9. A Multi-Band Photometric Study of the Spotted Short-Period Variable Star NSVS 2827877

Alexander Thomas Ball State University, Elijah Halliwell Ball State University
Faculty Sponsor(s): Robert Berrington Ball State University
We present a photometric analysis of the eclipsing binary star NSVS 2827877. Images of this system were taken in May and June of 2018 with the Ball State University Observatory 20-inch (0.5 m) telescope in three different filters. These filters include the Bessel prescription of the Johnson B and V filters, and the Cousins R filter. The images were analyzed using the program AstroImageJ to find the differential ensemble magnitude of the system. The magnitude of the system was then analyzed using a program called PHysics Of Eclipsing BinariEs (PHOEBE). PHOEBE is a program that generates a synthetic light curve from a physical model of the stellar system. The stellar system parameters are determined from the best-fit model to the observed data. Our analysis shows that NSVS 2827877 is consistent with an over-contact eclipsing binary star in thermal contact with surface temperatures T = 5599 ± 231 K The orbital period of the system was found to be 0.3293 ± 0.0006 days, and the mass ratio between the stars was about 1.09. A period analysis was performed by comparing the Observed minus Calculated (O-C) times of minimum. Our analysis confirms the period of 0.3293 ± 0.0006 days.
Physics & Astronomy
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Irwin Library Lower Level