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Browsing by Author "Asplund, M"

Browsing by Author "Asplund, M"

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  • Abundance analyses of cool extreme helium stars 
    Pandey, G; Kameswara Rao, N; Lambert, D. L; Jeffery, C. S; Asplund, M (Royal Astronomical Society, 2001-07)
    Extreme helium stars (EHes) with effective temperatures from 8000 to 13000K are among the coolest EHes and overlap the hotter R CrB stars in effective temperature. The cool EHes may represent an evolutionary link between ...
  • Abundance analysis of extreme helium stars 
    Pandey, G; Kameswara Rao, N; Lambert, D. L; Jeffery, C. S; Asplund, M (Astronomical Society of India, 2000)
    High resolution spectra were obtained for a sample of hydrogen-deficient stars which are hotter than the R CrB stars and cooler among the extreme helium stars (EHe). We believe that these stars are transition objects ...
  • Abundance similarities between the RCrB star V854Cen and the born-again Sakurai's object 
    Asplund, M; Gustafsson, B; Kameswara Rao, N; Lambert, D. L (European Southern Observatory, 1998-04)
    The elemental abundances of the mildly hydrogen-deficient R Coronae Borealis (RCrB) star V854Cen have been estimated. The RCrB stars have been divided into majority and minority classes judging by their abundance patterns. ...
  • Commission 36: theory of stellar atmospheres 
    Landstreet, J. D; Asplund, M; Spite, M; Balachandran, S. B; Berdyugina, S. V; Hauschildt, P. H; Ludwig, H. G; Mashonkina, L. I; Nagendra, K. N; Puls, J; Randich, M. S; Tautvaisiene, G (International Astronomical Union, 2008-12)
    Commission 36 covers the whole field of the physics of stellar atmospheres. The scientific activity in this large subject has been very intense during the last triennium and led to the publication of a large number of ...
  • Commission 36: theory of stellar atmospheres 
    Spite, M; Landstreet, J. D; Asplund, M; Ayres, T. R; Balachandran, S. C; Dravins, D; Hauschildt, P. H; Kiselman, D; Nagendra, K. N; Sneden, C; Tautvaišiené, G; Werner, K (International Astronomical Union, 2007-12)
    The business meeting of Commission 36 was held during the General Assembly in Prague on 16 August. It was attended by about 15 members. The issues presented included a review of the work made by members of Commission 36, ...
  • The R Coronae Borealis stars - atmospheres and abundances 
    Asplund, M; Gustafsson, B; Lambert, D. L; Kameswara Rao, N (European Southern Observatory, 2000-01)
    An abundance analysis of the H-deficient and He- and C-rich R Coronae Borealis (R CrB) stars has been undertaken to examine the ancestry of the stars. The investigation is based on high-resolution spectra and line-blanketed ...
  • A stellar endgame - the born-again Sakurai's object 
    Asplund, M; Gustafsson, B; Lambert, D. L; Kameswara Rao, N (European Southern Observatory, 1997-05)
    The surface chemical composition of this remarkable star shows that it is hydrogen-deficient, carbon-rich and enriched in the light s-process elements. Spectra taken in May and October 1996 indicate a decrease in the surface ...

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