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J/other/NewA/38.50 VIr light curves of GK Aqr (Zhang+, 2015)
The following files can be converted to FITS (extension .fit or fit.gz)
table2.dat table3.dat refs.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/other/NewA/38.50
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-r--r--r-- 1 cats archive 5416 Sep 17 2015 ReadMe
-r--r--r-- 1 cats archive 547 Jul 6 2015 refs.dat [txt] [txt.gz] [fits] [fits.gz] [html]
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Beginning of ReadMe :J/other/NewA/38.50 VIr light curves of GK Aqr (Zhang+, 2015)
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The first multi-color photometric study of the short-period contact eclipsing
binary GK Aqr.
Zhang L., Pi Q., Han X.L., Li T., Zhang X., Sang H., Wang D., Wang S.
<New Astron., 38, 50-54 (2015)>
=2015NewA...38...50Z
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ADC_Keywords: Binaries, eclipsing ; Photometry, VRI
Keywords: stars: binaries: eclipsing - stars: period variation -
stars: individual GK Aqr
Abstract:
We made the first VRI CCD light curves of the short-period contact
eclipsing binary GK Aqr, which was observed on October 5 and 8, 2013
at Xinglong station of National Astronomical Observatories, China. The
ephemeris of GK Aqr was calculated based on our two newly obtained
minima and the minima that other observers obtained previously. We
discovered that the orbital period of GK Aqr exhibits an increasing
trend of dP/dt=2.8(0.1)x10^-7^days/year by means of fitting the O-C
values of the minima. This phenomenon might be explained by mass
transfer from the primary (less massive) component to the secondary
(more massive) one. With the updated Wilson & Devinney
(1971ApJ...166..605W) program, we obtained the photometric orbital
parameters for the first time. Using our parameters, we also
successfully explained the light curve obtained from the All Sky
Automated Survey data. In the end, we concluded that GK Aqr is a near
contact binary with a low contact factor of 5.2%. As the mass transfer
continues, GK Aqr could become a contact system and evolve into an
over-contact system.
Description:
We made our observations of GK Aqr on October 5 and 8 in 2013 with the
85-cm 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 19 56.95 -00 39 46.7 GK Aqr = V* GK Aqr
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