Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530

Details Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530 Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530

1998-09-16

arxiv.org/abs/astro-ph/9809220v1

Astronomy and Astrophysics

Astrophysics

12 pages, 2 figures. Accepted for publication in ApJ Letters

Scientific paper

10.1086/311701

We present here space-based VLBI observations with VSOP and a southern hemisphere ground array of the gamma-ray blazar NRAO 530 at 1.6 GHz and 5 GHz. The brightness temperature of the core at 1.6 GHz is $5 \times 10^{11}$ K. The size is near the minimum observable value in the direction of NRAO~530 due to interstellar scattering. The 5 GHz data show a single component with a brightness temperature of $\sim 3 \times 10^{12}$ K, significantly in excess of the inverse Compton limit and of the equipartition brightness temperature limit (Readhead 1994). This is strong evidence for relativistic motion in a jet requiring model-dependent Doppler boosting factors in the range 6 to 60. We show that a simple homogeneous sphere probably does not model the emission region accurately. We favor instead an inhomogeneous jet model with a Doppler boosting factor of 15.

Affiliated with

Also associated with

No associations

Rating

Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530 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 Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Space VLBI Observations Show $T_b > 10^{12} K$ in the Quasar NRAO 530 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-536246