstellar Material and the OB Stars
  • 1 The observation of selective extinction
  • 2 The diffuse interstellar absorption features
  • 3 The sharp interstellar lines
  • 4 Interstellar polarisation
  • VI/The Distribution of O and B Stars
  • 1 The general distribution of early type stars
  • 2 Comprehensive lists of O and B stars
  • 3 Some important groups of O and B stars
  • VII/The Helium Spectrum
  • 1 Spectroscopic notation and the energy level diagram of helium
  • 2 Stark broadening and the forbidden lines
  • 3 Non-equilibrium effects due to the presence of metastable levels
  • VIII/Wave-length Studies of Early Type Stars
  • 1 Measurements for wave length
  • 2 Standard wave lengths
  • 3 The refractivity ofair
  • 4 The correction of measured wave lengths to absolute values
  • 5 Wave-length and identification lists for O and B stars
  • I/An Introduction to the Early Type Stars and to the Means of Observing Them
  • 1 The early type stars
  • 2 Techniques by which information is obtained
  • 3 Stellar spectrographs
  • 4 The classification and description of early type spectra
  • II/Improved Systems of Spectral Classification
  • 1 Systems depending upon the visual inspection of spectrograms
  • 2 Systems depending upon measured quantities
  • III/The Luminosities of the O and B Type Stars
  • 1 General principles of calibrating luminosity criteria
  • 2 The calibration of the Victoria system of luminosity determination
  • 3 Tests of the Victoria system
  • 4 The calibration of the MK luminosity classes for B type stars
  • 5 The absolute magnitudes of the B type supergiants
  • 6 A comparison of Victoria and MK absolute magnitudes for B type stars
  • IV/Spectral Studies by Means of Photometry
  • 1 Spectral classification and the UBV system of photometry
  • 2 Classification by means of narrow-band filters
  • 2 Stars with strong lines of Pii and Piii
  • 3 The star ? Sculptoris
  • 4 B stars in the galactic halo
  • XIII/The Wolf-Rayet Stars
  • 1 Introduction
  • 2 The properties of the Wolf-Rayet stars
  • 3 The interpretation of Wolf-Rayet spectra
  • 4 Wolf-Rayet binaries
  • 5 Some unsolved problems raised by Wolf-Rayet stars
  • XIV/Supergiants and P Cygni
  • 1 The early type supergiants
  • 2 The variability of supergiants
  • 3 The interpretation of the spectra of supergiants
  • 4 P Cygni
  • XV/Be stars, Shell stars, and Of stars
  • 1 Stellar rotation and the Be stars
  • 2 The Be stars
  • 3 Shell stars
  • 4 The Of stars
  • XVI/The Beta Canis Majoris Stars
  • 1 Introduction
  • 2 Generalisations
  • 3 Observations of individual stars
  • 4Theoretical interpretation of the ? Canis Majoris stars
  • 5 Stars related to the ? Canis Majoris stars
  • Appendix/The Basis of the Theory of Normal Stellar Spectra
  • References
  • Index of Stars Mentioned in the Text
  • Index of Subjects

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