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Spatially resolved studies of extragalactic jets in high redshift radio galaxies

Published online by Cambridge University Press:  24 March 2015

Leah K. Morabito ,
Adam Deller ,
J. B. R. Oonk ,
Huub Röttgering  and
George Miley
Leah K. Morabito
Affiliation:
Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: morabito@strw.leidenuniv.nl
Adam Deller
Affiliation:
Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands
J. B. R. Oonk
Affiliation:
Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: morabito@strw.leidenuniv.nl Netherlands Institute for Radio Astronomy (ASTRON), Postbus 2, 7990 AA Dwingeloo, The Netherlands
Huub Röttgering
Affiliation:
Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: morabito@strw.leidenuniv.nl
George Miley
Affiliation:
Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands email: morabito@strw.leidenuniv.nl
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Abstract

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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.

Keywords

galaxies: high-redshiftgalaxies: jets
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S313: Extragalactic jets from every angle , September 2014 , pp. 231 - 235
Copyright
Copyright © International Astronomical Union 2015 

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