WISE J233237.05-505643.5: A Double-peaked, Broad-lined Active Galactic Nucleus with a Spiral-shaped Radio Morphology
Abstract
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.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- December 2013
- DOI:
- arXiv:
- arXiv:1310.2257
- Bibcode:
- 2013ApJ...779...41T
- Keywords:
-
- galaxies: active;
- galaxies: individual: WISE J233237.05–505643.5;
- galaxies: interactions;
- galaxies: jets;
- galaxies: nuclei;
- radio continuum: galaxies;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 15 pages in emulateapj format, including 4 tables and 8 figures. To be published in ApJ