J/A+A/469/285 Differential Stroemgren photometry of U Oph (Vaz+, 2007)
Absolute dimensions of eclipsing binaries.
XXV. U Ophiuchi and the evolution and composition of 5 M☉ stars.
Vaz L.P.R., Andersen J., Claret A.
<Astron. Astrophys. 469, 285 (2007)>
=2007A&A...469..285V 2007A&A...469..285V
ADC_Keywords: Binaries, eclipsing ; Photometry, uvby
Keywords: stars: binaries: eclipsing - stars: fundamental parameters -
stars: evolution - Galaxy: evolution
Abstract:
We aim to determine absolute dimensions for the mid B-type
eclipsing binary U Ophiuchi and compare the inferred ages and
chemical compositions to those of other binary stars with masses
near 5M☉.
We determine masses, radii, logg, logTeff, and luminosities for
the stars in U Oph from new radial velocities and uvby light curves.
By improving the Wilson-Devinney code, we also derive precise
apsidal-motion and light-time orbits of this triple system, using 353
times of minimum over 120 years. Finally, we compare the data for
U Oph and similar systems with the predictions of stellar models.
Description:
Table 5 presents 645 uvby magnitude differences U Oph - HR 6367 in
the instrumental system of the 0.5m Stroemgren Automatic Telescope
(SAT) at ESO, La Silla, Chile, obtained from 1992 to 1994.
Objects:
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RA (2000) DE Designation(s)
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17 16 31.7 +01 12 38 U Oph = HD 156247
17 08 13.7 -01 04 46 HR 6367 = HD 154895
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 62 645 645 magnitude differences U Oph - HR 6367
obtained from 1992 to 1994 (instrumental system)
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See also:
J/A+A/461/1077 : Radial velocities of DW Car (Southworth+, 2007)
J/A+A/487/1095 : Radial velocities of QD Boo, VZ Hya, WZ Oph (Clausen+, 2008)
Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD Julian date
15- 20 F6.3 mag ymag Stroemgren y magnitude
22- 27 F6.3 mag b-y Stroemgren b-y colour index
29- 34 F6.3 mag m1 Stroemgren m1 colour index
36- 41 F6.3 mag c1 Stroemgren c1 colour index
43- 48 F6.3 mag bmag Stroemgren b magnitude
50- 55 F6.3 mag vmag Stroemgren v magnitude
57- 62 F6.3 mag umag Stroemgren u magnitude
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Acknowledgements:
Luiz Paulo Ribeiro Vaz, lpv(at)fisica.ufmg.br
References:
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Clausen et al., Paper XXVI 2008A&A...487.1095C 2008A&A...487.1095C, Cat. J/A+A/487/1095
(End) Luiz Paulo Ribeiro Vaz [DF-ICEx-UFMG], Patricia Vannier [CDS] 23-Apr-2007