2006/04/01 by R. P. Kudritzki, Rolf‐Peter Kudritzki, Miguel A. Urbaneja +2 · 1 citation
Physics and Astronomy · #Astro and Planetary Science #Astrobiology #Astronomy #Astronomy and Astrophysical Research #Astrophysics #Atmospheric sciences #Environmental science #Meteorology #Physics #Stars #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1017/s1743921306002857
8 pages, 12 figures; Proceedings, IAU Symposium No. 234, 2006, "Planetary Nebulae in our Galaxy and Beyond", M.J. Barlow and R.H. Mendez, eds
openalex publication_date 2006/04/01 · arxiv created 2006/08/03 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The progress over the last years in modelling the atmospheres and winds of PN central stars is reviewed. We discuss the effect of the inclusion of the blanketing by millions of metal lines in NLTE on the diagnostics of photospheric and stellar wind lines, which can be used to determine stellar parameters such as effective temperature, gravity, radius, mass loss rate and distance. We also refer to recent work on the winds of massive O-type stars, which indicates that their winds are possibly inhomogeneous and clumped. We investigate implications from this work on the spectral diagnostics of PN central stars and introduce a method to determine wind clumping factors from the relative strengths of H α and He II 4686. Based on new results we discuss the wind properties of CSPN.