Improved velocity law parameterization for hot star winds

Abstract

The velocity law of hot star winds is usually parameterized via the so-called beta velocity law. Although this parameterization stems from theoretical considerations, it is not the most accurate description of the wind velocity law that follows from hydrodynamical calculations. We show that the velocity profile of our hydrodynamical wind models is described much better by polynomial approximation. This approximation provides a better fit than the beta velocity law already for the same number of free parameters.

3 pages, 2 figures, accepted for publication in Astronomy & Astrophysics

Cited by in corpus (9)

• Driving classical Wolf-Rayet winds: A Γ- and Z-dependent mass-loss
• X-ray irradiation of the winds in binaries with massive components
• Stellar wind models of subluminous hot stars
• X-ray photoionized bubble in the wind of Vela X-1 pulsar supergiant companion
• New mass-loss rates of B supergiants from global wind models
• Wind inhibition by X-ray irradiation in HMXBs: the influence of clumping and the final X-ray luminosity
• Hot Grain Dynamics by Electric Charging and Magnetic Trapping in Debris Disks
• Diffusive shock acceleration at oblique high Mach number shocks
• X-ray irradiation of the stellar wind in HMXBs with B supergiants: Implications for ULXs