Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-06-12
Astrophys.J.650:679-692,2006
Astronomy and Astrophysics
Astrophysics
ApJ, accepted. No changes from version 1. 17 pages emulateapj style, 7 figures
Scientific paper
10.1086/506908
A newly identified kiloparsec-scale X-ray jet in the high-redshift z=3.89 quasar 1745+624 is studied with multi-frequency Very Large Array, Hubble Space Telescope, and Chandra X-ray imaging data. This is only the third large-scale X-ray jet beyond z>3 known and is further distinguished as being the most luminous relativistic jet observed at any redshift, exceeding 10^45 erg/s in both the radio and X-ray bands. Apart from the jet's extreme redshift, luminosity, and high inferred equipartition magnetic field (in comparison to local analogues), its basic properties such as X-ray/radio morphology and radio polarization are similar to lower-redshift examples. Its resolved linear structure and the convex broad-band spectral energy distributions of three distinct knots are also a common feature among known powerful X-ray jets at lower-redshift. Relativistically beamed inverse Compton and `non-standard' synchrotron models have been considered to account for such excess X-ray emission in other jets; both models are applicable to this high-redshift example but with differing requirements for the underlying jet physical properties, such as velocity, energetics, and electron acceleration processes. One potentially very important distinguishing characteristic between the two models is their strongly diverging predictions for the X-ray/radio emission with increasing redshift. This is considered, though with the limited sample of three z>3 jets it is apparent that future studies targeted at very high-redshift jets are required for further elucidation of this issue. Finally, from the broad-band jet emission we estimate the jet kinetic power to be no less than 10^46 erg/s, which is about 10% of the Eddington luminosity corresponding to this galaxy's central [abridged]
Cheung Charlotte
Siemiginowska Aneta
Stawarz Lucasz
No associations
LandOfFree
Confronting X-ray Emission Models with the Highest-Redshift Kiloparsec-scale Jets: the z=3.89 Jet in Quasar 1745+624 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Confronting X-ray Emission Models with the Highest-Redshift Kiloparsec-scale Jets: the z=3.89 Jet in Quasar 1745+624, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Confronting X-ray Emission Models with the Highest-Redshift Kiloparsec-scale Jets: the z=3.89 Jet in Quasar 1745+624 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-647432