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Observations of CNO Processed Matter in Massive Interacting Binary Systems

Published online by Cambridge University Press:  07 August 2017

Ronald S. Polidan  and
Richard A. Wade
Ronald S. Polidan
Affiliation:
Laboratory for Astronomy and Solar Physics, Code 681 NASA - Goddard Space Flight Center Greenbelt, MD 20771, USA.
Richard A. Wade
Affiliation:
Department of Astronomy and Astrophysics, Pennsylvania State University 525 Davey Laboratory, University Park, PA 16802, USA.

Abstract

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Ultraviolet observations for nine massive Algol systems (DH Her, TU Mon, AU Mon, Z Ori, RY Per, IZ Per, V356 Sgr, RZ Sct and ET Tau) obtained during their primary eclipses with the IUE spacecraft are discussed. Four systems, AU Mon, Z Ori, IZ Per, and RZ Sct, yielded no useful data on the presence of UV emission lines. Four binary systems DH Her, TU Mon, RY Per, and V356 Sgr, displayed a prominent emission spectrum with the notable exception of carbon lines; only one of the studied systems, ET Tau, showed carbon emission. Analysis of these data strongly supports the suggestion that the lack of carbon emission lines in these systems is the product of an inherent carbon deficiency in the transferred material and not due to any ionization effects in the gas. This carbon deficiency is the result of the CNO processed layers of the secondary being exposed as a result of mass transfer. The IUE data on TU Mon also indicates that this system undergoes a total, rather than partial, eclipse.

Type
Oral and Contributed Papers
Information
Symposium - International Astronomical Union , Volume 151: Evolutionary Processes in Interacting Binary Stars , 1992 , pp. 351 - 354
Copyright
Copyright © Kluwer 1992 

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