A LOFAR view on the duty cycle of young radio sources

Abstract

Compact Steep Spectrum, Gigahertz Peaked Spectrum and High Frequency Peak (CSS, GPS, HFP) sources are considered to be young radio sources but the details of their duty cycle are not well understood. In some cases they are thought to develop in large radio galaxies, while in other cases their jets may experience intermittent activity or die prematurely and remain confined within the host galaxy. By studying in a systematic way the presence and the properties of any extended emission surrounding these compact sources we can provide firmer constraints on their evolutionary history and on the timescales of activity of the radio source. Remnant emission from previous outbursts is supposed to have very low surface brightness and to be brighter at low frequency. Taking advantage of the unprecedented sensitivity and resolution provided by the Low Frequency Array (LOFAR) we have started a systematic search of new CSS, GPS and HFP sources with extended emission, as well as a more detailed study of some well-known of these sources. Here we present the key points of our search in the LOFAR fields and a more in-depth analysis on the source B2 0258+35, a CSS source surrounded by a pair of large, diffuse radio lobes.

5 pages, 2 figures, in press for Astronomische Nachrichten. Contribution to the Proceedings of the "Fifth Workshop on Compact Steep Spectrum and GHz-Peaked Spectrum Radio Sources", held in Rimini (Italy) in May 2015

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Cited by in corpus (8)

• The Complete Local Volume Groups Sample - I. Sample Selection and X-ray Properties of the High-Richness Subsample
• A LOFAR study of non-merging massive galaxy clusters
• The origin of the X-ray, radio and HI structures in the NGC 5903 galaxy group
• Studying the late evolution of a radio-loud AGN in a galaxy group with LOFAR
• Polarised structures in the radio lobes of B2 0258+35 - Evidence of magnetic draping?
• Search and characterization of remnant radio galaxies in the XMM$-$LSS deep field
• Remnant radio galaxy candidates of small angular sizes
• Characteristics of remnant radio galaxies detected in the deep radio continuum observations from the SKA pathfinders