By quantitatively fitting simple emission line profile models that include both atomic opacity and porosity to the Chandra X-ray spectrum of ζ Pup, we are able to explore the trade-offs between reduced mass-loss rates and wind porosity. We find that reducing the mass-loss rate of ζ Pup by roughly a factor of four, to 1.5 × 10−6 M⊙ yr−1, enables simple non-porous wind models to provide good fits to the data. If, on the other hand, we take the literature mass-loss rate of 6×10−6 M⊙ yr−1, then to produce X-ray line profiles that fit the data, extreme porosity lengths – of h∞ ≈ 3 R∗ – are required. Moreover, these porous models do not provide better fits to the data than the non-porous, low optical depth models. Additionally, such huge porosity lengths do not seem realistic in light of 2-D numerical simulations of the wind instability.
Identifer | oai:union.ndltd.org:Potsdam/oai:kobv.de-opus-ubp:1811 |
Date | January 2007 |
Creators | Cohen, D. H., Leutenegger, M. A., Townsend, R. H. D. |
Publisher | Universität Potsdam, Extern. Extern |
Source Sets | Potsdam University |
Language | English |
Detected Language | English |
Type | InProceedings |
Format | application/pdf |
Rights | http://opus.kobv.de/ubp/doku/urheberrecht.php |
Page generated in 0.0015 seconds