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dc.contributor.author | Kappes, A. | es_ES |
dc.contributor.author | Burd, P. R. | es_ES |
dc.contributor.author | Kadler, M. | es_ES |
dc.contributor.author | Ghisellini, G. | es_ES |
dc.contributor.author | Bonnassieux, E. | es_ES |
dc.contributor.author | Perucho, M. | es_ES |
dc.contributor.author | Brüggen, M. | es_ES |
dc.contributor.author | Cheung, C. C. | es_ES |
dc.contributor.author | Ciardi, B. | es_ES |
dc.contributor.author | Gallo, E. | es_ES |
dc.contributor.author | Haardt, F. | es_ES |
dc.contributor.author | Morabito, L. K. | es_ES |
dc.contributor.author | Sbarrato, T. | es_ES |
dc.contributor.author | Drabent, A. | es_ES |
dc.contributor.author | Harwood, J. | es_ES |
dc.contributor.author | Jackson, N. | es_ES |
dc.contributor.author | Moldón, Javier | es_ES |
dc.date.accessioned | 2022-12-15T12:49:09Z | - |
dc.date.available | 2022-12-15T12:49:09Z | - |
dc.date.issued | 2022-07-12 | - |
dc.identifier.citation | Astronomy & Astrophysics 663: A44 | es_ES |
dc.identifier.issn | 0004-6361 | - |
dc.identifier.other | SEV-2017-0709 | - |
dc.identifier.uri | http://hdl.handle.net/10261/284960 | - |
dc.description | This is an Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. | es_ES |
dc.description.abstract | Context. Studies of the most distant active galactic nuclei (AGNs) allow us to test our current understanding of the physics present in radio-jetted AGNs across a range of environments, and probe their interactions with these environments. The decrease in apparent luminosity with distance is the primary difficulty to overcome in the study of these distant AGNs, which requires highly sensitive instruments. Aims. Our goal is to employ new long wavelength radio data to better parametrise the broad-band spectral energy distribution (SED) of GB 1508+5714, a high-redshift (z = 4.30) AGN. Its high redshift, high intrinsic luminosity and classification as a blazar allow us to test emission models that consider the efficient cooling of jet electrons via inverse Compton losses in interactions with the dense cosmic microwave background (CMB) photon field at high redshifts. A significant detection of this effect in GB 1508+5714 may partly explain the apparent sparsity of high-redshift radio galaxies in wide-field surveys, detections of this kind are only becoming possible with the current generation of Square Kilometre Array (SKA) precursors. Methods. We used the LOw-Frequency ARray (LOFAR) to image the long wavelength radio emission around the high-redshift blazar GB 1508+5714 on arcsecond scales at frequencies between 128 and 160 MHz. This allowed us to compare the spatially resolved structure with higher frequency observations, and construct spectral index maps to study the spectral properties of the different components. Results. The LOFAR image shows a compact unresolved core and two resolved emission regions around 2 arcsec to the east and to the west of the radio core. We find structure consistent with previous Very Large Array (VLA) observations, as well as a previously unreported emission region to the east. The region in the west shows a spectral index of −1.2−0.2+0.4 while the region in the east indicates a spectral index of ≲−1.1. The radio core features aflat spectral index of 0.02 ± 0.01. Conclusions. We interpret the arcsecond-scale radio structure of GB 1508+5714 as a FR II-like radio galaxy at a small viewing angle, and the western component as the region containing the approaching jet’s terminal hot spot while the eastern diffuse component near the core can be interpreted as the counter-hot spot region. Our SED modelling shows that a scenario featuring significant quenching effects caused by interaction with the CMB provides a good description of the data, and notably explains the suppressed radio emission. © A. Kappes et al. 2022. | es_ES |
dc.description.sponsorship | P.R.B. wants to acknowledge support from the ‘DATEV-Stiftung Zukunft’ through funding the interdisciplinary data lab ‘DataSphere@JMUW’. Work by C.C.C. at the Naval Research Laboratory is supported by NASA DPR S-15633-Y. M.P. acknowledges support by the Spanish Ministry of Science through Grants PID2019-105510GB-C31, PID2019-107427GB-C33, and from the Valencian Government through grant PROMETEU/2019/071. A.D. acknowledges support by the BMBF Verbundforschung under the grant 05A20STA. J.M. acknowledges financial support from the State Agency for Research of the Spanish MCIU through the “centre of Excellence Severo Ochoa” award to the Instituto de Astrofísica de Andalucía (SEV-2017-0709) and from the grant RTI2018-096228-B-C31 (MICIU/FEDER, EU). E.B. acknowledges support from the ERC-Stg grant DRANOEL, n.714245. | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | EDP Sciences | es_ES |
dc.relation | info:eu-repo/grantAgreement/MICINN//SEV-2017-0709 | es_ES |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-105510GB-C31/ES/FUENTES DE ALTA ENERGIA CON FLUJOS A DIFERENTES ESCALAS: TEORIA Y OBSERVACIONES/ | es_ES |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-107427GB-C33/ES/GALAXIAS REALES Y VIRTUALES: SIMULACIONES/ | es_ES |
dc.relation | info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-096228-B-C31/ES/AMIGA7: GAS Y CAMPOS MAGNETICOS EN ENTORNOS EXTREMOS DE GALAXIAS CON LOS PRECURSORES DE SKA - DESDE EL DISEÑO DEL FLUJO DE DATOS HACIA SU CONSTRUCCION/ | es_ES |
dc.relation.isversionof | Publisher's version | es_ES |
dc.rights | openAccess | es_ES |
dc.subject | Galaxies: active | es_ES |
dc.subject | Galaxies: jets | es_ES |
dc.subject | Galaxies: individual: GB 1508+5714 | es_ES |
dc.subject | Radio continuum: galaxies | es_ES |
dc.subject | Techniques: high angular resolution | es_ES |
dc.subject | Techniques: interferometric | es_ES |
dc.title | Subarcsecond view on the high-redshift blazar GB 1508+5714 by the International LOFAR Telescope | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1051/0004-6361/202141720 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1051/0004-6361/202141720 | es_ES |
dc.identifier.e-issn | 1432-0746 | - |
dc.rights.license | https://creativecommons.org/licenses/by/4.0/ | es_ES |
dc.contributor.funder | Ministerio de Ciencia e Innovación (España) | es_ES |
dc.contributor.funder | European Commission | es_ES |
dc.relation.csic | Sí | es_ES |
oprm.item.hasRevision | no ko 0 false | * |
dc.identifier.funder | http://dx.doi.org/10.13039/501100004837 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100000780 | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.cerifentitytype | Publications | - |
item.languageiso639-1 | en | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
item.openairetype | artículo | - |
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