Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-01-16
Astronomy and Astrophysics
Astrophysics
18 pages, Accepted by ApJ
Scientific paper
10.1086/374212
We have calculated inverse-Compton Doppler factors for 3C 279 using the collection of VLBI data recently published by us, and the collection of multiwavelength spectra recently published by Hartman et al. From the Doppler factor and superluminal apparent speed, we then calculate the Lorentz factor and angle to the line-of-sight of the parsec-scale relativistic jet. We model the jet components as homogeneous spheres and the VLBI core as an unresolved inhomogeneous conical jet. The conical-jet model can be made to match both the observed X-ray emission and the VLBI properties of the core with a suitable choice of Doppler factor, implying the core makes a significant contribution to the X-ray emission. The parameters of the conical models indicate the jet is particle dominated at the radii that produce significant emission, and is not in equipartition. At the inner radius of the conical jet the magnetic field is of order 0.1 G and the relativistic-particle number density is of order 10 cm^{-3}. When all components are included in the calculation, then on average the core produces about half of the X-rays, with the other half being split between the long-lived component C4 and the brightest inner-jet component. We calculate an average speed and angle to the line-of-sight for the region of the jet interior to 1 mas of v=0.992c (gamma=8) and 4 degrees, and an average speed and angle to the line-of-sight for C4 (at a distance from the core of 3 mas) of v=0.997c (gamma=13) and 2 degrees. These values imply average Doppler factors of delta=12 for the inner jet, and delta=21 for C4.
Gilmore Diane M.
Piner Brian Glenn
Unwin Stephen C.
Urry Claudia Megan
Wehrle Ann E.
No associations
LandOfFree
The Speed and Orientation of the Parsec-Scale Jet in 3C 279 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 The Speed and Orientation of the Parsec-Scale Jet in 3C 279, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Speed and Orientation of the Parsec-Scale Jet in 3C 279 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-534830