Spatially resolved studies of extragalactic jets in high redshift radio galaxies
Abstract
The correlation between radio spectral steepness and redshift has been successfully used to find high redshift (z >= 2) radio galaxies, but the origin of this relation is unknown. The ultra-steep spectra of high-z radio sources make them ideally suited for studies with the Low Band Antenna of the new Low Frequency Array, which covers 10-80 MHz and has baselines up to about 1300 km. As part of an ongoing survey, we use the longest baselines to map the low-frequency (< 70 MHz) spatial distributions along the jets of 5 bright extended steep spectrum high-z radio sources. From this, we will determine whether the spectra change over these spatially resolved sources, thereby constraining particle acceleration processes. We present early results from our low-frequency survey of ultra-steep spectrum radio galaxies. The first low frequency long baseline images of these objects are presented.
- Publication:
-
Extragalactic Jets from Every Angle
- Pub Date:
- March 2015
- DOI:
- 10.1017/S1743921315002239
- Bibcode:
- 2015IAUS..313..231M
- Keywords:
-
- galaxies: high-redshift;
- galaxies: jets