![]() Our results demonstrate that remnant radio galaxies can show a wide range of evolutionary paths and spectral properties. The spectral shape of this remnant radio galaxy differs from most of the previously identified remnant sources, which show steep or curved spectra at low to intermediate frequencies. This interaction may have played a role in the triggering and/or shut-down of the radio jets.Ĭonclusions. The host galaxy is currently interacting with another galaxy located at a projected separation of 15 kpc and a radial velocity offset of ~ 300 km s -1. We find that the source has remained visible in the remnant phase for about 60 Myr, significantly longer than its active phase of 15 Myr, despite being located outside a cluster. From our ageing and morphological analysis it is clear that the nuclear engine is currently switched off or, at most, active at a very low power state. The source has a relatively smooth, diffuse, amorphous appearance together with a very weak central compact core that is associated with the host galaxy located at z = 0.051. By modelling the radio spectrum, we probed characteristic timescales of the radio activity. By combining LOFAR data with new follow-up Westerbork observations and archival data at higher frequencies, we investigated the source morphology and spectral properties from 116 to 4850 MHz. Here we present the discovery and detailed analysis of a large (700 kpc) remnant radio galaxy with a low surface brightness that has been identified in LOFAR images at 150 MHz. As a result of their rarity and because they are difficult to identify, this dying phase remains poorly understood and the luminosity evolution is largely unconstrained.Īims. ![]() Remnants are rare in flux-limited samples, comprising at most a few percent. Remnant radio galaxies represent the final dying phase of radio galaxy evolution in which the jets are no longer active. Poggio dei Pini, Strada 54, 09012 Capoterra (CA), ItalyĤ Department of Astrophysics/IMAPP, Radboud University, PO Box 9010, 6500 GL Nijmegen, The Netherlandsĥ SUPA, Institute for Astronomy, Royal Observatory, Blackford Hill, Edinburgh, EH9 3HJ, UKĦ Hamburger Sternwarte, University of Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germanyħ Obserwatorium Astronomiczne, Uniwersytet Jagielloński, ul Orla 171, 30-244, Kraków, PolandĨ Astrophysics, University of Oxford, Keble Road, Oxford, OX1 3RH, UKĩ Leiden Observatory, Leiden University, Niels BohrCA Leiden, The NetherlandsĬontext. Röttgering 9ġ ASTRON, the Netherlands Institute for Radio Astronomy, PostAA Dwingeloo, The NetherlandsĮ-mail: Kapteyn Astronomical Institute, Rijksuniversiteit Groningen, LandleAD Groningen, The Netherlandsģ INAF–Osservatorio Astronomico di Cagliari, Loc. Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences Punctuation and style concerns regarding equations, figures, tables, and footnotes
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