A large jet narrow-line Seyfert 1 galaxy: observations from pc to 100 kpc scales
Abstract
We present new 1.5-8.5 GHz Very Long Baseline Array (VLBA) observations and 0.32-1.26 GHz Giant Meterwave Radio Telescope (GMRT) observations of J0354-1340, which is the only known radio-quiet (RQ) or radio-intermediate (RI) narrow-line Seyfert 1 galaxy with a 100-kpc two-sided radio jet. A pc-scale one-sided jet in the southeast direction from the core emission is found in the VLBA observations, while the kpc-scale jet observed with Karl G. Jansky Very Large Array (VLA) and GMRT is in the south-north direction. The core spectra on pc and kpc scales are presented in combination with the archival VLASS observations at 3.0 GHz and the VLA C configuration observations at 5.5 GHz. The pc-scale emission dominates the kpc-scale emission above ~ 5 GHz, and the spectrum is inverted due to synchrotron self-absorption. This indicates a compact synchrotron source with a size of ~ 0.04 pc, which is associated with either the jet base or the corona. A sub-kpc scale jet, which is unresolved on scales of ~ 3 arcsec, probably dominates the emission below ~ 5 GHz. Future radio observations can explore the jet structure between the pc and 100 kpc scales, the origin of their direction mismatch, and the pc-scale jet proper motion. It remains to be explored how common such large-scale jets are in RQ or RI AGN.
Keywords
Cite
@article{arxiv.2312.13351,
title = {A large jet narrow-line Seyfert 1 galaxy: observations from pc to 100 kpc scales},
author = {Sina Chen and Preeti Kharb and Silpa Sasikumar and Sumana Nandi and Marco Berton and Emilia Jarvela and Ari Laor and Ehud Behar and Luigi Foschini and Amelia Vietri and Minfeng Gu and Giovanni La Mura and Luca Crepaldi and Minhua Zhou},
journal= {arXiv preprint arXiv:2312.13351},
year = {2023}
}
Comments
Accepted for publication in ApJ