The First Photometric Study of the Binary System CSS J003106.8+313347

• Published in: Astrophysics Vol. 66; no. 4; pp. 452 - 462
• Main Authors: Paki, E., Baudart, S., Poro, A.
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2023; Springer Nature B.V
• Subjects: Angular momentum; Astronomy; Astrophysics and Astroparticles; Astrophysics and Cosmology; Ground-based observation; Light curve; Markov chains; Observations and Techniques; Orbits; Parallax; Photometry; Physics; Physics and Astronomy; Space Exploration and Astronautics; Space Sciences (including Extraterrestrial Physics; photometric - stars; individual (CSS J003106.8+313347); eclipsing - stars; binaries; techniques
• ISSN: 0571-7256; 1573-8191
• DOI: 10.1007/s10511-024-09802-9

We performed the first photometric study of the CSS J003106.8+313347 W Ursae Majoris (WUMa)-type system based on ground-based observations. We extracted times of minima from our observations and proposed a linear ephemeris based on the increasing incline of the orbital period using a Markov chain Monte Carlo (MCMC) approach. The PHOEBE Python code and the MCMC approach were used for the light curve analysis. This system did not need starspots for the light curve analysis. Mass ratio, fillout factor, and inclination were obtained as 0.699, 0.322, and 60°.6 respectively. We also estimated the absolute parameters of the system using the Gaia DR3 parallax. Therefore, the masses, radii, and luminosities have been determined to be M 1 = 1.675, M 2 = 1.171, R 1 = 1.292, R 2 = 1.097, L 1 = 1.348, and L 2 = 1.221. The orbital angular momentum J 0 of the CSS J003106.8+313347 illustrates that this system is located in a region of contact binaries. The positions of the primary and secondary components on the Hertzsprung-Russell (HR) diagram are depicted.