The OGLE Collection of Variable Stars

Additional Galactic Cepheids from the OGLE Survey

I. Soszyński, A. Udalski, M. K. Szymański, P. Pietrukowicz, J. Skowron, D. Skowron, R. Poleski, S. Kozłowski, P. Mróz, K. Ulaczyk, K. Rybicki, P. Iwanek, M. Wrona, and M. Gromadzki
2020, Acta Astronomica, 70, 101 (arXiv:2007.07255)

Data download: BLG/CEP, GD/CEP, BLG/T2CEP, GD/T2CEP, GAL/ACEP

We report on the results of a comprehensive search for Cepheid variable stars in the fields photometrically monitored by the OGLE Galaxy Variability Survey. We identify 742 Cepheids not included in the first release of the OGLE Collection of Galactic Cepheids and reclassify several dozen previously published variables. The upgraded collection comprises 1974 classical, 1625 type II, and 119 anomalous Cepheids located in the area of about 3000 square degrees covering the disk and bulge of the Milky Way.

On-sky distribution of classical, type II, and anomalous Cepheids in the Galactic bulge and disk

We present the most interesting objects in our sample: an isolated group of long-period double-mode classical Cepheids pulsating in the fundamental mode and first overtone, the first known Galactic double-mode Cepheid with the second and third overtone excited, double-mode type II Cepheids, candidates for single-mode first-overtone BL Her stars, and Cepheids showing simultaneous eclipsing variability. We also discuss type II and anomalous Cepheids that are potential members of globular clusters.

Light curves of selected multi-periodic Cepheids

OGLE photometric data are available to the astronomical community from the OGLE Internet Archive and through the on-line search form in the OGLE Collection of Variable Stars.

PLEASE cite the following paper when using the data or referring to these OGLE results:
Soszyński et al., 2020, Acta Astronomica, 70, 101 (arXiv:2007.07255)

Any comments about the data and the form of their presentation are welcome as they can improve the future releases of OGLE analysis. Send your messages to this address.

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