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Faculty Publications
Beat Cepheid Period Ratios From Opal Opacities
Document Type
Article
Journal/Book/Conference Title
Astronomical Journal
Volume
114
Issue
3
First Page
1183
Last Page
1189
Abstract
The discovery of a large number of beat Cepheids in the Large Magellanic Cloud in the MACHO survey provides an opportunity to compare the characteristics of such Cepheids over a range of metallicities. We produced a large grid of linear nonadiabatic pulsation models using the OPAL opacity tables and with compositions corresponding to those of the Milky Way, and the Large and Small Magellanic Clouds. Using the relationship between the period ratio and the main pulsation period, we are able to define a range of models which correspond to the observed beat Cepheids, and thereby constrain the physical characteristics of the LMC beat Cepheids. We are also able to make some predictions about the nature of the yet-to-be-discovered SMC beat Cepheids. © 1997 American Astronomical Society.
Department
Department of Earth Science
Original Publication Date
1-1-1997
DOI of published version
10.1086/118550
Recommended Citation
Morgan, Siobahn M. and Welch, Douglas L., "Beat Cepheid Period Ratios From Opal Opacities" (1997). Faculty Publications. 4063.
https://scholarworks.uni.edu/facpub/4063