Open AccessTwo new chemically peculiar stars with resolved, magnetically split lines ★
Author(s) -
Hubrig S.,
Nesvacil N.
Publication year - 2007
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2007.00310.x
Subject(s) - stars , astrophysics , physics , distance modulus , spectral line , abundance (ecology) , star (game theory) , ionization , magnetic field , a type main sequence star , ion , astronomy , metallicity , quantum mechanics , fishery , biology
ABSTRACT We report the discovery of resolved, magnetically split lines in two chemically peculiar stars, the SrEuCr star HD 92499 and the Bp SiCr star HD 157751. From FEROS spectra, we have measured a mean magnetic field modulus of 8.5 kG for HD 92499 and a mean magnetic field modulus of 6.6 kG for HD 157751. Both stars have small projected rotational velocities: v sin i = 3.0 km s −1 and 8.5 km s −1 , respectively. Our preliminary abundance analysis reveals an ionization imbalance of rare earths in HD 92499, indicating the abundance pattern typical of rapidly oscillating Ap stars. Cr and Fe are found to be strongly overabundant in HD 157751.