TY  - JOUR
A1  - Thomas, Timon
A1  - Feldmeier, Achim
T1  - Radiative waves in stellar winds with line scattering
JF  - Monthly notices of the Royal Astronomical Society
N2  - Photospheric radiation can drive winds from hot, massive stars by direct momentum transfer through scattering in bound-bound transitions of atmospheric ions. The line radiation force should cause a new radiative wave mode. The dispersion relation from perturbations of the line force was analysed so far either in Sobolev approximation or for pure line absorption. The former does not include the line-driven instability, and the latter cannot account for upstream propagating, radiative waves. We consider a non-Sobolev line force that includes scattering in a simplified way, accounting however for the important line-drag effect. We derive a new dispersion relation for radiative waves, and analyse wave propagation using Fourier methods, and by numerical solution of an integro-differential equation. The existence of an upstream propagating, dispersive radiative wave mode is demonstrated.
KW  - hydrodynamics
KW  - radiative transfer
KW  - waves
KW  - stars: winds
KW  - outflows
Y1  - 2016
U6  - https://doi.org/10.1093/mnras/stw1008
SN  - 0035-8711
SN  - 1365-2966
VL  - 460
SP  - 1923
EP  - 1933
PB  - Oxford Univ. Press
CY  - Oxford
ER  -