An Updated Catalog of 4680 Northern Eclipsing Binaries with Algol-type Light-curve Morphology in the Catalina Sky Surveys

Creators: Papageorgiou, Athanasios; Catelan, Márcio; Christopoulou, Panagiota-Eleftheria; Drake, Andrew J.; Djorgovski, S. G.

Abstract

We present an updated catalog of 4680 northern eclipsing binaries (EBs) with Algol-type light-curve (LC) morphology (i.e., with well-defined beginnings and ends of primary and secondary eclipses), using data from the Catalina Sky Surveys. Our work includes revised period determinations, phenomenological parameters of the LCs, and system morphology classifications based on machine-learning techniques. While most of the new periods are in excellent agreement with those provided in the original Catalina catalogs, improved values are now available for ~10% of the stars. A total of 3456 EBs were classified as detached and 449 were classified as semi-detached, while 145 could not be classified unambiguously into either subtype. The majority of the SD systems seem to be comprised of short-period Algols. By applying color criteria, we searched for K- and M-type dwarfs in these data, and present a subsample of 609 EB candidates for further investigation. We report 119 EBs (2.5% of the total sample) that show maximum quadrature light variations over long timescales, with periods bracketing the range 4.5–18 years and a fractional luminosity variance range of 0.04–0.13. We discuss possible causes for this, making use of models of variable starspot activity in our interpretation of the results.

Additional Information

© 2018. The American Astronomical Society. Received 2018 April 14; revised 2018 June 30; accepted 2018 July 21; published 2018 September 5. A.P. and M.C. gratefully acknowledge the support provided by Fondecyt through grants #3160782 and #1171273. Additional support for this project is provided by the Ministry for the Economy, Development, and Tourism's Millennium Science Initiative through grant IC 120009, awarded to the Millennium Institute of Astrophysics (MAS); by Proyecto Basal PFB-06/2007; and by CONICYT's PCI program through grant DPI20140066. M.C. gratefully acknowledges the additional support provided by the Carnegie Observatories through its Distinguished Scientific Visitor program. The Monte Carlo script in PHOEBE-scripter is based on the script that was kindly provided by Dr. Andrej Prša. This work made use of data products from the CSS survey. The CSS survey is funded by the National Aeronautics and Space Administration under grant No. NNG05GF22G issued through the Science Mission Directorate Near-Earth Objects Observations Program. The CRTS survey is supported by the US National Science Foundation under grants AST-0909182, AST-1313422, AST-1413600, and AST-1518308. This publication makes use of data products from the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation. Funding for SDSS-III has been provided by the Alfred P. Sloan Foundation, the Participating Institutions, the National Science Foundation, and the U.S. Department of Energy Office of Science. The SDSS-III website is http://www.sdss3.org/. This publication makes use of data products from SDSS-III. SDSS-III is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS-III Collaboration including the University of Arizona, the Brazilian Participation Group, Brookhaven National Laboratory, Carnegie Mellon University, University of Florida, the French Participation Group, the German Participation Group, Harvard University, the Instituto de Astrofisica de Canarias, the Michigan State/Notre Dame/JINA Participation Group, Johns Hopkins University, Lawrence Berkeley National Laboratory, Max Planck Institute for Astrophysics, Max Planck Institute for Extraterrestrial Physics, New Mexico State University, New York University, Ohio State University, Pennsylvania State University, University of Portsmouth, Princeton University, the Spanish Participation Group, University of Tokyo, University of Utah, Vanderbilt University, University of Virginia, University of Washington, and Yale University. This work has made use of the SIMBAD database, operated at CDS, Strasbourg, France. This research was made possible through the use of the AAVSO Photometric All-Sky Survey (APASS), funded by the Robert Martin Ayers Sciences Fund. Software: AstroML (VanderPlas et al. 2012), CKP (Protopapas et al. 2015), FATS (Nun et al. 2015), LMFIT (Newville et al. 2016), mwdust (Bovy et al. 2016), PDM (Stellingwerf 1978), PHOEBE-scripter (Prša & Zwitter 2005), PHOEBE-2.0 (Prša et al. 2016), pyMC (Fonnesbeck et al. 2015), scikit-learn (Pedregosa et al. 2012), triangle.py-v0.1.1 (Foreman-Mackey et al. 2014), VARTOOLS (Hartman & Bakos 2016).

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