SIMBAD references

1997A&A...323..524K - Astronomy and Astrophysics, volume 323, 524-528 (1997/7-2)

On the NLTE plane-parallel and spherically symmetric model atmospheres of helium rich central stars of planetary nebulae.


Abstract (from CDS):

The assumption of plane-parallel geometry is tested for the case of NLTE model atmospheres of central stars of planetary nebulae. As a test example, two hot hydrogen deficient central stars, namely LoTr4 and K1-27 were used. It was found that for atmospheric parameters of the star K1-27, namely Teff=100000K, gravity logg=6.5, stellar mass 0.52M, and abundance of hydrogen nH/nHe=0.2, the sphericity effects are very small. On the other hand, atmospheric parameters of LoTr4, namely Teff=120000K, gravity logg=5.5, stellar mass 0.65M, and abundance of hydrogen nH/nHe=0.5, yield much greater extension and remarkable sphericity effects.

Abstract Copyright:

Journal keyword(s): stars: atmospheres - line: profiles - radiative transfer - planetary nebulae: general

Simbad objects: 2

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