J/MNRAS/433/394 BVRI light curves of KIC 6382916 (Ulusoy+, 2013)
Multisite photometric campaign on the high-amplitude δ Scuti star
KIC 6382916.
Ulusoy C., Ulas B., Gulmez T., Balona L.A., Stateva I., Iliev I.KH.,
Dimitrov D., Kobulnicky H.A., Pickering T.E., Fox Machado L., Alvarez M.,
Michel R., Antoniuk K., Shakhovskoy D.N., Pit N., Damasso M., Cenadelli D.,
Carbognani A.
<Mon. Not. R. Astron. Soc., 433, 394-401 (2013)>
=2013MNRAS.433..394U 2013MNRAS.433..394U
ADC_Keywords: Stars, variable ; Photometry, UBVRI
Keywords: stars: individual: KIC 6382916 - stars: oscillations -
stars: variables: δ Scuti
Abstract:
We present results of a multisite photometric campaign on the
high-amplitude δ Scuti star KIC 6382916 in the Kepler field. The
star was observed over a 85-d interval at five different sites in
North America and Europe during 2011. Kepler photometry and
ground-based multicolour light curves of KIC 6382916 are used to
investigate the pulsational content and to identify the principal
modes. High-dispersion spectroscopy was also obtained in order to
derive the stellar parameters and projected rotational velocity. From
an analysis of the Kepler time series, three independent frequencies
and a few hundred combination frequencies are found. The light curve
is dominated by two modes with frequencies f1=4.9107d-1 and
f2=6.4314d-1. The third mode with f3=8.0350d-1 has a much lower
amplitude. We attempt mode identification by examining the amplitude
ratios and phase differences in different wavebands from multicolour
photometry and comparing them to calculations for different spherical
harmonic degree, l. We find that the theoretical models for f1 and f2
are in a best agreement with the observations and lead to value of l=1
modes, but the mode identification of f3 is uncertain due to its low
amplitude. Non-adiabatic pulsation models show that frequencies below
6d-1 are stable, which means that the low frequency of f1 cannot be
reproduced. This is a further confirmation that current models predict
a narrower pulsation frequency range than actually observed.
Description:
Multicolour photometric data of the high-amplitude Delta Scuti star
KIC 6382916 are presented.
Objects:
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RA (2000) DE Designation(s)
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19 48 02.916 +41 46 55.69 KIC 6382916 = TYC 3144-595-1
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
photom.dat 27 63649 Observational points of KIC 6382916
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
Byte-by-byte Description of file: photom.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian date
16- 21 F6.3 mag dmag Differential magnitude, V-C (1)
23 A1 --- Filt [BVRI] Filter
25- 27 A3 --- Site Country
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Note (1): Magnitude difference between variable and comparison star
GSC 3144-0053.
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Acknowledgements:
Ceren Ulusoy, cerenuastro(at)gmail.com
(End) Patricia Vannier [CDS] 11-Dec-2013