Jet Properties of GeV-Selected Radio-Loud Narrow-Line Seyfert 1 Galaxies and Possible Connection to Their Disk and Corona

TL;DR

This study models the spectral energy distributions of GeV-selected narrow-line Seyfert 1 galaxies, revealing their jet properties resemble those of FSRQs and exploring potential links between jets, disks, and corona emissions.

Contribution

It provides the first detailed comparison of GeV NLS1 galaxies' jet and disk-corona properties with other active galactic nuclei, highlighting similarities to FSRQs and potential jet-disk/corona connections.

Findings

GeV NLS1 galaxies have jet properties similar to FSRQs.

Luminosity variations correlate with beaming factor, as in FSRQs.

The corona-to-disk luminosity ratio may influence jet power.

Abstract

The observed spectral energy distributions of five GeV-selected narrow-line Seyfert 1 (NLS1) galaxies are fitted with a model including the radiation ingredients from the relativistic jet, the accretion disk, and the corona. We compare the properties of these GeV NLS1 galaxies with flat spectrum radio quasars (FSRQs), BL Lacertae objects (BL Lacs) and radio-quiet (RQ) Seyfert galaxies, and explore possible hints for jet-disk/corona connection. Our results show that the radiation physics and the jet properties of the GeV NLS1 galaxies resemble that of FSRQs. The luminosity variations of PMN J0948+0022 and 1H 0323+342 at GeV band is tightly correlated with the beaming factor ({\delta}), similar to that observed in FSRQ 3C 279. The accretion disk luminosities and the jet powers of the GeV NLS1 galaxies cover both the ranges of FSRQs and BL Lacs. With detection of bright corona emission in 1H 0323+342, we show that the ratio of the corona luminosity (L_corona) to the accretion disk luminosity (L_d) is marginally within the high end of this ratio distribution for a RQ Seyfert galaxy sample, and the variation of jet luminosity may connect with Lcorona. However, it is still unclear whether a system with a high L_corona/L_d ratio prefers to power a jet.