J/A+A/591/A129 V346 Cen multiwavelength light curves (Mayer+, 2016)
V346 Centauri: Early-type eclipsing binary with apsidal motion and abrupt
change of orbital period.
Mayer P., Harmanec P., Wolf M., Nemravova J., Prsa A., Fremat Y.,
Zejda M., Liska J., Jurysek J., Honkova K., Masek M.
<Astron. Astrophys. 591, A129 (2016)>
=2016A&A...591A.129M 2016A&A...591A.129M (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry
Keywords: stars: early-type - binaries: close - stars: individual: V346 Cen
Abstract:
New physical elements of the early B-type eclipsing binary V346 Cen
are derived using the HARPS spectra downloaded from the ESO archive
and also numerous photometric observations from various sources. A
model of the observed times of primary and secondary minima that fits
them best is a combination of the apsidal motion and an abrupt
decrease in the orbital period from 6.322123d to 6.321843d (shortening
by 24s), which occurred somewhere around JD 2439000. Assumption of a
secularly decreasing orbital period provides a significantly worse
fit. Local times of minima and the final solution of the light curve
were obtained with the program PHOEBE. Radial velocities of both
binary components, free of line blending, were derived via 2-D
cross-correlation with a program built on the principles of the
program TODCOR. The oxygen lines in the secondary spectra are weaker
than those in the model spectra of solar chemical composition. Using
the component spectra disentangled with the program KOREL, we find
that both components rotate considerably faster than would correspond
to the synchronization at periastron. The apside rotation known from
earlier studies is confirmed and compared to the theoretical value.
Description:
We present photographic light curves from O'Connell (1939,
Publications of the Riverview College Observatory, 2, 5),
uvby light curves from Gimenez et al. (1986A&AS...66...45G 1986A&AS...66...45G),
BVR light curves from 0.6 m reflector with a CCD camera, Mt. John,
New Zealand,
green light curve from Sonnar 4/135mm telephoto lens with a
CCD ATIK16IC camera, Sutherland, South Africa and
BVRI light curves from 0.3m Meade Schmidt-Cassegrain reflector with a
CCD camera.
Objects:
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RA (2000) DE Designation(s)
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11 42 49.68 -62 26 05.4 V346 Cen = V* V346 Cen
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea2.dat 18 287 V346 Cen: photographic observations by O'Connell
(1939, Publications of the Riverview College
Observatory, 2, 5) observations from primary
and secondary minima plus normal points
tablea3.dat 36 1056 V346 Cen du, dv, db, dy relative to HD 101466
from Gimenez et al. (1986A&AS...66...45G 1986A&AS...66...45G)
tablea4.dat 58 362 V346 Cen Mt. John differential photometry
relative to V916 Cen
tablea5.dat 26 1567 V346 Cen green CCD differential SAAO photometry
relative to HD 102152
tablea6.dat 77 1485 V346 Cen differential photometry relative to
CD-61 3157
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Byte-by-byte Description of file: tablea2.dat
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Bytes Format Units Label Explanations
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1- 9 F9.3 d RJD Reduced Julian date (HJD-2400000)
11- 15 F5.3 mag phmag Photographic magnitude
17- 18 I2 --- Nobs Number of observations (1)
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Note (1): N>1 for normal point at light maxima.
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Byte-by-byte Description of file: tablea3.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d RJD Reduced Julian date (HJD-2400000)
13- 18 F6.3 mag dumag Differential u magnitude relative to HD 101466
20- 24 F5.3 mag dvmag Differential v magnitude relative to HD 101466
26- 30 F5.3 mag dbmag Differential b magnitude relative to HD 101466
32- 36 F5.3 mag dymag Differential y magnitude relative to HD 101466
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Byte-by-byte Description of file: tablea4.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d RJDB Reduced Julian date for B band (HJD-2400000)
13- 18 F6.3 mag dBmag Differential B magnitude relative to V916 Cen
21- 31 F11.5 d RJDV ? Reduced Julian date for V band (HJD-2400000)
33- 38 F6.3 mag dVmag ? Differential V magnitude relative to V916 Cen
41- 51 F11.5 d RJDR ? Reduced Julian date for R band (HJD-2400000)
53- 58 F6.3 mag dRmag ? Differential R magnitude relative to V916 Cen
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Byte-by-byte Description of file: tablea5.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d RJD Reduced Julian date (HJD-2400000)
13- 19 F7.4 mag dmag Differential SAAO green magnitude relative
to HD 102152
21- 26 F6.4 mag e_dmag rms uncertainty on dmag
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Byte-by-byte Description of file: tablea6.dat
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Bytes Format Units Label Explanations
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1- 10 F10.4 d RJDB ? Reduced Julian date for B band (HJD-2400000)
12- 18 F7.4 mag dBmag ? Differential B magnitude relative to CD-61 3157
21- 30 F10.4 d RJDV ? Reduced Julian date for V band (HJD-2400000)
32- 38 F7.4 mag dVmag ? Differential V magnitude relative to CD-61 3157
41- 50 F10.4 d RJDR ? Reduced Julian date for R band (HJD-2400000)
52- 58 F7.4 mag dRmag ? Differential R magnitude relative to CD-61 3157
61- 70 F10.4 d RJDI Reduced Julian date for I band (HJD-2400000)
72- 77 F6.4 mag dImag Differential I magnitude relative to CD-61 3157
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Acknowledgements:
Pavel Mayer, mayer(at)cesnet.cz
(End) Patricia Vannier [CDS] 27-Jun-2016