# Siam Physics Congress 2015

May 20 – 22, 2015
Asia/Bangkok timezone
The Centennial Celebration of General Relativity Theory and 80 Years of Thai Physics Graduate

## A Study of the Orbital Period of a Binary System V2790 Ori

May 20, 2015, 2:00 PM
3h 30m
Board: AST-06
Poster presentation Astronomy, Astrophysics, and Cosmology

### Speaker

Mr Sarawut Choolok (Department of Physics and General Science, Faculty of Science and Technology, Songkhla Rajabhat University, Songkhla 90000, Thailand)

### Description

V2790 Ori is a W Uma Eclipsing Binary with an orbital period of 0.28784200 day. From the previous investigation of its light curve, it was found that this binary system has a continuous orbital period change. In this research, new photometric B V and R light curves have been obtained to compute time of minimum light. Using the previously published time of minima and the value obtained in this research, an O - C curve of V2790 Ori was constructed. It was found that, this curve trends toward a downward parabolic variation. The result reveals that the orbital period of V2790 Ori there was a decrease in the rate $9.81954433 \times 10^{-6}$ seconds per year to $4.263948685 \times 10^{-6}$ seconds per year.

### Primary author

Mr Sarawut Choolok (Department of Physics and General Science, Faculty of Science and Technology, Songkhla Rajabhat University, Songkhla 90000, Thailand)

### Co-authors

Mr Jirapon Dalaeman (Department of Physics and General Science, Faculty of Science and Technology, Songkhla Rajabhat University, Songkhla 90000, Thailand) Mr Thongthai Choolakha (Department of Physics and General Science, Faculty of Science and Technology, Songkhla Rajabhat University, Songkhla 90000, Thailand)

### Presentation materials

There are no materials yet.