Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/28075
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Vernstrom, T. | en_US |
dc.contributor.author | Gaensler, B. M. | en_US |
dc.contributor.author | VACCA, VALENTINA | en_US |
dc.contributor.author | Farnes, J. S. | en_US |
dc.contributor.author | Haverkorn, M. | en_US |
dc.contributor.author | O'Sullivan, S. P. | en_US |
dc.date.accessioned | 2020-10-29T10:12:45Z | - |
dc.date.available | 2020-10-29T10:12:45Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/28075 | - |
dc.description.abstract | We present the largest ever sample of radio polarization properties for z > 4 sources, with 14 sources having significant polarization detections. Using wide-band data from the Karl G. Jansky Very Large Array, we obtained the rest-frame total intensity and polarization properties of 37 radio sources, nine of which have spectroscopic redshifts in the range 1 ≤ z ≤ 1.4, with the other 28 having spectroscopic redshifts in the range 3.5 ≤ z ≤ 6.21. Fits are performed for the Stokes I and fractional polarization spectra, and Faraday rotation measures are derived using rotation measure synthesis and QU fitting. Using archival data of 476 polarized sources, we compare high-redshift (z > 3) source properties to a 15 GHz rest-frame luminosity matched sample of low-redshift (z < 3) sources to investigate if the polarization properties of radio sources at high redshifts are intrinsically different than those at low redshift. We find a mean of the rotation measure absolute values, corrected for Galactic rotation, of 50 ± 22 rad m<SUP>-2</SUP> for z > 3 sources and 57 ± 4 rad m<SUP>-2</SUP> for z < 3. Although there is some indication of lower intrinsic rotation measures at high-z possibly due to higher depolarization from the high-density environments, using several statistical tests we detect no significant difference between low- and high-redshift sources. Larger samples are necessary to determine any true physical difference. | en_US |
dc.language.iso | eng | en_US |
dc.title | Radio polarization properties of quasars and active galaxies at high redshifts | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx3191 | en_US |
dc.identifier.scopus | 2-s2.0-85045908464 | en_US |
dc.identifier.isi | 000427345900021 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/475/2/1736/4725060 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 475 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 1736 | en_US |
dc.type.referee | REF_1 | 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.475.1736V | 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.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0003-1997-0771 | - |
È visualizzato nelle collezioni: | 1.01 Articoli in rivista |
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stx3191.pdf | Pdf editoriale | 2.29 MB | Adobe PDF | Visualizza/apri |
1712.01909.pdf | 4.53 MB | Adobe PDF | Visualizza/apri |
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