The OGLE Collection of Variable Stars. Over 2600 Delta Scuti Stars in the Small Magellanic Cloud

TL;DR

This paper presents the first comprehensive catalog of over 2600 delta Scuti variable stars in the Small Magellanic Cloud, including detailed observational data and classifications from the OGLE-IV survey.

Contribution

It provides the first extensive collection and characterization of delta Scuti stars in the SMC, including observational parameters and long-term photometry.

Findings

Over 2600 delta Scuti stars identified in the SMC

Sample includes single- and multimode pulsators

Provides detailed pulsation and photometric data

Abstract

We present the first-ever collection of delta Scuti stars found over the entire area of the Small Magellanic Cloud (SMC). The sample consists of 2810 variables of which over 2600 objects belong to the SMC while the remaining stars are most likely members of the Milky Way's halo. The sample has been divided into 2733 singlemode and 77 multimode pulsators. We provide observational parameters (pulsation periods, mean magnitudes, amplitudes, Fourier coefficients) of all delta Sct stars and the long-term I- and V-band time-series photometric measurements collected during the fourth phase of the Optical Gravitational Lensing Experiment (OGLE-IV).