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J/ApJ/835/189             KIC 11401845 eclipse timings              (Lee+, 2017)

KIC 11401845: an eclipsing binary with multiperiodic pulsations and light-travel time. Lee J.W., Hong K., Kim S.-L., Koo J.-R. <Astrophys. J., 835, 189-189 (2017)> =2017ApJ...835..189L (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry Keywords: binaries: eclipsing; stars: fundamental parameters; stars: individual: KIC 11401845; stars: oscillations including pulsations Abstract: We report the Kepler photometry of KIC 11401845 displaying multiperiodic pulsations, superimposed on binary effects. Light-curve synthesis shows that the binary star is a short-period detached system with a very low mass ratio of q=0.070 and filling factors of F1=45% and F2=99%. Multiple-frequency analyses were applied to the light residuals after subtracting the synthetic eclipsing curve from the observed data. We detected 23 frequencies with signal-to-noise ratios larger than 4.0, of which the orbital harmonics (f4, f6, f9, f15) in the low-frequency domain may originate from tidally excited modes. For the high frequencies of 13.7-23.8day-1, the period ratios and pulsation constants are in the ranges of Ppul/Porb=0.020-0.034 and Q=0.018-0.031days, respectively. These values and the position on the Hertzsprung-Russell diagram demonstrate that the primary component is a δ Sct pulsating star. We examined the eclipse timing variation of KIC 11401845 from the pulsation-subtracted data and found a delay of 56±17s in the arrival times of the secondary eclipses relative to the primary eclipses. A possible explanation of the time shift may be some combination of a light-travel-time delay of about 34s and a very small eccentricity of e.cosω<0.0002. This result represents the first measurement of the Romer delay in noncompact binaries. Description: The Kepler data of KIC 11401845 were obtained in a long-cadence mode of 29.42 minutes during Quarters 10 (Jun-Aug 2011) and 12 (Jan-Mar 2012). Objects: -------------------------------------------------------------------- RA (ICRS) DE Designation(s) (Period) -------------------------------------------------------------------- 19 25 11.28 +49 14 40.1 KIC 11401845 = KIC 11401845 (P=2.1613) -------------------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 72 150 Eclipse timings measured from both datasets including and removing the pulsations
See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) J/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993) J/MNRAS/373/435 : Angular momentum evolution of Algol binaries (Ibanoglu+, 2006) J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010) J/ApJ/753/101 : Kepler eclipse timings of KIC 9472174 (Barlow+, 2012) J/A+A/557/A79 : Spectra of KIC10661783 (Lehmann+, 2013) J/AJ/147/104 : Photometry and velocities of 1SWASP J093010A and B (Koo+, 2014) J/AJ/148/37 : Long-term photometric behavior of V404 Lyr (Lee+, 2014) J/ApJ/812/46 : Transit metric for Q1-Q17 Kepler candidates (Thompson+, 2015) J/AJ/151/68 : Kepler Mission. VII. Eclipsing binaries in DR3 (Kirk+, 2016) J/ApJ/833/170 : Spots parameters for LCs of the EB star KIC 6048106 (Lee, 2016) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 13 F13.5 d O-BJD Observed Barycentric Julian Date 15- 21 F7.5 d e_O-BJD [0.0001/0.003] Error in O-BJD 23- 31 F9.6 d O-(O-C1) [-0.0009/0.002] The (O-C) residual for observed data 33- 37 F5.1 --- Epoch Epoch 39- 40 A2 --- Min Minimum type ("I": orbital phase 0.0 or "II": orbital phase 0.5) 42- 54 F13.5 d PS-BJD Pulsation-Subtracted Barycentric Julian Date 56- 62 F7.5 d e_PS-BJD [0.0001/0.0008] Error in PS-BJD 64- 72 F9.6 d PS-(O-C2) [-0.0008/0.0008] The (O-C) residual for Pulsation-Subtracted data
History: From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 31-Aug-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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