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C IV and Si IV in IUE spectra of normal B8-A0 stars: UV identified Be/Ae starsArchival IUE high dispersion spectra of 42 B6-A2 stars within 200 pc were surveyed. Five of the program stars show significant C IV and Si IV absorption. All of the stars with detected C IV have v sin i less than or = 190 km/sec. Sharp absorption cores are present in Si II lambda 1533 in 3 of the objects, indicating that these are previously unrecognized shell stars. Three of the stars have variable or asymmetric C IV profiles which are consistent with the C IV and Si IV being produced in stellar winds. One star has C IV in the form of a shortward-shifted discrete absorption component, similar to those observed in Be stars. The data are compared with similar data for Be and B shell stars.
Document ID
19890001393
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Chiu, Weihsueh A.
(Atholton High School Columbia, MD., United States)
Grady, C. A.
(Catholic Univ. of America Washington, DC., United States)
Bruhweiler, Frederick C.
(Catholic Univ. of America Washington, D.C., United States)
Date Acquired
September 5, 2013
Publication Date
June 1, 1988
Publication Information
Publication: ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1
Subject Category
Astronomy
Accession Number
89N10764
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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