Blazar nuclei in radio-loud narrow-line Seyfert 1? |
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| Authors: | L Foschini L Maraschi F Tavecchio G Ghisellini M Gliozzi RM Sambruna |
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| Institution: | 1. INAF/IASF-Bologna, Via Gobetti 101, 40129 Bologna, Italy;2. INAF/Osservatorio Astronomico di Brera, Via Brera 28, 20121 Milano, Italy;3. George Mason University, 4400 University Drive, Fairfax, VA 22030, USA;4. NASA/Goddard Space Flight Center, Code 661, Greenbelt, MD 20771, USA |
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| 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. γ-Ray observations with Fermi are strongly recommended to definitely decide on the presence or not of relativistic jets. |
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| Keywords: | Radio-loud narrow-line Seyfert 1 Blazars Relativistic jets |
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