J/A+A/540/A64 uvby light curves of EF Aqr (Vos+, 2012)
Absolute dimensions of solar-type eclipsing binaries.
EF Aquarii: a G0 test for stellar evolution models.
Vos J., Clausen J.V., Jorgensen U.G., Oestensen R.H., Claret A., Hillen M.,
Exter K.
<Astron. Astrophys. 540, A64 (2012)>
=2012A&A...540A..64V 2012A&A...540A..64V
ADC_Keywords: Binaries, eclipsing ; Photometry, uvby
Keywords: stars: evolution - stars: fundamental parameters - stars: abundances -
stars: activity - binaries: eclipsing
Abstract:
Recent studies have shown that stellar chromospheric activity, and its
effect on convective energy transport in the envelope, is most likely
the cause of significant radius and temperature discrepancies between
theoretical evolution models and observations. Accurate mass, radius,
and abundance determinations from solar-type binaries exhibiting
various levels of activity are needed for a better insight into the
structure and evolution of these stars.
We aim to determine absolute dimensions and abundances for the
solar-type detached eclipsing binary EF Aqr, and to perform a detailed
comparison with results from recent stellar evolutionary models.
Description:
Stromgren ubvy photometry of EF Aqr obtained with the Stromgren
Automatic Telescope (SAT) at ESO La Silla between 2002 and 2008.
Objects:
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RA (2000) DE Designation(s)
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23 01 19.1 -06 26 15 EF Aqr = V* EF Aqr
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
phot.dat 41 764 Stromgren photometry
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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 JD Julian Date
16- 20 F5.3 mag ymag Stromgren y magnitude
23- 27 F5.3 mag bmag Stromgren b magnitude
30- 34 F5.3 mag vmag Stromgren v magnitude
37- 41 F5.3 mag umag Stromgren u magnitude
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Acknowledgements:
Joris Vos, jorisv(at)ster.kuleuven.be
(End) Joris Vos [KULeuven, Belgium], Patricia Vannier [CDS] 21-Feb-2012