Zwicky Transient Facility and Globular Clusters: The Period-Luminosity and Period-Wesenheit Relations for Anomalous Cepheids Supplemented with Large Magellanic Cloud Sample
Abstract
We present the first gri-band period-luminosity (PL) and period-Wesenheit (PW) relations for the fundamental mode anomalous Cepheids. These PL and PW relations were derived from a combined sample of five anomalous Cepheids in globular cluster M92 and the Large Magellanic Cloud, both of which have distance accurate to ~1% available from literature. Our g-band PL relation is similar to the B-band PL relation as reported in previous study. We applied our PL and PW relations to anomalous Cepheids discovered in dwarf galaxy Crater II, and found a larger but consistent distance modulus than the recent measurements based on RR Lyrae. Our calibrations of gri-band PL and PW relations, even though less precise due to small number of anomalous Cepheids, will be useful for distance measurements to dwarf galaxies.
- Publication:
-
The Astronomical Journal
- Pub Date:
- November 2022
- DOI:
- 10.3847/1538-3881/ac8df2
- arXiv:
- arXiv:2208.13950
- Bibcode:
- 2022AJ....164..191N
- Keywords:
-
- Globular star clusters;
- Anomalous Cepheid variable stars;
- Sky surveys;
- Distance indicators;
- 656;
- 2106;
- 1464;
- 394;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 8 pages, 1 Table and 4 Figures