Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/27599
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wilber, A. | en_US |
dc.contributor.author | Brüggen, M. | en_US |
dc.contributor.author | Bonafede, A. | en_US |
dc.contributor.author | Savini, F. | en_US |
dc.contributor.author | Shimwell, T. | en_US |
dc.contributor.author | van Weeren, R. J. | en_US |
dc.contributor.author | Rafferty, D. | en_US |
dc.contributor.author | Mechev, A. P. | en_US |
dc.contributor.author | Intema, H. | en_US |
dc.contributor.author | Andrade-Santos, F. | en_US |
dc.contributor.author | Clarke, A. O. | en_US |
dc.contributor.author | Mahony, E. K. | en_US |
dc.contributor.author | Morganti, R. | en_US |
dc.contributor.author | PRANDONI, ISABELLA | en_US |
dc.contributor.author | BRUNETTI, GIANFRANCO | en_US |
dc.contributor.author | Röttgering, H. | en_US |
dc.contributor.author | Mandal, S. | en_US |
dc.contributor.author | de Gasperin, F. | en_US |
dc.contributor.author | Hoeft, M. | en_US |
dc.date.accessioned | 2020-10-06T06:50:34Z | - |
dc.date.available | 2020-10-06T06:50:34Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27599 | - |
dc.description.abstract | Low-Frequency Array (LOFAR) observations at 144 MHz have revealed large-scale radio sources in the unrelaxed galaxy cluster Abell 1132. The cluster hosts diffuse radio emission on scales of ∼650 kpc near the cluster centre and a head-tail (HT) radio galaxy, extending up to 1 Mpc, south of the cluster centre. The central diffuse radio emission is not seen in NRAO VLA FIRST Survey, Westerbork Northern Sky Survey, nor in C & D array VLA observations at 1.4 GHz, but is detected in our follow-up Giant Meterwave Radio Telescope (GMRT) observations at 325 MHz. Using LOFAR and GMRT data, we determine the spectral index of the central diffuse emission to be α = -1.75 ± 0.19 (S ∝ ν<SUP>α</SUP>). We classify this emission as an ultra-steep spectrum radio halo and discuss the possible implications for the physical origin of radio haloes. The HT radio galaxy shows narrow, collimated emission extending up to 1 Mpc and another 300 kpc of more diffuse, disturbed emission, giving a full projected linear size of 1.3 Mpc - classifying it as a giant radio galaxy (GRG) and making it the longest HT found to date. The head of the GRG coincides with an elliptical galaxy (SDSS J105851.01+564308.5) belonging to Abell 1132. In our LOFAR image, there appears to be a connection between the radio halo and the GRG. The turbulence that may have produced the halo may have also affected the tail of the GRG. In turn, the GRG may have provided seed electrons for the radio halo. | en_US |
dc.language.iso | eng | en_US |
dc.title | LOFAR discovery of an ultra-steep radio halo and giant head-tail radio galaxy in Abell 1132 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx2568 | en_US |
dc.identifier.scopus | 2-s2.0-85046083689 | en_US |
dc.identifier.isi | 000423809400051 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article-abstract/473/3/3536/4331646 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 473 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3536 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.473.3536W | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.orcid | 0000-0001-9680-7092 | - |
crisitem.author.orcid | 0000-0003-4195-8613 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Wilber+2018.pdf | PDF editoriale | 6.4 MB | Adobe PDF | View/Open |
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