Analysis of BVI Photometry of the Eclipsing BInary EV Lyrae

Details Analysis of BVI Photometry of the Eclipsing BInary EV Lyrae Analysis of BVI Photometry of the Eclipsing BInary EV Lyrae

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008javso..36...68h&link_type=abstract

The Journal of the American Association of Variable Star Observers, vol. 36, no. 1, p. 68

Computer Science

1

Scientific paper

Differential photometry of the previously little-observed semi-detached eclipsing binary EV Lyr from the 2006 observing season is presented and analyzed. This study utilized a 25-cm SCT instrument to observe portions of 116 orbital cycles and obtain B-, V-, and I-band photometry. This allowed the development of a complete phase diagram of the system and determination of the period of 0.91847 ±0.0002 day and HJD epoch 2453894.71997. Visual band photometric observations were fit to a binary star model phase diagram using the binary star modeling program nightfall. Derived properties for the primary were M/Msun = 1.6, R/Rsun = 1.64, spectral type F0 V, and effective temperature of 7300 K. Derived properties for the secondary were M/Msun = 0.79, R/Rsun = 0.78, spectral type K0 V, and effective temperature of 5200 K. Inclination for the system was found to be 88°.

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