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Blue Variable Stars From the MACHO Database. I. Photometry and Spectroscopy of the Large Magellanic Cloud Sample

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Date

2002

Authors

Keller, S C
Bessell, Michael
Cook, Kem H
Geha, M
Syphers, D

Journal Title

Journal ISSN

Volume Title

Publisher

University of Chicago Press

Abstract

We present the photometric properties of 1279 blue variable stars within the Large Megallanic Cloud. Photometry is derived from the MACHO database. The light curves of the sample exhibit a variety of quasi-periodic and aperiodic outburst behavior. A characteristic feature of the photometric variation is that the objects are reddest when at maximum outburst. A subset of 102 objects were examined spectroscopically. Within this subset, 91% exhibited Balmer emission in at least one epoch, in some cases with spectacular spectral variability. The variability observed in the sample is consistent with the establishment and maintenance of the Be phenomenon.

Description

Keywords

Keywords: Galaxies: individual (Large Magellanic Cloud); Stars: emission-line, Be; Stars: variables: other

Citation

URI

http://hdl.handle.net/1885/75114

Collections

ANU Research Publications

Source

Astronomical Journal

Type

Journal article

Book Title

Entity type

Access Statement

License Rights

DOI

10.1086/342548

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