X-ray and γ-ray emissions from NLSy1 galaxies
Abstract
The recent observations by Fermi large area telescope (Fermi-LAT) showed that in addition to the radio galaxies and blazars, Narrow-Line Seyfert 1 (NLSy1) galaxies are also γ-rays emitters. NLSy1 are AGNs with optical spectral properties similar to those of Seyfert 1 galaxies, except for having narrow Balmer lines and strong optical lines. They also exhibit strong X-ray variability, steep X-ray spectra and relatively high luminosity. The multiwavelength emission properties of 1H 0323+342, SBS 0846+513 and PMN J0948+0022 are discussed, using the γ-ray data from the last 8.8 years Fermi-LAT observations as well as available Swift(UVOT/XRT) data. It is shown that one-zone synchrotron/synchrotron self-Compton (SSC) model can satisfactorily reproduce their observed broadband spectra.
- Publication:
-
International Journal of Modern Physics D
- Pub Date:
- 2018
- DOI:
- 10.1142/S0218271818440017
- Bibcode:
- 2018IJMPD..2744001B
- Keywords:
-
- Narrow-Line Seyfert 1;
- jet;
- X-ray;
- γ-ray;
- 98.54.Cm;
- 98.58.Fd;
- 95.85.Nv;
- 95.85.Pw;
- Active and peculiar galaxies and related systems;
- Jets outflows and bipolar flows;
- X-ray;
- gamma-ray