Blazar nuclei in radio-loud narrow-line Seyfert 1?
arXiv:0901.0167 · doi:10.1016/j.asr.2008.12.021
Abstract
It has been suggested that some radio-loud narrow-line Seyfert 1 contain relativistic jets, on the basis of their flat-spectrum radio nuclei and studies on variability. We present preliminary results of an ongoing investigation of the X-ray and multiwavelength properties of 5 radio-loud NLS1 based on archival data from Swift and XMM-Newton. Some sources present interesting characteristics, very uncharacteristic for a radio-quiet narrow-line Seyfert 1, such as very hard X-ray spectra, and correlated optical and ultraviolet variability. However, none of the studied sources show conclusive evidence for relativistic jets. gamma-ray observations with Fermi are strongly recommended to definitely decide on the presence or not of relativistic jets.
9 pages, 4 figures. Talk presented at the 37th COSPAR Assembly (Montreal, Canada, July 13-20, 2008), Session E17. Accepted for publication on Advances in Space Research
References in corpus (16)
- A Comprehensive Study of 2 000 Narrow Line Seyfert 1 Galaxies from the Sloan Digital Sky Survey: I. The Sample
- Radio-loud Narrow-Line Type 1 Quasars
- The 3rd IBIS/ISGRI soft gamma-ray survey catalog
- The blazar sequence: a new perspective
- A Population of Radio-loud Narrow Line Seyfert 1 Galaxies with Blazar-like Properties?
- INTEGRAL/IBIS all-sky survey in hard X-rays
- A narrow line Seyfert 1--blazar composite nucleus in 2MASX J0324+3410
- On the Evolution of and High-Energy Emission from GHz-Peaked-Spectrum Sources
- The Blazar Sequence: Validity and Predictions
- The spectral energy distribution of PKS 2004-447: a compact steep-spectrum source and possible radio-loud narrow-line Seyfert 1 galaxy
- Simultaneous X-ray and optical observations of S5 0716+714 after the outburst of March 2004
- Swift-XRT observation of 34 new INTEGRAL/IBIS AGNs: discovery of Compton thick and other peculiar sources
- X-ray/UV/Optical follow-up of the blazar PKS 2155-304 after the giant TeV flares of July 2006
- XMM-Newton observations of a sample of gamma-ray loud active galactic nuclei
- Testing the blazar spectral sequence: X-ray selected blazars
- Infrared to X-ray observations of PKS 2155-304 in a low state
Cited by in corpus (8)
- Violent Intranight Optical Variability of a Radio-Loud Narrow-Line Seyfert 1 Galaxy: SDSS J094857.3+002225
- On the black hole mass of the gamma-ray emitting narrow-line Seyfert 1 galaxy 1H 0323+342
- Inner jet kinematics and the viewing angle towards the γ-ray narrow-line Seyfert 1 galaxy 1H 0323+342
- Broadband X-ray observations of four gamma-ray narrow-line Seyfert 1 galaxies
- Modelling the variable emission states of -ray emitting Narrow-Line Seyfert 1 galaxies
- Long-term Swift and Metsähovi monitoring of SDSS J164100.10+345452.7 reveals multi-wavelength correlated variability
- Hunting for the nature of the enigmatic narrow-line Seyfert 1 galaxy PKS 2004-447
- Relativistic Jets in Gamma-Ray-Emitting Narrow-Line Seyfert 1 Galaxies