Bulk motion of ultrarelativistic conical blazar jets

Gopal-Krishna, ; Wiita, Paul J. ; Dhurde, Samir (2006) Bulk motion of ultrarelativistic conical blazar jets Monthly Notices of the Royal Astronomical Society, 369 (3). pp. 1287-1292. ISSN 0035-8711

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Official URL: http://onlinelibrary.wiley.com/doi/10.1111/j.1365-...

Related URL: http://dx.doi.org/2006-07


Allowing for the conical shape of ultrarelativistic blazar jets with opening angles of a few degrees on parsec-scales, we show that their bulk Lorentz factors and viewing angles can be much larger than the values usually inferred by combining their flux-variability and proper-motion measurements. This is in accord with our earlier finding that such ultrarelativistic (Lorentz factor, Γ > 30) conical jets can reconcile the relatively slow apparent motions of Very Long Baseline Interferometry (VLBI) knots in TeV blazars with the extremely fast flows implied by their rapid γ-ray variability. This jet geometry also implies that de-projected jet opening angles will typically be significantly underestimated from VLBI measurements. In addition, de-projected jet lengths will be considerably overestimated if high Lorentz factors and significant opening angles are not taken into account.

Item Type:Article
Source:Copyright of this article belongs to John Wiley and Sons.
Keywords:Galaxies: Active; Galaxies: Jets; Galaxies: Nuclei; Quasars: General; Radio Continuum: Galaxies
ID Code:76574
Deposited On:04 Jan 2012 06:19
Last Modified:09 Jan 2012 04:19

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