The radio structure of the peculiar narrow-line Seyfert 1 galaxy candidate J1100+4421
Abstract
Narrow-line Seyfert 1 galaxies (NLS1) are an intriguing subclass of active galactic nuclei. Their observed properties indicate low central black hole mass and high accretion rate. The extremely radio-loud NLS1 sources often show relativistic beaming and are usually regarded as younger counterparts of blazars. Recently, the object SDSS J110006.07+442144.3 was reported as a candidate NLS1 source. The characteristics of its dramatic optical flare indicated its jet-related origin. The spectral energy distribution of the object was similar to that of the γ-ray detected radio-loud NLS1, PMN J0948+0022. Our high-resolution European very long baseline interferometry network observations at 1.7 and 5 GHz revealed a compact core feature with a brightness temperature of ≳1010 K. Using the lowest brightness temperature value and assuming a moderate Lorentz factor of ∼9, the jet viewing angle is ≲26°. Archival Very Large Array data show a large-scale radio structure with a projected linear size of ∼150 kpc reminiscent of double-sided morphology.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- January 2018
- DOI:
- 10.1093/mnras/stx2449
- arXiv:
- arXiv:1709.07202
- Bibcode:
- 2018MNRAS.473.1554G
- Keywords:
-
- galaxies: active;
- galaxies: individual: SDSS J110006.07+442144.3;
- galaxies: Seyfert;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 8 pages, 5 figures. Accepted for publication in MNRAS