TY  - CONF
A1  - Cohen, David H.
A1  - Leutenegger, M. A.
A1  - Townsend, R. H. D.
T1  - Quantitative analysis of resolved X-ray emission line profiles of O stars
N2  - 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.
Y1  - 2008
UR  - https://publishup.uni-potsdam.de/frontdoor/index/index/docId/1644
UR  - https://nbn-resolving.org/urn:nbn:de:kobv:517-opus-18115
ER  -