Cepheids and Long Period Variables in M33
Abstract
We are conducting a long-term photometric survey of the nearby galaxy M33 to discover Cepheids, eclipsing binaries, and long-period variables. The dataset combines previously-obtained optical images from the DIRECT project with new observations acquired at the WIYN 3.5m telescope. The entire data set spans over 7 years with excellent synoptic coverage which will enable the discovery and characterization of stars displaying variability over a wide range of timescales (days, weeks, months, years). In this preliminary work we show representative light curves of different variables we found so far in two fields, color-magnitude diagrams, and optical Cepheid Period-Luminosity relations for M33. The ultimate goal of the project is to provide an absolute calibration of the Cepheid Period-Luminosity relation, and to study its metallicity dependence at optical wavelengths.
Keywords
Cite
@article{arxiv.0907.4995,
title = {Cepheids and Long Period Variables in M33},
author = {Anne Pellerin and Lucas M. Macri and Andrew K. Bradshaw and Krzysztof Z. Stanek},
journal= {arXiv preprint arXiv:0907.4995},
year = {2015}
}
Comments
3 pages, 6 figures. To appear in "Stellar Pulsation: Challenges for Theory and Observation", Eds. J. Guzik and P. Bradley