J/A+A/369/960 UBV minima for RU UMi (Manimanis+, 2001)
A Photometric study of the near-contact system RU Ursae Minoris
Manimanis V.N., Niarchos P.G.
<Astron. Astrophys. 369, 960 (2001)>
=2001A&A...369..960M 2001A&A...369..960M
ADC_Keywords: Binaries, eclipsing ; Photometry, UBV
Keywords: stars: binaries: eclipsing, starspots, stars: individual: RU UMi
Abstract:
The near-contact system RU UMi with an F0 primary and a K5 secondary
was observed in U, B and V wavelengths in May and July 1998, as well
as in March, May and July 1999. Six new observed times of minima are
given and a new ephemeris is proposed. The basic parameters of the
system extracted by our observations were used for spot modelling of
the light curves. A simple spot distribution was determined, based on
a model with one relatively small cool spot on the surface of the
secondary. Absolute elements were calculated and the evolutionary
status was determined. Our data favor a semi-detached configuration,
with the secondary filling its inner Roche lobe; the primary must also
be near the limits of its lobe.
Objects:
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RA (2000) DE Designation(s)
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13 38 58.0 +69 47 42 RU UMi
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 62 100 Normal points from UBV light curves
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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2- 8 F7.5 --- VPhase [0/1] Phase for the V normal point
11- 17 F7.5 --- VFlux V flux on a linear scale with max.flux=1.0
19- 20 I2 --- VWeight No. of observations used for the normal point
23- 29 F7.5 --- BPhase [0/1] Phase for the B normal point
32- 38 F7.5 --- BFlux B flux on a linear scale with max.flux=1.0
40- 41 I2 --- BWeight No. of observations used for the normal point
44- 50 F7.5 --- UPhase [0/1] Phase for the U normal point
53- 59 F7.5 --- UFlux U flux on a linear scale with max.flux=1.0
61- 62 I2 --- UWeight No. of observations used for the normal point
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Note: Only the observations of 1999 were used (all of them) for the
extraction of the normal points of the table.
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Acknowledgements: P. Niarchos
(End) Patricia Bauer [CDS] 06-Apr-2001