A hundred new eclipsing binary system candidates detected in a near-infrared window in the VVV survey

L.V. GRAMAJO, T. PALMA, D. MINNITI, R.K. SAITO, J.J. CLARIÁ, R. KAMMERS, F. SUROT

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF AUSTRALIA

CSIRO PUBLISHING

Lugar: Collingwood; Año: 2020 vol. 37 p. 54 - 54

1323-3580

e present the first results obtained from an extensive study of eclipsing binary (EB) system candidates recently detected in the VISTA Variables in the Vía Láctea (VVV) near-infrated (NIR) Survey. We analyze the VVV tile d040 in the southern part of the Galactic disc wherein the interstellar reddening is comparatively low, which makes it possible to detect hundreds of new eclipsing binary candidates. We present here the light curves and the determination of the geometric and physical parameters of the best candidates found in this "NIR window", including 37 contact, 50 detached and 13semi-detached eclipsing binary systems. We infer that the studied systems have an average of the Ks amplitudes of 0.8 mag and a median period of 1.22 days where, in general, contact binaries have shorter periods. Using the "Physics Of Eclipsing Binaries" (PHOEBE) interactive interface, which is based on the Wilson and Devinney code, we find that the studied systems have low eccentricities. The studied EBs