文章基本信息

标题：Cepheids in M31: The PAndromeda Cepheid Sample
本地全文：下载
作者：Mihael Kodric ; Arno Riffeser ; Ulrich Hopp 等
期刊名称：The Astronomical journal
印刷版ISSN：0004-6256
电子版ISSN：1538-3881
出版年度：2018
卷号：156
期号：3
页码：1-30
DOI：10.3847/1538-3881/aad40f
语种：English
出版社：American Institute of Physics
摘要：We present the largest Cepheid sample in M31 based on the complete Pan-STARRS1 survey of Andromeda(PAndromeda) in the r P1 , i P1 , and g P1 bands. We find 2686 Cepheids with 1662 fundamental-mode Cepheids, 307first-overtone Cepheids, 278 type II Cepheids, and 439 Cepheids with undetermined Cepheid type. Using themethod developed by Kodric et al., we identify Cepheids by using a three-dimensional parameter space of Fourierparameters of the Cepheid light curves combined with a color cut and other selection criteria. This is an unbiasedapproach to identify Cepheids and results in a homogeneous Cepheid sample. The period–luminosity relationsobtained for our sample have smaller dispersions than in our previous work. We find a broken slope that wepreviously observed with HST data in Kodric et al., albeit with a lower significance.
关键词：catalogs;distance scale;galaxies: individual (M31);Local Group;stars: variables: Cepheids