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Non-LTE Analysis of CNO Lines in Vega

Published online by Cambridge University Press:  12 April 2016

Yoichi Takeda
Yoichi Takeda*
Affiliation:
Institute of Astronomy, The University of Tokyo, Mitaka, Tokyo, 181Japan

Abstract

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Non–LTE calculations for neutral C, N, and O are performed to determine the accurate abundances of these elements in the atmosphere of Vega by taking the non–LTE effects realistically into consideration. It is shown that C and O are mildly deficient by ∼0.2–0.3dex while N shows an appreciably large underabundance by ∼0.8dex.

Type
V. Theory of CP Star Photospheres
Information
International Astronomical Union Colloquium , Volume 138: Peculiar versus Normal Phenomena in A-Type and Related Stars , 1993 , pp. 491 - 495
Copyright
Copyright © Astronomical Society of the Pacific 1993

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