Distribution of elements in rings on the surfaces of Epsilon Ursae Majoris and Omega Aurigae

Details Distribution of elements in rings on the surfaces of Epsilon Ursae Majoris and Omega Aurigae Distribution of elements in rings on the surfaces of Epsilon Ursae Majoris and Omega Aurigae

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...233..503r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 233, no. 2, July 1990, p. 503-512. Research supported by NSERC.

Astronomy and Astrophysics

Astrophysics

34

Astronomical Maps, Auriga Constellation, Doppler Effect, Peculiar Stars, Stellar Composition, Stellar Spectra, Chromium, Iron, Line Spectra, Silicon, Stellar Structure

Scientific paper

The surface distributions of iron and chromium on Epsilon UMa and of silicon, iron, and chromium on Omega Aur are calculated. Some of these distributions may be interpreted in terms of ring structures. For Epsilon UMa, the loci of enhanced equivalent widths of iron and chromium lines can be represented by two rings with radii of about 50 deg. One of the rings is centered on a pole at a longitude of 10 deg and a latitude of 45 deg, while the other is symmetrically placed with respect to the equator of the star.

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