J/A+A/590/A45 GU Mon BV light curves (Lorenzo+, 2016)
GU Monocerotis: A high-mass eclipsing overcontact binary in the young open
cluster Dolidze 25.
Lorenzo J., Negueruela I., Vilardell F., Simon-Diaz S., Pastor P.,
Mendez Majuelos M.
<Astron. Astrophys. 590, A45 (2016)>
=2016A&A...590A..45L 2016A&A...590A..45L (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Stars, early-type ; Photometry, UBV
Keywords: stars: distances - binaries: spectroscopic -
stars: fundamental parameters - binaries: eclipsing - binaries: close
Abstract:
We present a comprehensive analysis, including B and V light curves
and 11 high-resolution spectra, to verify the orbital period and
determine parameters. The spectroscopic and photometric analyses agree
on a period of 0.896640±0.000007d. We determine a mass of
9.0±0.6M☉ for each component and temperatures of
28000±2000K. Both values are consistent with the spectral type B1V.
The two stars are overfilling their respective Roche lobes, sharing a
common envelope, and therefore the orbit is synchronised and
circularised. Thetwo stars are in a very advanced stage of
interaction, with their extreme physical similarity likely due to the
common envelope. The expected evolution of such a system will very
probably lead to a merger while still on the main sequence.
Description:
Photometric data in B and V filter for the eclipsing binary system GU
Monocerotis.
Objects:
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RA (2000) DE Designation(s)
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06 44 46.86 +00 13 18.3 GU Mon = V* GU Mon
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
bmag.dat 21 780 GU Mon photometric data in B band
vmag.dat 21 1138 GU Mon photometric data in V band
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Byte-by-byte Description of file: bmag.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD [2457005/2457088] Heliocentric Julian date
16- 21 F6.3 --- Bmag B magnitude
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Byte-by-byte Description of file: vmag.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d HJD [2454874/2454884] Heliocentric Julian date
16- 21 F6.3 --- Vmag V magnitude
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Acknowledgements:
Javier Lorenzo, fjle3(at)alu.ua.es
(End) Javier Lorenzo [U.A, Spain], Patricia Vannier [CDS] 16-Mar-2016