Complete Photometric Analysis on U,B,V Light Curves of the Near-Contact Eclipsing Binary: HL Aurigae
HL Auriga (S4727 Aur) has been observed as part of our ongoing survey of the eccentric eclipsing binary (EEB) candidates of Heged's. Complete U,B,V photometric light curves of HL Aur were obtained from December 9-15, 1994 at Lowell Observatory, Flagstaff, Arizona. The 0.79-m National Undergraduate Research Observatory (NURO) reflector was used in conjunction with a thermoelectrically cooled S-13 type PMT. Three new primary and one secondary precision epochs of minimum light were determined as follows (2449000+): 695.8909(3), 696.8232(1), 698.6900(7), 701.8021(5). A period study spanning 45 years was conducted utilizing more than 150 times of minima collected from the literature. The photometry has been standardized and corrected for interstellar reddening. Combining our photometry and our best synthetic light curve solution, we find that HL Auriga is in a semi-detached configuration with the primary component having a fillout of 91%. The primary and secondary components have spectral types of F4 V and G5 V respectively and show a difference in temperature of ~ 1200 K. The secondary minima does occur at 0.5 phase giving strong evidence that the orbit is circular and HL Aur is not an EEB.
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1995