Two new chemically peculiar stars with resolved magnetically split lines

Details Two new chemically peculiar stars with resolved magnetically split lines Two new chemically peculiar stars with resolved magnetically split lines

2007-03-09

arxiv.org/abs/astro-ph/0703228v1

Mon.Not.Roy.Astron.Soc.Lett.378:L16-L19,2007

Astronomy and Astrophysics

Astrophysics

4 pages, 6 figures, 1 table, accepted for publication as a letter to MNRAS

Scientific paper

10.1111/j.1745-3933.2007.00310.x

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 and 8.5 km/s, respectively. Our preliminary abundance analysis reveals ionisation imbalance of rare earths in HD 92499 indicating the abundance pattern typical of rapidly oscillating Ap stars. Cr and Fe are found strongly overabundant in HD 157751.

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