A Double‐Mode RR Lyrae Star with a Strong Fundamental‐Mode Component | Zendy

Lindsay Oaster | Zendy; H. A. Smith | Zendy; Karen Kinemuchi | Zendy

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A Double‐Mode RR Lyrae Star with a Strong Fundamental‐Mode Component

Author(s) -

Lindsay Oaster,

H. A. Smith,

Karen Kinemuchi

Publication year - 2006

Publication title -

publications of the astronomical society of the pacific

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.294

H-Index - 172

eISSN - 1538-3873

pISSN - 0004-6280

DOI - 10.1086/499927

Subject(s) - rr lyrae variable , physics , overtone , astrophysics , mode (computer interface) , stars , photometry (optics) , light curve , sky , double star , amplitude , variable star , astronomy , globular cluster , optics , spectral line , computer science , operating system

NSVS 5222076, a thirteenth magnitude star in the Northern Sky VariabilitySurvey, was identified by Oaster as a possible new double-mode RR Lyrae star.We confirm the double-mode nature of NSVS 5222076, supplementing the surveydata with new V band photometry. NSVS 5222076 has a fundamental mode period of0.4940 day and a first overtone period of 0.3668 day. Its fundamental modelight curve has an amplitude twice as large as that of the first overtone mode,a ratio very rarely seen. Data from the literature are used to discuss thelocation in the Petersen diagram of double-mode RR Lyrae stars having strongfundamental mode pulsation. Such stars tend to occur toward the short periodend of the Petersen diagram, and NSVS 5222976 is no exception to this rule.Comment: 14 pages, 4 figures, To be published in the March, 2006, issue of PAS

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