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http://hdl.handle.net/2289/4122
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) |
Files in This Item:
File | Description | Size | Format | |
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2009_ASPCS_407_237.pdf Restricted Access | Restricted access | 454.91 kB | Adobe PDF | View/Open Request a copy |
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