AbstractIt 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. γ-Ray observations with Fermi are strongly recommended to definitely decide on the presence or not of relativistic jets.


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    Title :

    Blazar nuclei in radio-loud narrow-line Seyfert 1?


    Contributors:
    Foschini, L. (author) / Maraschi, L. (author) / Tavecchio, F. (author) / Ghisellini, G. (author) / Gliozzi, M. (author) / Sambruna, R.M. (author)

    Published in:

    Advances in Space Research ; 43 , 6 ; 889-894


    Publication date :

    2008-12-31


    Size :

    6 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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