A systematic search for close supermassive black hole binaries in the Catalina Real-time Transient Survey

Hierarchical assembly models predict a population of supermassive black hole (SMBH) binaries. These are not resolvable by direct imaging but may be detectable via periodic variability (or nanohertz frequency gravitational waves). Following our detection of a 5.2-year periodic signal in the quasar PG...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2015-10, Vol.453 (2), p.1562-1576
Main Authors: Graham, Matthew J., Djorgovski, S. G., Stern, Daniel, Drake, Andrew J., Mahabal, Ashish A., Donalek, Ciro, Glikman, Eilat, Larson, Steve, Christensen, Eric
Format: Article
Language:English
Subjects:
Astronomy
Binary system
Black holes
Quasars
Spectrum analysis
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Summary:Hierarchical assembly models predict a population of supermassive black hole (SMBH) binaries. These are not resolvable by direct imaging but may be detectable via periodic variability (or nanohertz frequency gravitational waves). Following our detection of a 5.2-year periodic signal in the quasar PG 1302−102, we present a novel analysis of the optical variability of 243 500 known spectroscopically confirmed quasars using data from the Catalina Real-time Transient Survey (CRTS) to look for close (
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stv1726