The Behlen observatory 0.76m telescope CCD photometer has been used to obtain 347 observations of the short period eclipsing binary V719 Her. The observations were done using the V and R bandpass filters on 6 nights in 1993. Previously published light elements and the present 6 determinations of eclipse timings of minimum are used to determine a new epoch and a more accurate orbital period of 0.4009827 days. There is no published spectral classification for V719 Her however, based on the color, V-R = 0.391 (Schmidt 1991, AJ, 102, 176), we estimate it to be F5. Photometric solutions have been obtained using the 1993 version of the Wilson-Devinney model. The adopted solution indicates that V719 Her is a W UMa type contact binary. The mass ratio, q = (mc/mh) = 0.29222, suggests that V719 Her is a W UMa system with type A configuration. Both components have similar temperatures however, their luminosity appear to be unequal. Contact systems with periods less than 0.5 and spectral class F5 are suspected to be zero-age contact stars. Since our photometric solution shows that the luminosity difference between the components is very large, we suspect that V719 Her is most likely a single line spectroscopic binary. However, spectroscopic study of this system is suggested, so that V719 Her can be better analyzed. This research was supported in part by NSF grant AST88-15806.
American Astronomical Society Meeting Abstracts
- Pub Date:
- December 1994