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Variable Stars in the Sculptor Dwarf Galaxy

Published online by Cambridge University Press:  15 February 2018

C. G. Goldsmith
C. G. Goldsmith*
Affiliation:
York University, North York, Ontario, Canada

Extract

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This project was initiated in 1985 by James Nemec (University of Washington) and Nicholas Suntzeff (C.T.I.O.). The goal was to study the system of ∼600 variable stars in the Sculptor dwarf galaxy. In 1987 the author became the recipient of the plate collection, which formed the basis for his Ph.D. dissertation. In this paper preliminary results are presented. Briefly, 612 stars were studied, of which 432 are van Agt (1978) stars and 180 are newly discovered variable stars. A total of 381 stars are confirmed variables. Most of these are RR Lyraes, but many anomalous Cepheids and some candidate eclipsing variables were also found. Several candidate double-mode RR Lyrae stars were also identified. The mean period of the ab-type RR Lyrae stars is 0.60±0.08 day, and the mean period of the c-type stars is 0.35±0.03 day, not unlike the mean periods of other nearby dwarf galaxies.

Type
Windows on the Instability Strip
Information
International Astronomical Union Colloquium , Volume 139: New Perspectives on Stellar Pulsation and Pulsating Variable Stars , 1993 , pp. 358
Copyright
Copyright © Cambridge University Press 1993

References

Sandage, A., 1981, Astrophys. J. 248, 168.CrossRefGoogle Scholar
van Agt, S., 1978, Publ.David Dunlap Observatory, Vol.3 (number 7).Google Scholar