Spectral and morphological signatures of cluster merger shocks: CIZA J2242.8+5301

Stroe, Andra; Weeren, Reinout J van; Sobral, David; Rumsey, Clare; Intema, Huib; Röttgering, Huub JA; Harwood, Jeremy J; Saunders, Richard; Brüggen, Marcus; Hoeft, Matthias

Access Status

Open access via publisher

Authors

Stroe, Andra

Weeren, Reinout J van

Sobral, David

Rumsey, Clare

Intema, Huib

Röttgering, Huub JA

Harwood, Jeremy J

Saunders, Richard

Brüggen, Marcus

Hoeft, Matthias

Type

Journal Article

Metadata

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Citation

Stroe, A. and Weeren, R.J.V. and Sobral, D. and Rumsey, C. and Intema, H.T. and Röttgering, H.J.A. and Harwood, J.J. et al. 2014. Spectral and morphological signatures of cluster merger shocks: CIZA J2242.8+5301. Astronomical Society of India Conference Series. BASI. 13 (1): pp. 201-204.

Additional URLs

https://astron-soc.in/bulletin/asics_vol013/

Faculty

Faculty of Science and Engineering

School

School of Electrical Engineering, Computing and Mathematical Sciences (EECMS)

URI

http://hdl.handle.net/20.500.11937/76025

Collection

Curtin Research Publications

Abstract

The CIZA J2242.8+5301 cluster hosts an extraordinary, narrow, Mpc-wide, diffuse patch of radio emission tracing travelling shock waves, called a relic. We perform a multi-wavelength of observations of the cluster. We discover radio spectral steepening and increasing spectral curvature in the shock downstream area, indicative of emission produced by spectrally-aged electrons, following a JP ageing model. The curved integrated spectrum towards $16$ GHz challenges the favoured relic formation model. Further, we find a boosting the number density of H$\alpha$ emitters by a factor of $10$, possibly caused by interactions of the galaxies with the shock wave.