WISE J233237.05–505643.5: A Double-peaked, Broad-lined Active Galactic Nucleus with a Spiral-shaped Radio Morphology
We present radio continuum mapping, optical imaging, and spectroscopy of the newly discovered double-peaked, broad-lined active galactic nucleus (AGN) WISE J233237.05–505643.5 at redshift z = 0.3447. This source exhibits an FR-I and FR-II hybrid morphology, characterized by a bright core, jet, and Doppler-boosted lobe structures in Australian Telescope Compact Array continuum maps at 1.5, 5.6, and 9 GHz. Unlike most FR-II objects, W2332–5056 is hosted by a disk-like galaxy. The core has a projected 5'' linear radio feature that is perpendicular to the curved primary jet, hinting at unusual and complex activity within the inner 25 kpc. The multi-epoch, optical-near-IR photometric measurements indicate significant variability over a 3-20 yr baseline from the AGN component. Gemini South optical data show unusual double-peaked emission-line features: the centroids of the broad-lined components of Hα and Hβ are blueshifted with respect to the narrow lines and host galaxy by ~3800 km s^(–1). We examine possible cases that involve single or double supermassive black holes in the system and discuss the required future investigations to disentangle the mysterious nature of this system.
Additional Information© 2013 American Astronomical Society. Received 2012 December 25; accepted 2013 October 5; published 2013 November 25. The authors thank the anonymous referee for the constructive comments and inspiring suggestions throughout the whole paper. We acknowledge Joaquin Vieira for verifying the W2332−5056 non-detection in the SPT survey map. We thank Roger Deane for sharing his VLBI work prior to the publication. We also appreciate the comments and suggestions by Colin Lonsdale and the discussions with Michael Eracleous and Laura Blecha in the "Binary Black Holes and Dual AGN" meeting in Tucson in 2012. R.J.A. was supported in part by Gemini-CONICYT grant number 32120009. R.J.A. was also supported in part by an appointment to the NASA Postdoctoral Program at the Jet Propulsion Laboratory, administered by Oak Ridge Associated Universities through a contract with NASA. This publication makes use of data products from WISE, which is a joint project of the University of California, Los Angeles and the Jet Propulsion Laboratory, California Institute of Technology, funded by the National Aeronautics and Space Administration. Based on observations obtained at the Gemini Observatory, which is operated by the Association of Universities for Research in Astronomy, Inc., under a cooperative agreement with the NSF on behalf of the Gemini partnership: the National Science Foundation (United States), the Science and Technology Facilities Council (United Kingdom), the National Research Council (Canada), CONICYT (Chile), the Australian Research Council (Australia), Ministrio da Ciencia, Tecnologa e Inovao (Brazil) and Ministerio de Ciencia, Tecnologa e Innovacin Productiva (Argentina). The Australia Telescope is funded by the Commonwealth of Australia for operation as a National Facility managed by CSIRO. This research has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research has made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. Facilities: ATCA (CABB), WISE, Spitzer (IRAC), SOAR (SOI imager), Gemini:South (GMOS spectrograph), CXO (ACIS-I)
Published - 0004-637X_779_1_41.pdf
Submitted - 1310.2257v1.pdf