dc.contributor.author | Slob, M. M. | |
dc.contributor.author | Callingham, J. R. | |
dc.contributor.author | Röttgering, H. J. A. | |
dc.contributor.author | Williams, W. L. | |
dc.contributor.author | Duncan, K. J. | |
dc.contributor.author | Gasperin, F. de | |
dc.contributor.author | Hardcastle, M. J. | |
dc.contributor.author | Miley, G. K. | |
dc.date.accessioned | 2023-04-11T13:30:03Z | |
dc.date.available | 2023-04-11T13:30:03Z | |
dc.date.issued | 2022-12-20 | |
dc.identifier.citation | Slob , M M , Callingham , J R , Röttgering , H J A , Williams , W L , Duncan , K J , Gasperin , F D , Hardcastle , M J & Miley , G K 2022 , ' Extragalactic Peaked-Spectrum Radio Sources at Low-Frequencies are Young Radio Galaxies ' , Astronomy & Astrophysics , vol. 668 , A186 . https://doi.org/10.1051/0004-6361/202244651 | |
dc.identifier.issn | 0004-6361 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/2210.16570v1 | |
dc.identifier.other | ORCID: /0000-0003-4223-1117/work/133139328 | |
dc.identifier.uri | http://hdl.handle.net/2299/26157 | |
dc.description | © 2022 Dementia and Geriatric Cognitive Disorders. All rights reserved. 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). | |
dc.description.abstract | We present a sample of 373 peaked-spectrum (PS) sources with spectral peaks around 150 MHz, selected using a subset of the two LOw Frequency ARray (LOFAR) all-sky surveys, the LOFAR Two Meter Sky Survey and the LOFAR LBA Sky Survey. These LOFAR surveys are the most sensitive low-frequency widefield surveys to date, allowing us to select low-luminosity peaked-spectrum sources. Our sample increases the number of known PS sources in our survey area by a factor 50. The 5 GHz luminosity distribution of our PS sample shows we sample the lowest luminosity PS sources to date by nearly an order of magnitude. Since high-frequency gigahertz-peaked spectrum sources and compact steep-spectrum sources are hypothesised to be the precursors to large radio galaxies, we investigate whether this is also the case for our sample of low-frequency PS sources. Using optical line emission criteria, we find that our PS sources are predominately high-excitation radio galaxies instead of low-excitation radio galaxies, corresponding to a quickly evolving population. We compute the radio source counts of our PS sample, and find they are scaled down by a factor of ≈40 compared to a general sample of radio-loud active galactic nuclei (AGN). This implies that the lifetimes of PS sources are 40 times shorter than large-scale radio galaxies if their luminosity functions are identical. To investigate this, we compute the first radio luminosity function for a homogeneously selected PS sample. We find that for 144 MHz luminosities ≳1025 W Hz-1, the PS luminosity function has the same shape as an unresolved radio-loud AGN population, but shifted down by a factor of ≈-pagination10. We interpret this as strong evidence that these high-luminosity PS sources evolve into large-scale radio-loud AGN. For local low-luminosity PS sources, there is a surplus of PS sources, which we hypothesise to be the addition of frustrated PS sources that do not evolve into large-scale AGN. | en |
dc.format.extent | 20 | |
dc.format.extent | 4024512 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.subject | astro-ph.GA | |
dc.subject | Galaxies: evolution | |
dc.subject | Radio continuum: galaxies | |
dc.subject | Galaxies: active | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | Extragalactic Peaked-Spectrum Radio Sources at Low-Frequencies are Young Radio Galaxies | en |
dc.contributor.institution | Department of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Engineering & Computer Science | |
dc.contributor.institution | SPECS Deans Group | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85145349726&partnerID=8YFLogxK | |
rioxxterms.versionofrecord | 10.1051/0004-6361/202244651 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |