The OGLE Collection of Variable Stars

Over 24 000 δ Scuti Stars in the Galactic Bulge and Disk from the OGLE Survey

I. Soszyński, P. Pietrukowicz, J. Skowron, A. Udalski, M. K. Szymański, D. M. Skowron, R. Poleski, S. Kozłowski, P. Mróz, K. Ulaczyk, K. Rybicki, P. Iwanek, M. Wrona, and M. Gromadzki
Acta Astronomica, 71, 189 (arXiv:2111.03072)

We present the largest collection of δ Scuti-type stars in the Milky Way. Together with the recently published OGLE collection of δ Sct variables in the inner Galactic bulge, our sample consists of 24 488 objects distributed along the Milky Way plane, over Galactic longitudes ranging from about -170° to +60°. The collection data include the I- and V-band time-series photometry collected since 1997 during the OGLE-II, OGLE-III, and OGLE-IV surveys.

On-sky distribution of delta Scuti stars in the Galactic bulge and disk

We show the on-sky distribution of δ Sct stars in the Galactic bulge and disk, discuss their period, luminosity and amplitude distributions, present Petersen diagram for multimode pulsators, distinguish 34 δ Sct stars in eclipsing and ellipsoidal binary systems, and list probable members of globular clusters.

Example I-band light curves of delta Scuti stars with additional eclipsing or ellipsoidal modulation

OGLE photometric data are available to the astronomical community from the OGLE Internet Archive and from the on-line OCVS search interface.

PLEASE cite the following paper when using the data or referring to these OGLE results:
Soszyński et al., 2021, Acta Astronomica, 71, 189 (arXiv:2111.03072)

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.