Self-consistent coupling of radiative transfer and dynamics in dust-driven winds

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

8

Stars: Mass Loss, Circumstellar Matter, Hydrodynamics, Radiative Transfer

Scientific paper

Models of stationary dust-driven winds of late-type stars are investigated. The flow is described successively using three models which couple, in spherical symmetry, the grain-gas dynamics in a self-consistent way with radiative transfer. Complete radiative transfer including multiple scattering, absorption and thermal emission is taken into account to determine the temperature of dust grains which in turn governs their thermal emission. The medium is not necessarily optically thin. The first model is used to check one classical hypothesis, that where the gas and the grains expand at the same velocity, the flow is described by a one-fluid model. This model is then improved in a second model, to include complete momentum coupling between gas and grains by friction. Finally, a third model includes grains and gas coupled by friction as well as the effects of inertial force on grains. By means of a numerical iteration, dynamics and radiative transfer are coupled in order to achieve a self-consistent solution in all cases. Even for fairly low non-zero optical depths, coupling of radiation with dynamics is found to be important for wind models which are all highly sensitive to input data. In conclusion, approximations (position and momentum coupling) for the dynamics should be relaxed.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

Self-consistent coupling of radiative transfer and dynamics in dust-driven winds does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Self-consistent coupling of radiative transfer and dynamics in dust-driven winds, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-consistent coupling of radiative transfer and dynamics in dust-driven winds will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1099763

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.