English

ZTF IC 10 variable catalog

Astrophysics of Galaxies 2025-04-15 v2 Solar and Stellar Astrophysics

Abstract

To study how massive variable stars effect their environment, we search for variability among Zwicky Transient Facility (ZTF) sources located within the optical extent of a nearby starburst galaxy IC 10. We present the ZTF IC 10 catalog, which classifies 1516 rr band sources and 864 gg band sources within a 225225'' radius around IC 10 into three categories: 1388 (767) rr (gg) band non-variables, 150 (85) rr (gg) band non-periodic variables, and 37 (12) rr (gg) band periodic variables. Among them 101 (48) rr (gg) band non-periodic variables, and 22 (4) rr (gg) band periodic variables are inside IC 10. We verify our classification by cross-matching with previous variability catalogs and machine learning powered classifications. Various analysis including population demographics, color-magnitude diagrams, and cross matching with a set of different surveys and database such as Gaia, XMM-Newton, Chandra, and SIMBAD are also presented. Based on source density and parallax, we distinguish sources within IC 10 from non-IC 10 sources. For IC 10 sources, we highlight flaring super giants, a source with long secondary period, periodic super giants including possible S Doradus luminous blue variable and candidate Miras. For non-IC 10 sources, we present super red sources and compact objects such as a possible long period subdwarf and a periodic X-ray source. The catalog can serve as a useful database to study the connection between various type of massive stars and their host galaxies.

Keywords

Cite

@article{arxiv.2504.08045,
  title  = {ZTF IC 10 variable catalog},
  author = {Zehao Jin and Joseph D. Gelfand},
  journal= {arXiv preprint arXiv:2504.08045},
  year   = {2025}
}

Comments

23 pages, 26 figures, 13 tables, accepted for publication in ApJS

R2 v1 2026-06-28T22:54:07.855Z