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2 results

  • Stellar masers, circumstellar envelopes and supernova remnants

  • Athol J. Kemball
  • Journal:
    Proceedings of the International Astronomical Union / Volume 3 / Issue S242 / March 2007
    Published online by Cambridge University Press:
    01 March 2007, pp. 236-245
    Print publication:
    March 2007
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  • This paper reviews recent advances in the study or circumstellar masers and masers found toward supernova remnants. The review is organized by science focus area, including the astrophysics of extended stellar atmospheres, stellar mass-loss processes and outflows, late-type evolved stellar evolution, stellar maser excitation and chemistry, and the use of stellar masers as independent distance estimators. Masers toward supernova remnants are covered separately. Recent advances and open future questions in this field are explored.

  • The physical nature of WR8 (WN6/WC4)

  • Paul A. Crowther, Linda J. Smith, Allan J. Willis
  • Journal:
    Symposium - International Astronomical Union / Volume 163 / 1995
    Published online by Cambridge University Press:
    07 August 2017, pp. 152-153
    Print publication:
    1995
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  • An analysis of the UV, optical and IR spectra of the composite WN/WC star WR8 is presented using the WR standard model. All spectral features are consistent with formation in the same stellar wind. The stellar parameters are T*=49kK, log L/L⊙=5.1, log Ṁ = −4.2, v∞=1590 km s−1. The derived chemistry (C/He=0.025, C/N=3, C/O=4) is intermediate between normal WN and WC stars.