Identification of Peculiar A-Stars. Analysis of the Equivalent Widths of the 2786-2810Å Spectral Bands and the MgII 4481Å Line for 137 A-Stars

Details Identification of Peculiar A-Stars. Analysis of the Equivalent Widths of the 2786-2810Å Spectral Bands and the MgII 4481Å Line for 137 A-Stars Identification of Peculiar A-Stars. Analysis of the Equivalent Widths of the 2786-2810Å Spectral Bands and the MgII 4481Å Line for 137 A-Stars

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010vaoa.conf...91o&link_type=abstract

"Evolution of Cosmic Objects through their Physical Activity, Proceedings of the Conference dedicated to Viktor Ambartsumian's 1

Physics

Scientific paper

The dependence of the equivalent widths of the 2786-2810Å spectral bands and the MgII 4481Å line on the basic parameters (Teff, log g and [M/H]) for 137 bright A-stars shows that 60 of them are candidate peculiar stars. Given the similar behaviour of W (2800) and W (4481), it can be assumed that 34 of the stars are chemically peculiar stars. The anomalous values of W (2800), W (4481), and [M/H] vary over wide limits for the rest of the stars, possibly because they are binary.

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