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J/MNRAS/448/946    Kepler eclipse timing variation analyses   (Borkovits+, 2015)

Eclipse timing variation analyses of eccentric binaries with close tertiaries in the Kepler field. Borkovits T., Rappaport S., Hajdu T., Sztakovics J. <Mon. Not. R. Astron. Soc., 448, 946-993 (2015)> =2015MNRAS.448..946B (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Binaries, eclipsing ; Models Keywords: methods: analytical - binaries: close - binaries: eclipsing Abstract: We report eclipse timing variation analyses of 26 compact hierarchical triple stars comprised of an eccentric eclipsing ("inner") binary and a relatively close tertiary component found in the Kepler field. We simultaneously fit the primary and secondary O-C curves of each system for the light-traveltime effect (LTTE), as well as dynamical perturbations caused by the tertiary on different time-scales. For the first time, we include those contributions of three-body interactions which originate from the eccentric nature of the inner binary. These effects manifest themselves both on the period of the triple system, P2, and on the longer "apse-node" time-scale. We demonstrate that consideration of the dynamically forced rapid apsidal motion yields an efficient and independent tool for the determination of the binary orbit's eccentricity and orientation, as well as the 3D configuration of the triple. Modelling the forced apsidal motion also helps to resolve the degeneracy between the shapes of the LTTE and the dynamical delay terms on the P2 time-scale, due to the strong dependence of the apsidal motion period on the triple's mass ratio. This can lead to the independent determination of the binary and tertiary masses without the need for independent radial velocity measurements. Through the use of our analytic method for fitting O-C curves, we have obtained robust solutions for system parameters for the 10 most ideal triples of our sample, and only somewhat less robust, but yet acceptable, fits for the remaining systems. Finally, we study the results of our 26 system parameter fits via a set of distributions of various physically important parameters, including mutual inclination angle, and mass and period ratios. Description: The present version of the Kepler EB Catalog ( (Conroy et al. 2014, J/AJ/147/45) contains 2645 EBs. We selected our systems from that sample. We started our search for the appropriate compact hierarchical triple stars (CHTs) with the construction of O-C ("observed minus calculated" eclipse times) curves for the primary and, when possible, the secondary, eclipses for all 2645 binaries. At the same time, we also produced folded light curves for each binary. In all, we found some 400 binary systems that have interesting (i.e. non-linear) O-C curves (see also Rappaport et al. 2013ApJ...768...33R; Conroy et al. 2014, J/AJ/147/45). However, most of these tend to be either parabolically shaped or have sinusoidal shapes with a period comparable to, or longer than, the Kepler mission. The majority of these are probably triple systems, as indicated by the presence of perturbations that are likely due to a third body in the system, but are otherwise not particularly interesting for this study. We then restricted our attention only to the subset of these systems. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 51 26 List of stars tablef1.dat 27 242 Times of minima of KIC 04940201 tablef2.dat 27 59 Times of minima of KIC 05255552 tablef3.dat 27 55 Times of minima of KIC 05653126 tablef4.dat 27 671 Times of minima of KIC 06545018 tablef5.dat 27 503 Times of minima of KIC 07289157 tablef6.dat 27 71 Times of minima of KIC 07812175 tablef7.dat 27 160 Times of minima of KIC 08023317 tablef8.dat 27 115 Times of minima of KIC 08210721 tablef9.dat 27 361 Times of minima of KIC 08938628 tablef10.dat 27 337 Times of minima of KIC 09714358 tablef11.dat 27 179 Times of minima of KIC 05771589 tablef12.dat 27 200 Times of minima of KIC 06964043 tablef13.dat 27 98 Times of minima of KIC 07668648 tablef14.dat 27 177 Times of minima of KIC 07955301 tablef15.dat 27 83 Times of minima of KIC 04769799 tablef16.dat 27 66 Times of minima of KIC 05003117 tablef17.dat 27 298 Times of minima of KIC 05731312 tablef18.dat 27 92 Times of minima of KIC 07670617 tablef19.dat 27 91 Times of minima of KIC 08143170 tablef20.dat 27 205 Times of minima of KIC 09715925 tablef21.dat 27 53 Times of minima of KIC 09963009 tablef22.dat 27 113 Times of minima of KIC 10268809 tablef23.dat 27 38 Times of minima of KIC 10319590 tablef24.dat 27 223 Times of minima of KIC 10979716 tablef25.dat 27 123 Times of minima of KIC 11519226 tablef26.dat 27 87 Times of minima of KIC 12356914
See also: V/133 : Kepler Input Catalog (Kepler Mission Team, 2009) J/AJ/143/137 : Minima of 41 eclipsing binaries from a Kepler survey (Gies+, 2012) J/AJ/147/45 : Kepler mission. IV. Eclipse times for close binaries (Conroy+, 2014) J/MNRAS/455/4136 : Kepler triples (Borkovits+, 2016) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [KIC] 5- 12 I8 --- KIC [04769799/12356914] Kepler Input Catalog identifier 14- 15 I2 h RAh Simbad Hour of Right Ascension (J2000) 17- 18 I2 min RAm Simbad Minute of Right Ascension (J2000) 20- 25 F6.3 s RAs Simbad Second of Right Ascension (J2000) 27 A1 --- DE- Simbad Sign of the Declination (J2000) 28- 29 I2 deg DEd Simbad Degree of Declination (J2000) 31- 32 I2 arcmin DEm Simbad Arcminute of Declination (J2000) 34- 38 F5.2 arcsec DEs Simbad Arcsecond of Declination (J2000) 40- 51 A12 --- FileName File name containing data for this star
Byte-by-byte Description of file: tablef*.dat
Bytes Format Units Label Explanations
1- 12 F12.6 d BJD Barycentric Julian Date (BJD-2400000) 14- 18 F5.1 --- Cycle [-1.5/365.0] Cycle number 20- 27 F8.6 d Stdev Standard deviation
History: From electronic version of the journal
(End) Tiphaine Pouvreau [CDS] 15-Nov-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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