SIMBAD references

1996A&A...308..886K - Astronomy and Astrophysics, volume 308, 886-894 (1996/4-3)

Abundance analysis of roAp stars. I. α Circini.

KUPKA F., RYABCHIKOVA T.A., WEISS W.W., KUSCHNIG R., ROGL J. and MATHYS G.

Abstract (from CDS):

Based on high resolution, low noise spectroscopy in the spectral region from 4200A to 6700A we derived Teff=7900±200K, logg=4.2±0.15, vsin(i)=12.5(-0.5,+1.5)km/s, and elemental abundances for the rapidly oscillating (ro)Ap star αCir(HD128898, HR5463). We used the spectrum synthesis and the equivalent width technique and confirmed the presence of a magnetic field in αCir. The underabundance of C, N, and O, and the overabundances of rare-earth and some other heavy elements are comparable to other cool Ap-stars. The most important peculiarity is that of Co, which is almost as overabundant as Cr, the most overabundant iron peak element in cool Ap-stars.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: chemically peculiar - stars: magnetic fields - stars: individual: α Cir - stars: fundamental parameters

Simbad objects: 4

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