Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-05-19
Astronomy and Astrophysics
Astrophysics
16 pages, 4 figures. To appear in the Astronomical Journal. Submitted: March 11, 2008. Accepted: May 19, 2008
Scientific paper
We present 8.4 GHz VLA A-array and 1.4 GHz VLBA results on the radio continuum emission from the highest redshift radio-loud quasar known to date, the $z=6.12$ QSO J1427+3312. The VLA observations show an unresolved steep spectrum source with a flux density of $250 \pm 20$ uJy at 8.4GHz and a spectral index value of $\alpha^{8.4}_{1.4}=-1.1$. The 1.4 GHz VLBA images reveal several continuum components with a total flux density of $1.778 \pm 0.109$ mJy, which is consistent with the flux density measured with the VLA at 1.4 GHz. Each of these components is resolved with sizes of a few milliarcseconds, and intrinsic brightness temperatures on the order of $10^7$ to $10^8$ K. The physical characteristics as revealed in these observations suggest that this QSO may be a Compact Symmetric Object, with the two dominant components seen with the VLBA, which are separated by 31 mas (174 pc) and have intrinsic sizes of ~22-34 pc, being the two radio lobes that are confined by the dense ISM. If indeed a CSO, then the estimated kinematic age of this radio AGN is only $10^3$ yr.
Carilli Chris L.
McGreer Ian D.
Momjian Emmanuel
No associations
LandOfFree
VLA and VLBA Observations of the Highest Redshift Radio-Loud QSO J1427+3312 at z = 6.12 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 VLA and VLBA Observations of the Highest Redshift Radio-Loud QSO J1427+3312 at z = 6.12, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and VLA and VLBA Observations of the Highest Redshift Radio-Loud QSO J1427+3312 at z = 6.12 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-648425