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J/other/NewA/48.58 V1044 Her VR differential photometry (Lu+, 2016)
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table2.dat
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Beginning of ReadMe :J/other/NewA/48.58 V1044 Her VR differential photometry (Lu+, 2016)
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The multi-band CCD photometric investigation of short-period eclipsing
binary V1044 Her.
Lu H., Zhang L., Han X.L., Pi Q., Wang D.
<New Astron., 48, 58-65 (2016)>
=2016NewA...48...58L (SIMBAD/NED BibCode)
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ADC_Keywords: Binaries, eclipsing ; Photometry, VRI ; Photometry, CCD
Keywords: stars: binaries eclipsing - stars: individual: V1044 Her -
stars: period variation
Abstract:
We present new CCD photometric observations of V1044 Her obtained on
May 22, 23 and 24, 2015. From our data, we derived five new light
curve minimum times. Combining our new results with previously
available CCD light minimum times, we derived an updated ephemeris and
discovered that the period of this binary system exhibits an
oscillation. The cyclic variation may be caused by the light-time
effect via the presence of a third body or magnetic activity cycle. We
calculated the corresponding period of the third body to be
14.1+/-1.4 years or magnetic cycle to be 12.2+/-0.7 years. We analyzed
our new asymmetric light curves to obtain photometric solutions and
starspot parameters using the Wilson and Devinney program. The final
results show that V1044 Her is a contact binary system with a degree
of contact factor f=3.220(+/-0.002)%.
Description:
V1044 Her was observed in the VR bands on May 22, 23 and 24, 2015
using the 60-cm reflecting telescope at Xinglong Station of the
National Astronomical Observatories of China (NAOC). This telescope
was equipped with a 1024x1024 pixel CCD and the standard Johnson
UBVRI filters.
Objects:
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RA (2000) DE Designation(s)
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17 10 17.90 +38 26 41.5 V1044 Her = V* V1044 Her
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