A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris

Details A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris A Multicolour Photometric Study of the neglected eclipsing binary FT Ursae Majoris

2011-06-09

arxiv.org/abs/1106.1694v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 2 figures

Scientific paper

The multicolour photometric observations of the neglected eclipsing binary FT Ursae Majoris (FT UMa) were obtained in 2010. The 2003 version of Wilson-Devinney code was used to analyze the light curves in $B$, $V$, and $R$ bands simultaneously. Based on the spectroscopic mass ratio $q=0.984$ published by Pribulla et al., it is found that FT UMa is an evolved contact binary with a contact degree of 15.3%. The low amplitude of light variations, $\sim 0.15$ mag, arises mainly from a moderately low inclination angle of $i=62.^{\circ}80$ and almost identical components in size rather than the light dilution of a third component, which contributes light of only $\sim 10%$

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