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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6406
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dc.contributor.authorPandey-Pommier, M.-
dc.contributor.authorWeeren, R.R.Van.-
dc.contributor.authorOgrean, G.A.-
dc.contributor.authorDwarakanath, K.S.-
dc.contributor.author+11 Co-authors-
dc.date.accessioned2016-09-27T11:05:38Z-
dc.date.available2016-09-27T11:05:38Z-
dc.date.issued2015-12-
dc.identifier.citationProceedings of the Annual meeting of the French Society of Astronomy and Astrophysics.Edited by F. Martins et al ,held at Toulouse, France from 2-5th June 2015, page 247-252en_US
dc.identifier.urihttp://hdl.handle.net/2289/6406-
dc.descriptionOpen Accessen_US
dc.description.abstractSteep Spectrum Radio Halos (RH) are very rare diffuse structures existing in the central region of merging galaxy clusters. Due to their steep spectral nature, they are often not detected at higher frequencies and tend to shine only at very low frequencies. They represent a new class of objects that could be either old halos or clusters at a special time of the merger event, when particle acceleration processes have a lower efficiency. The comparison of theoretical predictions with the low frequency observations clearly suggests that there is yet a large population of very faint RHs in galaxy clusters that still remains to be discovered with steep spectrum RHs expected to dominate this undiscovered population. As the number counts of these steep spectrum RHs is scarce, discovery of even a couple of them is important. We present result on cluster MACSJ0416.1-2403 (z = 0.396), that host one such steep spectrum RH and emphasize the important contribution of low frequency observations with interferometers like GMRT, MWA, LOFAR, SKA on cluster science and discovery of new population of rare steep spectrum RHs.en_US
dc.language.isoenen_US
dc.publisherSociété Française d’Astronomie et d’Astrophysique (SF2A),en_US
dc.relation.urihttp://adsabs.harvard.edu/abs/2015sf2a.conf..247Pen_US
dc.relation.urihttp://sf2a.eu/proceedings/2015/2015sf2a.conf..0247P.pdfen_US
dc.rights2015 Société Française d’Astronomie et d’Astrophysique (SF2A),en_US
dc.subjectMACSJ0416.1-2403en_US
dc.titleA Steep spectrum radio halo in merging galaxy cluster- MACSJ0416.1-2403en_US
dc.typeArticleen_US
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