English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We determine the nuclear spectral energy distribution (SED) from the radio tothe gamma-ray band for the FR I radio galaxy NGC6251, by using both data fromthe literature and analyzing HST and X-ray archival data. In the Log nu - Lognu F(nu) representation, the SED has two broad peaks, and it is remarkablysimilar to those of blazars. We show that the low-energy peak can be explainedin terms of synchrotron radiation, while the high energy peak is most plausiblyproduced by inverse Compton scattering. This brings direct support to the FRI-BL Lacs unification model. We model the overall emission in the frame of asynchrotron self-Compton scenario, which well describes the SED of BL Lacs. Themodel parameters we obtain confirm also quantitatively the FR I-BL Lacunification model and imply a rather small viewing angle to this source (theta<~ 20deg). NGC6251 is the second radio galaxy, in addition to Centaurus A, forwhich a similar analysis has been performed. A significant improvement withrespect to the case of Cen A is the absence of obscuration in NGC6251, whichstrengthens the overall result.Comment: 14 pages, 6 figures, accepted for publication in the Ap

The Nuclear Spectral Energy Distribution of NGC 6251: A BL Lacertae Object in the Center of an FR I Radio Galaxy