First study of five contact binary systems in the TESS field of view.

Somayeh Soomandar (Bishop's University )

In this paper, the photometric analysis of five short-period contact binary systems (MS Leo, My Leo, V0339 Leo, NZ Leo, and OP Leo) is presented. This is the first photometric analysis of these systems. These systems were observed during the TESS observations. The eclipse time of minima from TESS was calculated, and additional minima times from the literature were consulted for calculations. Five systems show a linear trend in orbital period changes. The light curve analysis was performed using the Physics of Eclipsing Binaries (PHOEBE).