AI 中文总结
该研究利用HST/ACS双波段时域测光对M101两个天区进行均匀变星普查，通过周期搜索和光变曲线建模等方法，产出含1417个候选体的星表，其中新发现420颗可靠造父变星，并公开数据以支持相关研究。
AI 中文摘要
我们基于均匀的多波段数据缩减和可复现的变星选择流程，对M101星系两个盘面天区进行了均匀的HST/ACS F555W/F814W时域测光普查，以研究邻近超新星宿主星系中的变星。补充的档案F555W观测数据仅用于优化所选长周期变星的解。候选体通过Lomb-Scargle周期搜索、傅里叶光变曲线建模、双波段一致性统计、人工星测试测光校正以及模式感知的造父变星精化方法进行筛选。最终星表包含1417个变星候选体，其中1102个为可靠的基本模式经典造父变星，78个为可靠的一阶泛音经典造父变星。在这些可靠的造父变星中，有420个是相对于Shappee & Stanek星表新发现的。该星表还包含位于经典造父变星序列之外的明亮候选体。我们公开发布该星表及源级双波段光变曲线，以支持造父变星物理、恒星变星及距离尺度应用的研究。
英文摘要
We present a homogeneous HST/ACS F555W/F814W time-series census of variable stars in two M101 disk fields, using a uniform multi-band reduction and reproducible variable-selection workflow for nearby SN-host galaxies. Supplementary archival F555W epochs are used only to refine selected long-period solutions. Candidates are selected with Lomb-Scargle period searches, Fourier light-curve modeling, two-band consistency statistics, artificial-star-test photometric corrections, and mode-aware Cepheid refinement. The final catalog contains 1417 variable-star candidates, including 1102 secure fundamental-mode and 78 secure first-overtone classical Cepheids. Of these secure Cepheids, 420 are newly identified relative to the Shappee & Stanek catalog. The catalog also contains luminous candidates outside the classical Cepheid locus. We release the catalog and source-level two-band light curves for studies of Cepheid physics, stellar variability, and distance-scale applications.
Comments16 pages, 6 figures, 4 tables; accepted for publication in ApJ
