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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/6190
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dc.contributor.authorHurley-Walker, N.-
dc.contributor.authorDeshpande, A.A.-
dc.contributor.authorPrabu, T.-
dc.contributor.authorUdaya Shankar, N.-
dc.contributor.authorSrivani, K.S.-
dc.contributor.authorSubrahmanyan, Ravi-
dc.contributor.author+25 Co-authors-
dc.date.accessioned2015-03-09T01:48:09Z-
dc.date.available2015-03-09T01:48:09Z-
dc.date.issued2015-03-01-
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, 2015, Vol. 447, p2468-2478en
dc.identifier.issn0035-8711-
dc.identifier.issn1365-2966 - (online)-
dc.identifier.urihttp://hdl.handle.net/2289/6190-
dc.descriptionOpen Accessen
dc.description.abstractRecent observations with the Murchison Widefield Array at 185 MHz have serendipitously unveiled a heretofore unknown giant and relatively nearby (z = 0.0178) radio galaxy associated with NGC 1534. The diffuse emission presented here is the first indication that NGC 1534 is one of a rare class of objects (along with NGC 5128 and NGC 612) in which a galaxy with a prominent dust lane hosts radio emission on scales of ∼700 kpc. We present details of the radio emission along with a detailed comparison with other radio galaxies with discs. NGC 1534 is the lowest surface brightness radio galaxy known with an estimated scaled 1.4-GHz surface brightness of just 0.2 mJy arcmin−2. The radio lobes have one of the steepest spectral indices yet observed: α = −2.1 ± 0.1, and the core to lobe luminosity ratio is <0.1 per cent. We estimate the space density of this low brightness (dying) phase of radio galaxy evolution as 7 × 10−7 Mpc−3 and argue that normal AGN cannot spend more than 6 per cent of their lifetime in this phase if they all go through the same cycle.en
dc.language.isoenen
dc.publisherOxford University Press for The Royal Astronomical Societyen
dc.relation.urihttp://adsabs.harvard.edu/abs/2015MNRAS.447.2468Hen
dc.relation.urihttp://arxiv.org/abs/1412.3856en
dc.relation.urihttp://dx.doi.org/10.1093/mnras/stu2570en
dc.rights2015 The authors & the Royal Astronomical Societyen
dc.subjecttechniques interferometricen
dc.subjectRadio continuumen
dc.titleSerendipitous discovery of a dying giant radio galaxy associated with NGC 1534, using the Murchison Widefield arrayen
dc.typeArticleen
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