Astronomy and Astrophysics – Astronomy
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005astl...31..327g&link_type=abstract
Astronomy Letters, vol. 31, Issue 5, p.327-334
Astronomy and Astrophysics
Astronomy
4
Stars—, Variable And Peculiar - Stellar Chemical Composition
Scientific paper
We analyzed the chemical composition of the chemically peculiar (CP) star HD 0221=43 Cas using spectra taken with the NES spectrograph of the 6-m telescope with a spectral resolution of 45 000. The Hβ line profile corresponds most closely to T eff = 11 900 K and log g = 3.9. The rotational velocity is v e sin i = 27 ± 2 km s-1, and the microturbulence is ξ t = 1 km s-1. The results of our abundance determination by the method of synthetic spectra show that the star has chemical anomalies typical of SrCrEu stars, although its effective magnetic field is weak, B e < 100 G. For silicon, we obtained an abundance distribution in atmospheric depth with a sharp jump of 1.5 dex at an optical depth of log τ 5000 = -0.3 and with silicon concentration in deep atmospheric layers. Similar distributions were found in the atmospheres of cooler stars with strong and weak magnetic fields. A comparison of the chemical peculiarities in HD 10221 with known CP stars with magnetic fields of various strengths leads us to conclude that a low rotational velocity rather than amagnetic field is the determining factor in the formation mechanism of chemical anomalies in the atmospheres of CP stars.
Chountonov Georgij A.
Glagolevskii Yu. V.
Ryabchikova Tanya A.
No associations
LandOfFree
Magnetic Field and Chemical Composition of the Peculiar Star HD 10221 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 Magnetic Field and Chemical Composition of the Peculiar Star HD 10221, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magnetic Field and Chemical Composition of the Peculiar Star HD 10221 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-768251