Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/27633
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | SAXENA, AAYUSH | en_US |
dc.contributor.author | Marinello, M. | en_US |
dc.contributor.author | Overzier, R. A. | en_US |
dc.contributor.author | Best, P. N. | en_US |
dc.contributor.author | Röttgering, H. J. A. | en_US |
dc.contributor.author | Duncan, K. J. | en_US |
dc.contributor.author | PRANDONI, ISABELLA | en_US |
dc.contributor.author | PENTERICCI, Laura | en_US |
dc.contributor.author | MAGLIOCCHETTI, MANUELA | en_US |
dc.contributor.author | PARIS, Diego | en_US |
dc.contributor.author | CUSANO, FELICE | en_US |
dc.contributor.author | MARCHI, FRANCESCA | en_US |
dc.contributor.author | Intema, H. T. | en_US |
dc.contributor.author | Miley, GK | en_US |
dc.date.accessioned | 2020-10-06T11:17:47Z | - |
dc.date.available | 2020-10-06T11:17:47Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27633 | - |
dc.description.abstract | We report the discovery of the most distant radio galaxy to date, TGSS J1530+1049 at a redshift of z = 5.72, close to the presumed end of the Epoch of Reionization. The radio galaxy was selected from the TGSS ADR1 survey at 150 MHz for having an ultra-steep spectral index, α ^{{150 MHz}}_{{1.4 GHz}} = -1.4 and a compact morphology obtained using VLA imaging at 1.4 GHz. No optical or infrared counterparts for the radio source were found in publicly available sky surveys. Follow-up optical spectroscopy at the radio position using GMOS on Gemini North revealed the presence of a single emission line. We identify this line as Lyman alpha at z = 5.72, because of its asymmetric line profile, the absence of other optical/UV lines in the spectrum, and a high equivalent width. With an Lyα luminosity of 5.7 × 10<SUP>42</SUP> erg s<SUP>-1</SUP> and an FWHM of 370 km s<SUP>-1</SUP>, TGSS J1530+1049 is comparable to `non-radio' Lyman alpha emitters (LAEs) at a similar redshift. However, with a radio luminosity of log L<SUB>150MHz</SUB> = 29.1 W Hz<SUP>-1</SUP> and a deconvolved physical size 3.5 kpc, its radio properties are similar to other known radio galaxies at z > 4. Subsequent J and K band imaging using LUCI on the Large Binocular Telescope resulted in non-detection of the host galaxy down to 3σ limits of J > 24.4 and K > 22.4 (Vega). The K band limit is consistent with z > 5 from the K - z relation for radio galaxies and helps rule out low redshifts. The stellar mass limit derived using simple stellar population models is M<SUB>stars</SUB> < 10<SUP>10.5</SUP> M<SUB>☉</SUB>. Its relatively low stellar mass and small radio and Lyα sizes suggest that TGSS J1530+1049 may be a radio galaxy in an early phase of its evolution. | en_US |
dc.language.iso | eng | en_US |
dc.title | Discovery of a radio galaxy at z = 5.72 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/sty1996 | en_US |
dc.identifier.scopus | 2-s2.0-85054747545 | en_US |
dc.identifier.isi | 000449614800101 | en_US |
dc.identifier.url | http://arxiv.org/abs/1806.01191v2 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/480/2/2733/5067277 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 480 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 2733 | en_US |
dc.relation.lastpage | 2742 | 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.480.2733S | 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 | O.A. Roma | - |
crisitem.author.dept | IAPS Roma | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0001-5333-9970 | - |
crisitem.author.orcid | 0000-0001-9680-7092 | - |
crisitem.author.orcid | 0000-0001-8940-6768 | - |
crisitem.author.orcid | 0000-0001-9158-4838 | - |
crisitem.author.orcid | 0000-0002-7409-8114 | - |
crisitem.author.orcid | 0000-0003-2910-6565 | - |
crisitem.author.orcid | 0000-0002-5694-2545 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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