A Photometric Study of the Contact Binary XZ Leonis

Details A Photometric Study of the Contact Binary XZ Leonis A Photometric Study of the Contact Binary XZ Leonis

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jkas...39...41l&link_type=abstract

Journal of the Korean Astronomical Society, vol. 39, no. 2, pp. 41-50

Astronomy and Astrophysics

Astronomy

1

Stars: Binaries: Close, Stars: Binaries: Eclipsing, Stars: Individual (Xz Leo), Stars: Spots

Scientific paper

We present the results of new multi-color CCD photometry for the contact binary XZ Leo, together with reasonable explanations for the period and light variations. Six new times of minimum light have been determined. A period study with all available timings confirms Qian's (2001) finding that the O-C residuals have varied secularly according to dP/dt = +8.20×10-8 d yr-1. This trend could be interpreted as a conservative mass transfer from the less massive cool secondary to the more massive hot primary in the system with a mass flow rate of about 5.37×10-8 M&sun; yr-1. By simultaneous analysis of our light curves and the previously published radial-velocity data, a consistent set of light and velocity parameters for XZ Leo is obtained. The small differences between the observed and theoretical light curves are modelled by a blue third light and by a hot spot near the neck of the primary component. Our period study does not support the tertiary light but the hot region which may be formed by gas streams from the cool secondary. The solution indicates that XZ Leo is a deep contact binary with the values of q=0.343, i=78.8°, Δ (T1-T2)=126 K, and f=33.6 %, differing much from those of Niarchos et al. (1994). Absolute parameters of XZ Leo are determined as follows: M1=1.84 M&sun;, M2=0.63 M&sun;, R1= 1.75 R&sun;, R2=1.10 R&sun;, L1=7.19 L&sun;, and L2=2.66 L&sun;.

Affiliated with

Also associated with

No associations

Rating

A Photometric Study of the Contact Binary XZ Leonis does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A Photometric Study of the Contact Binary XZ Leonis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Photometric Study of the Contact Binary XZ Leonis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1064082