Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/28075
DC Field | Value | Language |
---|---|---|
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 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
stx3191.pdf | Pdf editoriale | 2.29 MB | Adobe PDF | View/Open |
1712.01909.pdf | 4.53 MB | Adobe PDF | View/Open |
Page view(s)
34
checked on Aug 5, 2024
Download(s)
20
checked on Aug 5, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.