Modern Comprehensive study of the W UMa System TY Boo

TL;DR

This study presents new multi-color light curves and a detailed analysis of the W UMa system TY Boo, revealing temperature differences, period variations, and evolutionary insights through photometric and period analysis.

Contribution

It provides new CCD light curves, a refined photometric solution, and analysis of period changes, offering updated parameters and evolutionary status of TY Boo.

Findings

The low-mass component is hotter than the more massive one.

The system exhibits a periodic-like variation in its orbital period.

The period is decreasing at a rate of approximately 6.74 x 10^(-9) days per year.

Abstract

New CCD three colors light curves of TY Boo were carried out in five nights from February to May 2006 in BVR bandpass using a 50-cm F/8.4 Ritchey Chretien telescope (Ba50) of the Baja Astronomical Observatory (Hungary), and 512*512 Apogee AP-7 CCD camera. A photometric solution of these light curves was obtained by means of Willson-Devinney code. The results showed that the low massive component is hotter than the more massive and cool one, and the temperature difference between the components is Delta T = 249 K. Long term investigation for the period behavior of the system based on all available data shows two stages of increase and similar of decrease, which look like as a periodic behavior. A new light elements yields a new period (p= 0.3171506 day) and shows a period decrease with the rate dP/dE = 5.858*10^(-12) day/cycle or 6.742*10^(-9) day/year or 0.1 second/century. The evolutionary status of the system is discussed.