Solar abundance corrections derived through 3D magnetoconvection simulations

Details Solar abundance corrections derived through 3D magnetoconvection simulations Solar abundance corrections derived through 3D magnetoconvection simulations

2010-06-01

arxiv.org/abs/1006.0231v2

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

ApJ accepted

Scientific paper

We explore the effect of the magnetic field when using realistic three-dimensional convection experiments to determine solar element abundances. By carrying out magnetoconvection simulations with a radiation-hydro code (the Copenhagen stagger code) and through a-posteriori spectral synthesis of three Fe I lines, we obtain evidence that moderate amounts of mean magnetic flux cause a noticeable change in the derived equivalent widths compared with those for a non-magnetic case. The corresponding Fe abundance correction for a mean flux density of 200 G reaches up to ~0.1 dex in magnitude. These results are based on space- and time-averaged line profiles over a time span of 2.5 solar hours in the statistically stationary regime of the convection. The main factors causing the change in equivalent widths, namely the Zeeman broadening and the modification of the temperature stratification, act in different amounts and, for the iron lines considered here, in opposite directions; yet, the resulting $|\Delta\log\epsilon_{\odot}(Fe)|$ coincides within a factor two in all of them, even though the sign of the total abundance correction is different for the visible and infrared lines. We conclude that magnetic effects should be taken into account when discussing precise values of the solar and stellar abundances and that an extended study is warranted.

Affiliated with

Also associated with

No associations

Rating

Solar abundance corrections derived through 3D magnetoconvection simulations 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 Solar abundance corrections derived through 3D magnetoconvection simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Solar abundance corrections derived through 3D magnetoconvection simulations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-511898