Stellar Wind Bubbles: H-Deficient Stars and X-Ray Spectra

Details Stellar Wind Bubbles: H-Deficient Stars and X-Ray Spectra Stellar Wind Bubbles: H-Deficient Stars and X-Ray Spectra

Jan 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003rmxac..15...41m&link_type=abstract

Winds, Bubbles, and Explosions: a conference to honor John Dyson, Pátzcuaro, Michoacán, México, September 9-13, 2002 (Eds. S. J.

Astronomy and Astrophysics

Astronomy

Hydrodynamics, Ism: Bubbles, Planetary Nebulae: General, Stars: Agb And Post-Agb, Stars: Wolf-Rayet, X-Rays: Ism

Scientific paper

We present simplified one-dimensional numerical models for stellar wind bubbles (SWB), investigating two aspects: the effect of H-deficient winds, such as observed in [WR]-type centrals stars of planetary nebulae (PN) and massive Wolf-Rayet stars (WR), and the X-ray spectra produced by SWBs. For the H-deficient winds, we find that the extra cooling caused by the extremely high metal abundances influences the structure and evolution of their SWBs, although they remain mostly energy-driven. For the X-ray spectra we find that a standard SWB model cannot explain the observed spectra, and some extra physical effect is needed. We show that thermal conduction with low efficiency can be this effect.

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