Approximating RR Lyrae light curves using cubic polynomials

Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/50699

Title:	Approximating RR Lyrae light curves using cubic polynomials
Authors:	Reyner,S;Kanbur,SM;Ngeow,C;Morgan,C
Contributors:	天文研究所
Keywords:	LARGE-MAGELLANIC-CLOUD;SPECTRAL-ANALYSIS;SPACED DATA;STARS;CEPHEIDS;VARIABLES;MINIMUM;MAXIMUM;HALO
Date:	2010
Issue Date:	2012-03-27 18:08:11 (UTC+8)
Publisher:	國立中央大學
Abstract:	In this paper, we use cubic polynomials to approximate RR Lyrae light curves and apply the method to Hubble Space Telescope data of RR Lyrae stars in the halo of M31. We compare our results to the standard method of Fourier decomposition and find that the method of cubic polynomials eliminates virtually all ringing effects and does so with significantly fewer parameters than the Fourier technique. Further, for RRc stars the parameters in the fit are all physical in the sense that they can, in principle, be related to pulsation physics. Our study also reveals a number of additional periodicities in this data not found previously: we find 23 RRc stars, 29 RRab stars and three multiperiodic stars.
Relation:	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Appears in Collections:	[Graduate Institute of Astronomy] journal & Dissertation

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