J/A+A/542/A78 BVRI light curves and RV curves of 65 UMa (Zasche+, 2012)
Unique sextuple system: 65 UMa.
Zasche P., Uhlar R., Slechta M., Wolf M., Harmanec P., Nemravova J.A.,
Korcakova D.
<Astron. Astrophys. 542, A78 (2012)>
=2012A&A...542A..78Z 2012A&A...542A..78Z
ADC_Keywords: Stars, double and multiple ; Binaries, eclipsing ;
Radial velocities ; Photometry, UBVRI
Keywords: binaries: eclipsing - stars: fundamental parameters -
stars: individual: 65 UMa - stars: early-type
Abstract:
The study of stellar multiple systems provides us with important
information about the stellar formation processes and can help us to
estimate the multiplicity fraction in the Galaxy. 65 UMa belongs to a
rather small group of stellar systems of higher multiplicity, whose
inner and outer orbits are well-known. This allows us to study the
long-term stability and evolution of the orbits in these systems.
We obtained new photometric and spectroscopic data that when combined
with interferometric data enables us to analyze the system 65 UMa and
determine its basic physical properties.
Description:
We perform a combined analysis of the light and radial velocity
curves, as well as the period variation by studying the times of the
minima and the interferometric orbit. A disentangling technique is
used to perform the spectra decomposition. This combined approach
allows us to study the long-term period changes in the system for the
first time, identifying the period variation due to the motion on the
visual orbit, in addition to some short-term modulation.
Objects:
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RA (2000) DE Designation(s)
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11 55 05.75 +46 28 36.6 65 UMa = HD 103483
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
astrom.dat 138 33 The astrometry of 65 UMa used for the analysis
minima.dat 81 43 Heliocentric minima times of 65 UMa used for
the analysis
phot.dat 29 8709 BVRI photometry of 65 UMa
rv.dat 56 54 Radial velocities of 65 UMa
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Byte-by-byte Description of file: astrom.dat
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Bytes Format Units Label Explanations
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1- 9 F9.4 yr Date Date of observation
11- 15 F5.3 arcsec rho Angular separation of the components
17- 21 F5.1 deg phi Position angle between the components
23-138 A116 --- Ref Reference/Observer
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Byte-by-byte Description of file: minima.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian Date of Minimum
16- 22 F7.5 d e_HJD ? Error of HJD
24- 27 A4 --- P/S [Prim Sec] Type of Minimum (primary/secondary)
29- 32 A4 --- Filter Filter(s) Used
34- 81 A48 --- Ref Reference/Observer
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Byte-by-byte Description of file: phot.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD Heliocentric Julian Date of Observation
15 A1 --- Band [BVRI] Observed band
17- 22 F6.4 mag mag Magnitude in Band Filter
24- 29 F6.4 mag e_mag Error of magnitude
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date of Observation
15- 21 F7.2 km/s RV1o Original velocity of the primary component
24- 30 F7.2 km/s RV2o Original velocity of the secondary component
33- 38 F6.2 km/s RV3 Velocity of the third component
41- 47 F7.2 km/s RV1c Corrected velocity of the primary component
(640-day orbit subtracted)
50- 56 F7.2 km/s RV2c Corrected velocity of the secondary component
(640-day orbit subtracted)
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Acknowledgements:
Petr Zasche, zasche(at)sirrah.troja.mff.cuni.cz
(End) Patricia Vannier [CDS] 03-Apr-2012