The infrared-dominated jet of 3C401

Show full item record

Redirect: RIT Scholars content from RIT Digital Media Library has moved from to RIT Scholar Works, please update your feeds & links!
Title: The infrared-dominated jet of 3C401
Author: Chiaberge, Marco; Sparks, William; Macchetto, Duccio; Perlman, Eric; Capetti, Alessandro; Balmaverde, Barbara; Floyd, David; O'Dea, Christopher; Axon, David
Abstract: We present a Hubble Space Telescope image of the FR II radio galaxy 3C 401, obtained at 1.6µm with the NICMOS camera in which we identify the infrared counterpart of the brightest region of the radio jet. The jet has a complex radio structure and brightens where bending occurs, most likely as a result of relativistic beaming. We analyze archival data in the radio, optical and X-ray bands and we derive its spectral energy distribution. Differently from all of the previously known optical extragalactic jets, the jet in 3C 401 is not detected in the X-rays even in a long 48ksec X-ray Chandra exposure and the infrared emission dominates the overall SED. We propose that the dominant radiation mechanism of this jet is synchrotron. The low X-ray emission is then caused by two different effects: i) the lack of any strong external photon field and ii) the shape of the electron distribution. This affects the location of the synchrotron peak in the SED, resulting in a sharp cut-off at energies lower than the X-rays. Thus 3C 401 shows a new type of jet which has intermediate spectral properties between those of FR I, which are dominated by synchrotron emission up to X-ray energies and FR II/QSO, which show a strong high-energy emission due to inverse-Compton scattering of external photons. This might be a clue for the presence of a continuous “sequence” in the properties of large scale jets, in analogy with the “blazar sequence” already proposed for sub-pc scale jets.
Description: Also archived in: arXiv:astro-ph/0505034 v2 16 May 2005
Record URI:
Date: 2005-08-10

Files in this item

Files Size Format View
DAxonArticle08-10-2005.pdf 394.3Kb PDF View/Open

The following license files are associated with this item:

This item appears in the following Collection(s)

Show full item record

Search RIT DML

Advanced Search