J/PASP/124/411 YY Cet UBV differential light curves (Williamon+, 2012)
Orbital solutions and absolute elements of the eclipsing binary YY Ceti.
Williamon R.M., Sowell J.R.
<Publ. Astron. Soc. Pac., 124, 411-417 (2012)>
=2012PASP..124..411W 2012PASP..124..411W
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Keywords: Stars
Abstract:
YY Cet is a 10.5 mag semidetached variable with a 19 hr orbital
period. The Wilson-Devinney program is used to simultaneously solve
two new sets of UBV light curves together with preexisting photometry
and single-line radial velocity measurements . The system has the
lower-mass component completely filling its Roche lobe. The resulting
masses are M1=1.78±0.19M☉ and M2=0.92±0.10M☉, and the
radii are R1=2.08±0.08R☉ and R2=1.62±0.06R☉. Its
computed distance is 534±28pc. Light- and velocity-curve
parameters, orbital elements, and absolute dimensions are presented. A
study of published TOM observations indicates that the period changed
around 1999.
Description:
Our photometric observations of YY Cet (BD-18 349, SAO 148148) were
obtained with the 90cm Cassegrain reflector at the Fernbank Science
Center (Atlanta, Georgia) during 1973-1977. More than 540 measurements
were made in each UBV bandpass with an unrefrigerated EMI 6256s
photomultiplier. A second set of unpublished UBV data were given to us
by Carlson Chamblis when he retired. His 152 measurements in each
bandpass were obtained in 1972-1973 with the 0.6m telescope at Mount
John University Observatory in New Zealand.
The improved ephemeris for the primary eclipse of YY Cet is
minimum light (HJD)=2442658.94694±0.00006+0.790458487±0.000000052E
Objects:
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RA (2000) DE Designation(s)
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02 00 12.04 -18 12 28.2 YY Cet = BD-18 349
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 56 544 Photometric observations from
Fernbank Observatory
table2.dat 55 152 Photometric Observations from the
Mt. John University Observatory
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Byte-by-byte Description of file: table1.dat table2.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d HJD-V Heliocentric Julian date (HJD-2400000)
13- 18 F6.4 mag dVmag Differential V magnitude
20- 30 F11.5 d HJD-B Heliocentric Julian date (HJD-2400000)
32- 37 F6.4 mag dBmag Differential B magnitude
39- 49 F11.5 d HJD-U Heliocentric Julian date (HJD-2400000)
51- 56 F6.4 mag dUmag Differential U magnitude
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 22-Mar-2013