Computer Science
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..224..580r&link_type=abstract
The A-Star Puzzle, held in Poprad, Slovakia, July 8-13, 2004. Edited by J. Zverko, J. Ziznovsky, S.J. Adelman, and W.W. Weiss,
Computer Science
7
Stars: Atmospheres, Stars: Abundances, Stars: Chemically Peculiar, Stars: Individual, (Hd 133792, Hd 188041, Hd 204411).
Scientific paper
We present results of stratification analyses for Mg, Si, Ca, Cr and Fe in the atmospheres of two Cr-type sharp-lined peculiar stars HD 133792 and HD 204411. Even in the absence of strong magnetic fields their atmospheres are stable which is confirmed by zero microturbulence. Both stars are slightly evolved, their log g ≈ 3.5, whereas their effective temperatures are 9200 and 8400 K, respectively. We find a moderate Cr and Fe stratification. However the abundances of these elements do not fall below the solar value throughout the atmosphere. Si and Ca are strongly stratified, in particular in HD 133792, with large underabundances in the outer atmospheric layers. Abundance stratifications derived for weakly magnetic Ap stars are compared with the empirically determined stratification in the atmospheres of strongly magnetic Ap stars in the same temperature range.
Bagnulo Stefano
Kochukhov Oleg
Leone Francesco
Ryabchikova Tanya
No associations
LandOfFree
Element stratification in the atmospheres of two weakly magnetic Cr-type Ap stars 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 Element stratification in the atmospheres of two weakly magnetic Cr-type Ap stars, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Element stratification in the atmospheres of two weakly magnetic Cr-type Ap stars will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1083203