Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns

Details Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns

2007-06-27

arxiv.org/abs/0706.4028v1

Astron.Astrophys.469:1083-1100,2007

Astronomy and Astrophysics

Astrophysics

18 pages, 9 figures

Scientific paper

10.1051/0004-6361:20077192

Context. See abstract in the paper. Aims. See abstract in the paper. Methods. See abstract in the paper. Results. We present a homogeneous study of model atmosphere temperature structure, energy distribution, photometric indices in the uvbybeta and Delta_a systems, hydrogen line profiles, and the abundance determination procedure as it applies to CP stars. In particular, we found that Si, Cr and Fe are the main elements to influence model atmospheres of CP stars, and thus to be considered in order to assess the adequacy of model atmospheres with scaled solar abundances in application to CP stars. We provide a theoretical explanation of the robust property of the Delta_a photometric system to recognize CP stars with peculiar Fe content. Also, the results of our numerical tests using model atmospheres with one or several elements overabundant (Si and Fe by +1 dex, Cr by +2 dex) suggest that the uncertainty of abundance analysis in the atmospheres of CP stars using models with scaled abundances is less than plus/minus 0.25 dex. If the same homogeneous models are used for the abundance stratification analysis then we find that the uncertainty of the value of the vertical abundance gradient is within an 0.4 dex error bar. Conclusions. Model atmospheres with individual abundance patterns should be used in order to match the actual anomalies of CP stars and minimize analysis errors.

Affiliated with

Also associated with

No associations

Rating

Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns 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 Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Theoretical analysis of the atmospheres of CP stars. Effects of the individual abundance patterns will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-255946