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J/other/NewA/36.32 V441 Lac VRI light curves (Wang+, 2015)
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Beginning of ReadMe :J/other/NewA/36.32 V441 Lac VRI light curves (Wang+, 2015)
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Photometric study of the short-period eclipsing binary V441 Lac.
Wang D., Zhang L., Han X.L., Agerer F., Pi Q., Wang S.
<New Astron., 36, 32-36 (2015)>
=2015NewA...36...32W
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ADC_Keywords: Binaries, eclipsing ; Photometry, VRI
Keywords: stars: binaries: eclipsing - stars: individual V441 Lac -
stars: period variation
Abstract:
We present the first multi-color VRI CCD light curves of a
short-period eclipsing binary star v441 Lac in this paper. We obtained
our light curves on Oct. 4 and 8, 2013 at Xinglong station of National
Astronomical Observatories, China. We updated the ephemeris of V441
Lac based on three new minima derived by our new observational data
together with previously available light curve minima. By fitting the
O-C (observed minus calculated) values of the minima, we found that
the orbital period of V441 Lac exhibits an increasing trend of View
the dP/dt=5.67(0.35)x10^-7^days/year, which might be explained by mass
transfer from the secondary component to the primary one, or angular
momentum exchange by magnetic activities. We also obtained the
photometric orbital parameters with the Wilson & Devinney program. Our
final result shows that the V441 Lac system is a semi-detached binary
with the secondary component filling roche lobe.
Description:
We carried out our new photometric observations of V441 Lac on Oct. 4
and 8 2013 using the 85-cm reflecting telescope at Xinglong station of
the National Astronomical Observatories of China (NAOC).
Objects:
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RA (2000) DE Designation(s)
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22 09 37.53 +52 34 16.0 V441 Lac = V* V441 Lac
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