Optical And X-ray Variability Of {\gamma} Cas Stars: Sao 49725

TL;DR

This study investigates optical and X-ray variability in the gamma Cas star SAO 49725, revealing short-term spectral changes and a rotation period, with photometric variability patterns that vary over time.

Contribution

It provides new insights into the variability patterns of SAO 49725 through combined optical, X-ray, and TESS photometric analysis, highlighting short-term spectral variability and rotation period detection.

Findings

Short-term spectral line profile variability (70-223 min)

Detection of a 1.1989-day rotation period from TESS data

Variability patterns change significantly across different epochs

Abstract

The present paper is devoted to studying the variability of the $\gamma$ Cas type star SAO 49725. Both the optical and X-ray spectra of the star are analyzed. Variability of line profiles in the spectra of SAO 49725 was discovered on short (70-223 minutes) scales. Based on the TESS photometric light curves of SAO 49725 the regular variations of light curves are detected with a period of 1.1989 days identified as the rotation period of the star. The pattern of photometric variability in SAO 49725, as observed by TESS, varies significantly across different epochs. The TESS components of the SAO 49725 light curves with periods of $\sim3-21\,$days may be instrumental.