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The Quasar SDSS J1536+0441: An Unusual Double-Peaked Emitter
- Publication Year :
- 2009
-
Abstract
- The quasar SDSS J153636.22+044127.0, exhibiting peculiar broad emission-line profiles with multiple components, was proposed as a candidate sub-parsec binary supermassive black hole system. More recently, imaging revealed two spatially distinct sources, leading some to suggest the system to be a quasar pair separated by ~5 kpc. We present Palomar and Keck optical spectra of this system from which we identify a third velocity component to the emission lines. We argue that the system is more likely an unusual member of the class of active galactic nuclei (AGNs) known as "double-peaked emitters" than a sub-parsec black hole binary or quasar pair. We find no significant velocity evolution of the two main peaks over the course of 0.95 yr, with a 3-sigma upper limit on any secular change of 70 km/s/yr. We also find that the three velocity components of the emission lines are spatially coincident to within 0.015" along the slit, apparently ruling out the double-quasar hypothesis.<br />Comment: ApJL, 5 pages, 3 figures, revised to match accepted version
Details
- Database :
- arXiv
- Publication Type :
- Report
- Accession number :
- edsarx.0906.0849
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1088/2041-8205/709/1/L39