J/ApJS/256/11 Short period eclipsing binaries from Kepler data (Bienias+, 2021)
Background short-period eclipsing binaries in the original Kepler field.
Bienias J., Bodi A., Forro A., Hajdu T., Szabo R.
<Astrophys. J. Suppl. Ser., 256, 11-11 (2021)>
=2021ApJS..256...11B 2021ApJS..256...11B (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing; Magnitudes, absolute; Stars, masses;
Stars, diameters; Optical
Keywords: Space telescopes; Contact binary stars; Eclipsing binary stars
W Ursae Majoris variable stars
Abstract:
During the primary Kepler mission, between 2009 and 2013, about
150,000 preselected targets were observed with a 29.42 minute long
cadence. However, a survey of background stars that fall within the
field of view (FOV) of the downloaded apertures of the primary targets
has revealed a number of interesting objects. In this paper, we
present the results of this search, focusing on short-period eclipsing
binary (SPEB) stars in the background pixels of primary Kepler
targets. We used Lomb-Scargle and Phase Dispersion Minimization
methods to reveal pixels that show significant periodicities,
resulting in the identification of 547 previously unknown faint SPEBs,
mostly W UMa-type stars, and almost doubling the number of SPEBs in
the original Kepler FOV. We prepared the light curves for scientific
analysis and cross-matched the pixel coordinates with Gaia and other
catalogs to identify the possible sources. We have found that the mean
of the brightness distribution of the new background SPEBs is ∼4-5mag
fainter than other, primary target eclipsing binaries in the Kepler
Eclipsing Binary catalog. The period distribution nonetheless follows
the same trend, but the spatial distribution appears to be different
from that described by Kirk+ (2016, J/AJ/151/68) for the catalog
eclipsing binaries.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 197 547 Eclipsing binary class, period and source data
table5.dat 70 446 Eclipsing binary physical parameters
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
J/AJ/147/45 : Kepler mission. IV. Eclipse times for bin. (Conroy+, 2014)
J/AcA/65/39 : OGLE Gal. Bulge ultra-short-per. binaries (Soszynski+, 2015)
J/MNRAS/448/429 : Starspots in short-period Kepler binaries (Balaji+, 2015)
J/MNRAS/448/946 : Kepler eclipse timing variation analyses (Borkovits+, 2015)
J/MNRAS/455/4136 : Kepler triples (Borkovits+, 2016)
J/AJ/151/68 : Kepler Mission. VII. Eclipsing binaries in DR3 (Kirk+, 2016)
J/AJ/156/18 : APOGEE: companions of evolved stars (Price-Whelan+, 2018)
J/AJ/157/174 : Transiting planets in Kepler-47 system (Orosz+, 2019)
J/ApJS/255/1 : Morphology of OGLE LCs of Eclipsing binaries (Bodi+, 2021)
http://konkoly.hu/KIK/data_en.html : Kepler light curve data
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Kepler Input Catalog identifier (G1)
10- 12 A3 --- Cl Visual classification (1)
14- 18 F5.3 --- Morph [0.44/0.99] Classification (2)
20- 27 F8.4 d BJD0 Barycentric Julian Date of zero epoch;
JD-2454833
29- 37 F9.7 d PMD [0.18/1] Phase Dispersion Minimisation period
39- 47 F9.7 d LS [0.18/1] Lomb-Scargle period
49- 57 A9 --- --- [Gaia EDR3]
59- 77 I19 --- Gaia1 Gaia EDR3 candidate 1 for the binary
79- 87 A9 --- --- [Gaia EDR3]
89-107 I19 --- Gaia2 ? Gaia EDR3 candidate 2 for the binary if any
109-117 A9 --- --- [Gaia EDR3]
119-137 I19 --- Gaia3 ? Gaia EDR3 candidate 3 for the binary if any
139-147 A9 --- --- [Gaia EDR3]
149-167 I19 --- Gaia4 ? Gaia EDR3 candidate 4 for the binary if any
169-177 A9 --- --- [Gaia EDR3]
179-197 I19 --- Gaia5 ? Gaia EDR3 candidate 5 for the binary if any
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Note (1): Classification given to the binary by visual inspection as follows:
EA = Algol type (7 occurrences);
EB = β Lyrae type (14 occurrences);
EW = W UMa type (446 occurrences);
ELL = ellipsoidal type (80 occurrences).
Note (2): In the range of 0-1, given to the binary based on the light curve
morphology described in section 2.5, where high values indicate
an ellipsoidal type and low values an Algol type.
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1- 8 I8 --- KIC Kepler Input Catalog identifier (G1)
10- 18 F9.7 d PMD [0.18/0.5] Phase Dispersion Minimisation period
20- 28 F9.7 d LS [0.18/0.5] Lomb-Scargle period
30- 34 F5.3 mag VMag [2.8/6.5] Estimated absolute Johnson V band
Vega magnitude
36- 40 F5.3 Msun M1 [0.7/1.6] Estimated primary mass
42- 46 F5.3 Msun M2 [0.3/0.5] Estimated secondary mass
48- 52 F5.3 Rsun a [1.3/2.1] Estimated orbital semi-major axis
54- 58 F5.3 --- q [0.27/0.42] Mass ratio; M2/M1
60- 64 F5.3 Rsun R1 [0.6/1.1] Estimated primary radius
66- 70 F5.3 Rsun R2 [0.4/0.6] Estimated secondary radius
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Global notes:
Note (G1): This is the Kepler target aperture in which the candidate binary was
found. It does not refer to the candidate itself.
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 28-Dec-2021