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Mg II profile variations of Zeta Aurigae (1983)

Chapman, R. D. ; Kondo, Y. ; Ahmad, I. A.

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Publication Date: 2011-08-18

Description: Variations in the Mg II 2800-A doublet of Zeta Aurigae have been observed. The Mg II profiles deviate from simple P-Cygni profiles in that they exhibit an absorption feature consistent with Chapman's (1981) interpretation of C IV absorption as evidence of a column of accretion onto the B-star component of the binary. The opening angle of the shock cone containing the accretion column is found to exceed 16 deg, implying a stellar wind velocity of approximately 67 km/s, unless the H II region temperature is unusually high. The turbulence velocity of the wind then appears to be about 33 km/s, compared to values of order 10 km/s previously determined closer to the K-star surface.

Keywords: ASTROPHYSICS

Type: Astronomy and Astrophysics (ISSN 0004-6361); 126; 2, Oc

Format: text

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