Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30055
DC Field | Value | Language |
---|---|---|
dc.contributor.author | SAXENA, AAYUSH | en_US |
dc.contributor.author | H. J. A. Röttgering | en_US |
dc.contributor.author | K. J. Duncan | en_US |
dc.contributor.author | G. J. Hill | en_US |
dc.contributor.author | P. N. Best | en_US |
dc.contributor.author | B. L. Indahl | en_US |
dc.contributor.author | M. Marinello | en_US |
dc.contributor.author | R. A. Overzier | en_US |
dc.contributor.author | PENTERICCI, Laura | en_US |
dc.contributor.author | PRANDONI, ISABELLA | en_US |
dc.contributor.author | H. Dannerbauer | en_US |
dc.contributor.author | R. Barrena | en_US |
dc.date.accessioned | 2021-01-27T16:47:23Z | - |
dc.date.available | 2021-01-27T16:47:23Z | - |
dc.date.issued | 2019 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30055 | - |
dc.description.abstract | We present spectra and near-infrared images of a sample of faint radio sources initially selected as promising high-redshift radio galaxy (HzRG) candidates. We have determined redshifts for a total of 13 radio galaxies with redshifts ranging from $0.52\le z \le 5.72$. Our sample probes radio luminosities that are almost an order of magnitude fainter than previous large samples at the highest redshifts. We use near-infrared photometry for a subsample of these galaxies to calculate stellar masses using simple stellar population models, and find stellar masses to be in the range $10^{10.8} - 10^{11.7} M_\odot$. We then compare our faint radio galaxies with brighter radio galaxies at $z\ge2$ from the literature. We find that fainter radio galaxies have lower Ly$\alpha$ luminosities and narrower full width at half maxima compared to the bright ones, implying photoionisation by weaker AGN. We also rule out the presence of strong shocks in faint HzRGs. The stellar masses determined for faint HzRGs are lower than what has been observed for brighter ones. We find that faint HzRG population in the redshift range $2-4$ forms a bridge between star-forming and narrow-line AGN, whereas the ones at $z>4$ are dominated by star-formation, and may be building up their stellar mass through cold accretion of gas. Finally, we show that the overall redshift evolution of radio sizes at $z>2$ is fully compatible with increased inverse Compton scattering losses at high redshifts. | en_US |
dc.language.iso | eng | en_US |
dc.title | The nature of faint radio galaxies at high redshifts | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stz2516 | en_US |
dc.identifier.scopus | 2-s2.0-85075257311 | en_US |
dc.identifier.isi | 000489302400048 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/489/4/5053/5567202 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 489 | en_US |
dc.relation.issue | 4 | en_US |
dc.relation.firstpage | 5053 | en_US |
dc.relation.lastpage | 5075 | 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 | 2019MNRAS.489.5053S | 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.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Roma | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.orcid | 0000-0001-5333-9970 | - |
crisitem.author.orcid | 0000-0001-8940-6768 | - |
crisitem.author.orcid | 0000-0001-9680-7092 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
---|---|---|---|---|
Saxena+19.pdf | pdf editoriale | 9.1 MB | Adobe PDF | View/Open |
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