NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
UV and X-ray emission in the interacting binary U CepheiThe active close binary U Cep has been monitored in the ultraviolet, using IUE, during 1.25 orbital cycles. The emission spectrum at the bottom of the primary total eclipse confirms earlier suggestions of an unexpected absence of the Hell 1640 A line. Stronger than expected emission in some other lines like NV, CII, CIV or AlIII, indicative of hot plasma, points out that some important differences still remain between the active components of RS CVn-type binaries and the mass-losing components of semidetached Algols. Simultaneous X-ray measurements, carried out with GINGA, indicated a low upper limit flux in the observed energy range (1 to 10 keV). A comparison with other binary systems or isolated stars is discussed in order to understand the obtained results.
Document ID
19930044940
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Gimenez, A.
(Inst. Nacional de Tecnica Aeroespacial Madrid, Spain)
Guinan, E. F.
(Villanova Univ. PA, United States)
Gonzalez-Riestra, R.
(IUE Observatory Madrid, Spain)
Date Acquired
August 16, 2013
Publication Date
January 1, 1993
Publication Information
Publication: Astronomy and Astrophysics Supplement Series
Volume: 97
Issue: 1
ISSN: 0365-0138
Subject Category
Astrophysics
Accession Number
93A28937
Funding Number(s)
CONTRACT_GRANT: NAG5-382
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available