KEPLER ECLIPSING BINARY STARS. III. CLASSIFICATION OF KEPLER ECLIPSING BINARY LIGHT CURVES WITH LOCALLY LINEAR EMBEDDING

By G. Matijevič, A. Prša, J. Orosz, W. Welsh, Steven Bloemen, T. Barclay. 2012

143 citations recorded by the source corpus.

We present an automated classification of 2165 Kepler eclipsing binary (EB) light curves that accompanied the second Kepler data release. The light curves are classified using locally linear embedding, a general nonlinear dimensionality reduction tool, into morphology types (detached, semi-detached, overcontact, ellipsoidal). The method, related to a more widely used principal component analysis, produces a lower-dimensional representation of the input data while preserving local geometry and, consequently, the similarity between neighboring data points. We use this property to reduce the dimensionality in a series of steps to a one-dimensional manifold and classify light curves with a single parameter that is a measure of “detachedness” of the system. This fully automated classification correlates well with the manual determination of morphology from the data release, and also efficiently highlights any misclassified objects. Once a lower-dimensional projection space is defined, the classification of additional light curves runs in a negligible time and the method can therefore be used as a fully automated classifier in pipeline structures. The classifier forms a tier of the Kepler EB pipeline that pre-processes light curves for the artificial intelligence based parameter estimator.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/4ee33333d2cc82220c839b05db111518dac6c8a9

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Citations in the corpus

• VALIDATION OF KEPLER'S MULTIPLE PLANET CANDIDATES. III. LIGHT CURVE ANALYSIS AND ANNOUNCEMENT OF HUNDREDS OF NEW MULTI-PLANET SYSTEMS (2014, background): “…binary catalog.18 Since we are interested in EBs that roughly match the signal from a transiting extrasolar planet we only considered EBs that are detached based on having a morphological classification criteria less than 0.5 (Matijevic et al. 2012) and have a primary eclipse depth less than 2%.”
• KEPLER ECLIPSING BINARY STARS. VII. THE CATALOG OF ECLIPSING BINARIES FOUND IN THE ENTIRE KEPLER DATA SET (2015, methodology): “…via Locally Linear Embedding (LLE; Section 6), a nonlinear dimensionality reduction tool is used to estimate the “detachedness” of the system (Matijevič et al. 2012, hereafter Paper III); (7) EB characterization through geometric analysis and (8) diagnostic plot generation for false…”
• REVISED STELLAR PROPERTIES OF KEPLER TARGETS FOR THE QUARTER 1–16 TRANSIT DETECTION RUN (2013, background): “…key discoveries in stellar astrophysics such as the detection of more than 2000 eclipsing binary stars (Prša et al. 2011; Slawson et al. 2011; Matijevič et al. 2012) including eclipsing triple systems (Carter et al. 2011; Derekas et al. 2011), the 19 Center for High Angular Resolution…”
• TESS Eclipsing Binary Stars. I. Short-cadence Observations of 4584 Eclipsing Binaries in Sectors 1–26 (2021, methodology): “Morphology Classification For morphological classification of the light curves, we rely on the morphology parameter as defined in Matijevič et al. (2012).”
• A comprehensive study of the Kepler triples via eclipse timing (2015, methodology): “The seventh rejected system, KIC 06302592, has a morphological classification (Matijevic et al. 2012) value of 0.93, indicating this system is an ELV binary, although the folded, averaged lightcurve reveals clear, very low amplitude grazing eclipses.”
• Rotation periods of 12 000 main-sequence Kepler stars: Dependence on stellar spectral type and comparison with v sin i observations (2013, background): “From an initial sample of 192 668 stars, we discarded targets that are known eclipsing binaries (Matijevič et al. 2012), planet”
• THE CATALINA SURVEYS PERIODIC VARIABLE STAR CATALOG (2014, methodology): “Deeper searches for variability, in much smaller fields, have been carried out by QUEST (Vivas et al. 2004), LONEOS (Miceli et al. 2008), MOTESS-GNAT-1 (MG1, Krauss et al. 2007), Kepler (Matijevic et al. 2012) and SDSS Stripe-82 (Sesar et al. 2007, Bhatti et al. 2010, Becker et al. 2011).”