Tale of J1328+2752: a misaligned double-double radio galaxy hosted by a binary black hole?
Abstract
We present a radio and optical study of the double-double radio galaxy J1328+2752 based on new low-frequency Giant Metrewave Radio Telescope observations and Sloan Digital Sky Survey (SDSS) data. The radio data were used to investigate the morphology and to perform a spectral index analysis. In this source, we find that the inner double is misaligned by ∼30° from the axis of the outer diffuse structure. The SDSS spectrum shows that the central component has double-peaked line profiles with different emission strengths. The average velocity off-set of the two components is 235 ± 10.5 km s-1. The misaligned radio morphology along with the double-peaked emission lines indicate that this source is a potential candidate binary supermassive black hole. This study further supports mergers as a possible explanation for repeated jet activity in radio sources.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- May 2017
- DOI:
- 10.1093/mnrasl/slw256
- arXiv:
- arXiv:1612.06452
- Bibcode:
- 2017MNRAS.467L..56N
- Keywords:
-
- line: identification;
- line: profiles;
- galaxies: active;
- galaxies: individual: J1328+2752;
- galaxies: nuclei;
- radio continuum: galaxies;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Cosmology and Nongalactic Astrophysics
- E-Print:
- 6 pages, 4 figures, Accepted for publication in MNRAS Letters