VLBA Observations Of The Highest Redshift Radio-loud QSO Known-to-date J1427+3312 At Z = 6.12

Details VLBA Observations Of The Highest Redshift Radio-loud QSO Known-to-date J1427+3312 At Z = 6.12 VLBA Observations Of The Highest Redshift Radio-loud QSO Known-to-date J1427+3312 At Z = 6.12

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.4524m&link_type=abstract

American Astronomical Society, AAS Meeting #211, #45.24; Bulletin of the American Astronomical Society, Vol. 39, p.800

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present phase-referenced VLBI results on the radio continuum emission from the highest redshift radio-loud quasar known-to-date, the z=6.12 QSO FIRST J1427385+331241. The observations were carried out at 1.4 GHz using the Very Long Baseline Array (VLBA) of NRAO using its maximum recording rate (512 Mbps). The results reveal four continuum structures with flux densities > 5σ (140 μJy/beam) within an area of 0.12 arcsec. The total flux density of the detected components is comparable to the unresolved radio source seen with the VLA at a much lower angular resolution. The continuum components revealed in the VLBA image of this quasar have sizes of a few milliarseconds, and intrinsic brightness temperatures on the order of 107 K. Here we discuss whether the continuum components seen with the VLBA are due to gravitational lensing, or if they represent core-jet structures in this z=6.12 radio-loud quasar.
The National Radio Astronomy Observatory is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

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