Periods and classifications of RR Lyrae stars in the globular cluster M15

被引：5

作者：

Hoffman, Andrew M. ^{[1
,2
]}

Murakami, Yukei S. ^{[1
,2
]}

Zheng, WeiKang ^{[1
]}

Stahl, Benjamin E. ^{[1
,2
]}

Filippenko, Alexei, V ^{[1
,3
]}

机构：

[1] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Miller Inst Basic Res Sci, Berkeley, CA 94720 USA

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2021年 / 502卷 / 01期

关键词：

methods: data analysis; techniques: photometric; stars: evolution; stars: variables: RR Lyrae; globular clusters: individual: M15; GRAVITATIONAL LENSING EXPERIMENT; PHOTOMETRIC STANDARD STARS; OGLE-III CATALOG; FOURIER DECOMPOSITION; FREQUENCY-ANALYSIS; VARIABLE-STARS; DATA RELEASE; OVERTONE; CEPHEID;

D O I：

10.1093/mnras/stab010

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present measurements of the periods, amplitudes, and types of 74 RR Lyrae stars in the globular cluster M15 derived from Nickel 1mtelescope observations conducted at Lick Observatory in 2019 and 2020. Of these RR Lyrae stars, two were previously reported but without a determination of the period. In addition, we identify five Type II Cepheid variable stars for which we report three novel period determinations, and a further 34 stars with uncertain classifications and periods. We discuss the development and subsequent application to our data of a new PYTHON package, Period-determination and Identification Pipeline Suite (PIPS), based on a new adaptive free-form fitting technique to detect the periods of variable stars with a clear treatment of uncertainties.

引用

页码：818 / 835

页数：18

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