We present the results of a search for Miras and long-period variables (LPVs) in M33 using griJHKs archival observations from the Canada-France-Hawai'i Telescope. We use multiband information and machine learning techniques to identify and characterize these variables. We recover ~1,300 previously-discovered Mira candidates and identify ~13,000 new Miras and LPVs. We detect for the first time a clear first-overtone pulsation sequence among Mira candidates in this galaxy. We use O-rich, fundamental-mode Miras in the LMC and M33 to derive a distance modulus for the latter of 24.629 +/- 0.046 mag.
@article{arxiv.2405.00503,
title = {The M33 Synoptic Stellar Survey. III. Miras and LPVs in griJHKs},
author = {Tarini Konchady and Lucas Macri and Xiaomeng Yan and Jianhua Huang},
journal= {arXiv preprint arXiv:2405.00503},
year = {2024}
}
Comments
Published in MNRAS; data available at http://github.com/lmacri/m33sss_miras