Deep low-frequency observations with the Giant Metrewave Radio Telescope: a search for relic radio emission

Abstract

We present deep multifrequency observations using the Giant Metrewave Radio Telescope at 153, 244, 610 and 1260 MHz of a field centered on J0916+6348, to search for evidence of fossil radio lobes which could be due to an earlier cycle of episodic activity of the parent galaxy, as well as halos and relics in clusters of galaxies. We do not find any unambiguous evidence of episodic activity in a list of 374 sources, suggesting that such activity is rare even in relatively deep low-frequency observations. We examine the spectra of all the sources by combining our observations with those from the Westerbork Northern Sky Survey, NRAO VLA Sky Survey and the Faint Images of the Radio Sky at Twenty-centimeters survey. Considering only those which have measurements at a minimum of three different frequencies, we find that almost all sources are consistent with a straight spectrum with a median spectral index, $\alpha \sim$0.8 (S$(\nu )\propto {\nu }^{-\alpha }$), which appears steeper than theoretical expectations of the injection spectral index. We identify 14 very steep-spectrum sources with $\alpha \ge$1.3. We examine their optical fields and discuss the nature of some of these sources.

7 figures and 2 tables, accepted for publication in MNRAS

References in corpus (25)

• The Sixth Data Release of the Sloan Digital Sky Survey
• A MaxBCG Catalog of 13,823 Galaxy Clusters from the Sloan Digital Sky Survey
• Cosmological Shock Waves and Their Role in the Large Scale Structure of the Universe
• The VLA Low-frequency Sky Survey
• M87 at 90cm: A Different Picture
• The Energy Spectrum of Primary Cosmic Ray Electrons in Clusters of Galaxies and Inverse Compton Emission
• Radio galaxies with a `double-double' morphology: I - Analysis of the radio properties and evidence for interrupted activity in active galactic nuclei
• Detecting shock waves in cosmological smoothed particle hydrodynamics simulations
• GMRT Radio Halo Survey in galaxy clusters at z = 0.2 -- 0.4. II.The eBCS clusters and analysis of the complete sample
• A Sample of 669 Ultra Steep Spectrum Radio Sources to Find High Redshift Radio Galaxies
• Cosmic rays and Radio Halos in galaxy clusters : new constraints from radio observations
• Shock acceleration as origin of the radio relic in A521?
• The Northern Sky Optical Cluster Survey II: An Objective Cluster Catalog for 5800 Square Degrees
• In search of dying radio sources in the local universe
• Centaurus A: multiple outbursts or bursting bubble?
• Particle acceleration mechanisms
• A multifrequency study of giant radio sources-II. Spectral ageing analysis of the lobes of selected sources
• A multiband study of Hercules A. II. Multifrequency VLA imaging
• J0041+3224: a new double-double radio galaxy
• Spectral ageing analysis of the double-double radio galaxy J1453+3308
• Intermittent jet activity in the radio galaxy 4C29.30?
• The death of FRII radio sources and their connection with radio relics
• Introducing BAX: a database for X-ray clusters and groups of galaxies
• PKS B1545-321: Bow shocks of a relativistic jet?
• GMRT Observations of the Group Holmberg 124: Evolution by Tidal Forces and Ram Pressure ?

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• A radio study of the double-double radio galaxy 3C293
• Decoding the giant extragalactic radio sources
• The Complete Local Volume Groups Sample -- III. Characteristics of group central radio galaxies in the Local Universe
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• A multifrequency study of the large radio galaxies 3C46 and 3C452
• Low-frequency radio spectra of submillimetre galaxies in the Lockman Hole
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