Approximating RR Lyrae light curves using cubic polynomials

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題名:	Approximating RR Lyrae light curves using cubic polynomials
作者:	Reyner,S;Kanbur,SM;Ngeow,C;Morgan,C
貢獻者:	天文研究所
關鍵詞:	LARGE-MAGELLANIC-CLOUD;SPECTRAL-ANALYSIS;SPACED DATA;STARS;CEPHEIDS;VARIABLES;MINIMUM;MAXIMUM;HALO
日期:	2010
上傳時間:	2012-03-27 18:08:11 (UTC+8)
出版者:	國立中央大學
摘要:	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.
關聯:	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
顯示於類別:	[天文研究所] 期刊論文

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