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2 results

  • 10 - Analysis of Stellar Continua

  • David F. Gray
  • Book:
    The Observation and Analysis of Stellar Photospheres
    Published online:
    05 January 2022
    Print publication:
    16 December 2021, pp 182-209

  • Summary

    The energy distribution, or how the starlight is distributed in wavelength across wide wavelength spans, depends strongly on the temperature of the star.In the visible spectral region, we see the Paschen continuum and a short portion of the Balmer continuum.How the flux in these regions is measured and calibrated is a central theme of this chapter.We look at both observed and calculated energy distributions with the aim of deriving stellar temperatures and surface gravities, and eventually radii.

  • Basic parameters and properties of Wolf-Rayet stars

  • Karel A. van der Hucht
  • Journal:
    Symposium - International Astronomical Union / Volume 163 / 1995
    Published online by Cambridge University Press:
    07 August 2017, pp. 7-14
    Print publication:
    1995
    • Article
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  • The numbers, space distribution and energy distributions of Wolf-Rayet stars are reviewed. The numbers of known WR stars in the Galaxy, the LMC and the SMC are 189, 114, and 10, respectively. Distances and galactic distributions determined by various authors are compared and consequences for with evolutionary studies are discussed. Finally energy distributions from the optical to the radio regime are reviewed.