Bibcode
DOI
Tavecchio, F.; Maraschi, L.; Sambruna, R. M.; Urry, C. M.; Cheung, C. C.; Gambill, J. K.; Scarpa, R.
Bibliographical reference
The Astrophysical Journal, Volume 614, Issue 1, pp. 64-68.
Advertised on:
10
2004
Journal
Citations
38
Refereed citations
33
Description
The Chandra discovery of bright X-ray emission from kiloparsec-scale
jets allows insight into the physical parameters of the jet flow at
large scales. At the opposite extreme, extensive studies of the inner
relativistic jets in blazars with multiwavelength observations yield
comparable information on subparsec scales. In the framework of simple
radiation models for the emission regions we compare the physical
parameters of jets on these two very different scales in the only two
well-studied blazars for which large-scale emission has been resolved by
Chandra. Notably, we find that the relativistic Doppler factors and
powers derived independently at the two scales are consistent,
suggesting that the jet does not suffer severe deceleration or
dissipation. Moreover, the internal equipartition pressures in the inner
jet and in the external X-ray-bright knots scale inversely with the jet
cross section as expected in the simple picture of a freely expanding
jet in equipartition.