J/ApJ/833/170 Spots parameters for LCs of the EB star KIC 6048106 (Lee, 2016)
γ Doradus pulsations in the eclipsing binary star KIC 6048106.
Lee J.W.
<Astrophys. J., 833, 170-170 (2016)>
=2016ApJ...833..170L 2016ApJ...833..170L (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry
Keywords: binaries: eclipsing; stars: individual: KIC 6048106;
stars: oscillations including pulsations; starspots
Abstract:
We present the Kepler photometry of KIC 6048106, which is exhibiting
the O'Connell effect and multiperiodic pulsations. Including a
starspot on either of the components, light-curve synthesis indicates
that this system is a semi-detached Algol with a mass ratio of 0.211,
an orbital inclination of 73.9°, and a large temperature
difference of 2534K. To examine in detail both the spot variations and
pulsations, we separately analyzed the Kepler time-series data at the
interval of an orbital period in an iterative way. The results reveal
that the variable asymmetries of the light maxima can be interpreted
as the changes with time of a magnetic cool spot on the secondary
component. Multiple frequency analyses were performed in the
outside-eclipse light residuals after removal of the binarity effects
from the observed Kepler data. We detected 30 frequencies with signal
to noise amplitude ratios larger than 4.0, of which six (f2-f6 and
f10) can be identified as high-order (17≤n≤25) low-degree (l=2)
gravity-mode pulsations that were stable during the observing run of
200 days. In contrast, the other frequencies may be harmonic and
combination terms. For the six frequencies, the pulsation periods and
pulsation constants are in the ranges of 0.352-0.506 days and
0.232-0.333 days, respectively. These values and the position on the
Hertzsprung-Russell diagram demonstrate that the primary star is a
γ Dor variable. The evolutionary status and the pulsation nature
of KIC 6048106 are discussed.
Description:
KIC 6048106 was observed in a long cadence (LC) mode of 29.42min
during Quarters 14 and 15 (June and October 2012) by the Kepler
satellite. For this study, we used the simple aperture photometry data
detrended in the Kepler EB catalog (Prsa+ 2011, J/AJ/141/83 superseded
by Slawson+ 2011, J/AJ/142/160).
Objects:
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RA (ICRS) DE Designation(s) (Period)
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19 34 14.03 +41 23 43.3 KIC 6048106 = KIC 6048106 (P=1.559359)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 32 113 Epoch and spot parameters for each light curve
of KIC 6048106
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/ApJS/224/19 : The KepVIM catalog (Makarov+, 2016)
J/ApJS/224/12 : Kepler planetary candidates. VII. 48-month (Coughlin+, 2016)
J/AJ/151/68 : Kepler Mission. VII. Eclipsing binaries in DR3 (Kirk+, 2016)
J/AJ/149/68 : A-F type variable stars from Kepler (Bradley+, 2015)
J/ApJ/820/1 : Kepler light curve of the EB star KIC 9532219 (Lee+, 2016)
J/ApJ/812/46 : Transit metric for Q1-Q17 Kepler candidates (Thompson+, 2015)
J/ApJS/211/2 : Revised properties of Q1-16 Kepler targets (Huber+, 2014)
J/AJ/142/160 : Kepler Mission. II. Eclipsing binaries in DR2 (Slawson+, 2011)
J/AJ/141/83 : Kepler Mission. I. Eclipsing binaries in DR1 (Prsa+, 2011)
J/MNRAS/373/435 : Angular momentum of Algol binaries (Ibanoglu+, 2006)
J/AJ/129/2815 : Eleven new γ Doradus variables (Henry+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Barycentric Julian Date of observation
15- 20 F6.2 deg lambda [14.5/131.8] Spot longitude
22- 26 F5.2 deg rs [11/13.4] Spot angular radius
28- 32 F5.3 --- Ts [0.82/0.97] Temperature factor
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 25-Apr-2017