Nonradial Pulsations in Classical Cepheids of the Magellanic Clouds

2003/11/06 by Pawel Moskalik, Moskalik, Pawel, Zbigniew Kolaczkowski +3
Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph

paper · pdf · doi:10.48550/arxiv.astro-ph/0311157

4 pages, 2 figures, to appear in "Variable Stars in the Local Group", ASP Conference Series, eds. D. W. Kurtz & K. Pollard

arxiv created 2003/11/06 · arxiv updated 2009/12/01

Abstract

We have performed systematic frequency analysis of the LMC Cepheids observed by OGLE project. Several new types of pulsation behaviour are identified, including triple-mode and amplitude-modulated double-mode pulsations. In ~10% of the first overtone Cepheids we find low amplitude secondary periodicities corresponding to nonradial modes. This is the first evidence for excitation of nonradial oscillations in Classical Cepheid variables.

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