An extensive grid of mass fluxes for Galactic O stars

Details An extensive grid of mass fluxes for Galactic O stars An extensive grid of mass fluxes for Galactic O stars

2010-08-05

arxiv.org/abs/1008.1001v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

8 pages, 9 figure. Revised version submitted to Astronomy and Astrophysics

Scientific paper

A previously-described code for constructing moving reversing layers (MRL) is improved by replacing a two-parameter model for the radiative acceleration due to lines with a flexible non-parametric description, thus allowing a greater degree of dynamical consistency to be achieved in modelling turbulent transonic flow in the outer atmospheric layers of O stars. With this new code, mass fluxes J are computed at fifty-seven points in (T_eff, g)-space. Specifically, J's are computed for all Lanz-Hubeny (2003) NLTE atmospheres with T_eff (kK) \in (27.5, 55) and log g \leq 4.5. Differences with widely-used mass-loss formulae are emphasized, and opportunities for differential spectroscopic tests identified.

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