Micro- and macroturbulence derived from 3D hydrodynamical stellar atmospheres

Details Micro- and macroturbulence derived from 3D hydrodynamical stellar atmospheres Micro- and macroturbulence derived from 3D hydrodynamical stellar atmospheres

2009-09-15

arxiv.org/abs/0909.2831v3

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

Paper presented at IAU General Assembly Joint Discussion 10 "3D views on cool stellar atmospheres: theory meets observation";

Scientific paper

The theoretical prediction of micro- and macroturbulence (xi_mic and xi_mac) as a function of stellar parameters can be useful for spectroscopic work based on 1D model atmospheres in cases where an empirical determination of xi_mic is impossible due to a lack of suitable lines and/or macroturbulence and rotational line broadening are difficult to separate. In an effort to exploit the CIFIST 3D model atmosphere grid for deriving the theoretical dependence of xi_mic and xi_mac on effective temperature, gravity, and metallicity, we discuss different methods to derive xi_mic from the numerical simulations, and report first results for the Sun and Procyon. In both cases the preliminary analysis indicates that the microturbulence found in the simulations is significantly lower than in the real stellar atmospheres.

Affiliated with

Also associated with

No associations

Rating

Micro- and macroturbulence derived from 3D hydrodynamical stellar atmospheres 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 Micro- and macroturbulence derived from 3D hydrodynamical stellar atmospheres, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Micro- and macroturbulence derived from 3D hydrodynamical stellar atmospheres will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-556176