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Using radio jets of PKS J0334-3900 to probe the intra-cluster medium in A3135

Published online by Cambridge University Press:  24 March 2015

L. Pratley
Affiliation:
School of Chemical & Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand email: [email protected]
M. Johnston-Hollitt
Affiliation:
School of Chemical & Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand email: [email protected]
S. Dehghan
Affiliation:
School of Chemical & Physical Sciences, Victoria University of Wellington, PO Box 600, Wellington 6140, New Zealand email: [email protected]
M. Sun
Affiliation:
Eureka Scientific, Inc., 2452 Delmer Street, Suite 100, Oakland, CA 94602, USA
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Abstract

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We present a multi-wavelength study of the radio galaxy PKS J0334-3900, which resides at the centre of Abell 3135. Using Australia Telescope Compact Array (ATCA) observations at 1.4, 2.5, 4.6 & 8.6 GHz, we performed a detailed analysis of PKS J0334-3900. The morphology and spectral indices give physical parameters that constrain the dynamical history of the galaxy, which we use to produce a simulation of PKS J0334-3900. This simulation shows that the morphology can be generated by a wind in the intracluster medium (ICM), orbital motion caused by a companion galaxy, and precession of the black hole (BH).

Additionally, ATCA polarisation data was used to obtain rotation measure values along the line of sight to PKS J0334-3900. Using our simulation we are able to infer the distance between the jets along the line of sight to be 154 ± 16 kpc, which when combined with the difference in rotation measure between the jets provides a novel new way to estimate the average magnetic field within the cluster. A lower limit to the cluster magnetic field was calculated to be 0.09±0.03 μG. We have shown that different techniques can be applied to observations of jets in galaxies to infer information on cluster environments.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

Pratley, L., Johnston-Hollitt, M., Dehghan, S., & Sun, M. 2013, MNRAS, 432, 243CrossRefGoogle Scholar