Faculty Publications

Title

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.

Original Publication Date

1-1-1997

DOI of published version

10.1086/118550

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