Title:	Diffuse radio emission in the galaxy cluster Abell 754
Authors:	Kale, Ruta Dwarakanath, K.S.
Issue Date:	Sep-2009
Publisher:	Astronomical Society of the Pacific
Citation:	ASP Conference Series, 2009, Vol.407, p237
Abstract:	We present a low frequency (<1.4GHz) study of the diffuse radio halo and relic emission in the galaxy cluster Abell 0754. Images at 150 MHz made using the Giant Metrewave Radio Telescope (GMRT) revealed 4 diffuse features; 3 of which are new. Images at 330 and 1363 MHz were created using archival data from the GMRT and the VLA respectively. These yield synchrotron spectral indices, (S ∝ v-∝ ), steeper than 2 for the new features. Adiabatic compression of fossil radio galaxy cocoon by shocks can lead to the formation of radio relics (Ensslin & Gopal-Krishna, 2001). In the framework of this model we find that the relic in A754 can be explained as a lurking cocoon of a radio galaxy; no shock compression is required to produce this emission. The implications of this result to the merger scenario in A754 are discussed.
Description:	Restricted Access. Proceedings of the conference held 8-12 December 2008, at National Centre for Radio Astrophysics (NCRA), TIFR, Pune, India. Edited by D. J. Saikia, D. A. Green, Y. Gupta, and T. Venturi. San Francisco: Astronomical Society of the Pacific.
URI:	http://hdl.handle.net/2289/4122
Alternative Location:	http://adsabs.harvard.edu/abs/2009ASPC..407..237K
Copyright:	2009 Astronomical Society of the Pacific.
Appears in Collections:	Research Papers (A&A)

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