Circularly polarised LoTSS sources [Dataset]

We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144MHz LOFAR Two-metre Sky Survey to prodce circularly polarised maps with a median noise of 140uJy/beam and resolution of 20-arcsec for 27%...

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Detalhes bibliográficos
Autor: Pérez-Torres, M.
Formato: conjunto de datos
Fecha de publicación:2023
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/365487
Acesso em linha:http://hdl.handle.net/10261/365487
https://ui.adsabs.harvard.edu/abs/2023A&A...670A.124C
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/670/A124
Access Level:acceso abierto
Palavra-chave:https://cdsarc.cds.unistra.fr/vizier/catstd/ADCkwds.htx
Surveys
Polarization
Radio continuum
Radio sources
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spelling Circularly polarised LoTSS sources [Dataset]Pérez-Torres, M.https://cdsarc.cds.unistra.fr/vizier/catstd/ADCkwds.htxSurveysPolarizationRadio continuumRadio sourcesWe present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144MHz LOFAR Two-metre Sky Survey to prodce circularly polarised maps with a median noise of 140uJy/beam and resolution of 20-arcsec for 27% of the northern sky (5634deg^2^). The leakage of total intensity into circular polarisation is measured to be ~0.06%, and our survey is complete at flux densities >=1mJy. A detection is considered reliable when the circularly polarised fraction exceeds 1%. We find the population of circularly polarised sources is composed of four distinct classes: stellar systems, pulsars, active galactic nuclei, and sources unidentified in the literature. The stellar systems can be further separated into chromospherically active stars, M dwarfs, and brown dwarfs. Based on the circularly polarised fraction and lack of an optical counterpart, we show it is possible to infer whether the unidentified sources are likely unknown pulsars or brown dwarfs. By the completion of this survey of the northern sky, we expect to detect 300+/-100 circularly polarised sources.The column numbers, names, and units for the V-LoTSS catalogue are described below. All Stokes I information is similar to that found in the LoTSS-DR2 catalogue but can differ depending on whether the source is variable (Shimwell et al., 2022A&A...659A...1S, Cat. J/A+A/659/A1). For the few sources that are not present in LoTSS-DR2 because of their variability, we have formed their LoTSS name in line with the convention defined by (Shimwell et al., 2022A&A...659A...1S, Cat. J/A+A/659/A1). We report some Gaia DR3 measurements if the Stokes V source has a counterpart in that survey. Similarly, we report some pulsar properties if the source has a counterpart in Australia Telescope National Facility Pulsar Catalogue (PSRCAT; v1.68; Manchester et al., 2005AJ....129.1993M, Cat. B/psr). Full details can be found in the paper.Financial support from the Severo Ochoa grant CEX2021-001131-S funded by MCIN/AEI/ 10.13039/501100011033NoCentre de Données astronomiques de Strasbourg (CDS)Ministerio de Ciencia e Innovación (España)Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]202420242023info:eu-repo/semantics/datasethttp://purl.org/coar/resource_type/c_ddb1http://hdl.handle.net/10261/365487https://ui.adsabs.harvard.edu/abs/2023A&A...670A.124Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/670/A124reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Inglés#PLACEHOLDER_PARENT_METADATA_VALUE#CEX2021-001131-S (Centro Excelencia Severo Ochoa)V-LoTSS: The circularly polarised LOFAR Two-metre Sky Survey., 10.1051/0004-6361/202245567Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/3654872026-05-22T06:33:51Z
dc.title.none.fl_str_mv Circularly polarised LoTSS sources [Dataset]
title Circularly polarised LoTSS sources [Dataset]
spellingShingle Circularly polarised LoTSS sources [Dataset]
Pérez-Torres, M.
https://cdsarc.cds.unistra.fr/vizier/catstd/ADCkwds.htx
Surveys
Polarization
Radio continuum
Radio sources
title_short Circularly polarised LoTSS sources [Dataset]
title_full Circularly polarised LoTSS sources [Dataset]
title_fullStr Circularly polarised LoTSS sources [Dataset]
title_full_unstemmed Circularly polarised LoTSS sources [Dataset]
title_sort Circularly polarised LoTSS sources [Dataset]
dc.creator.none.fl_str_mv Pérez-Torres, M.
author Pérez-Torres, M.
author_facet Pérez-Torres, M.
author_role author
dc.contributor.none.fl_str_mv Ministerio de Ciencia e Innovación (España)
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv https://cdsarc.cds.unistra.fr/vizier/catstd/ADCkwds.htx
Surveys
Polarization
Radio continuum
Radio sources
topic https://cdsarc.cds.unistra.fr/vizier/catstd/ADCkwds.htx
Surveys
Polarization
Radio continuum
Radio sources
description We present the detection of 68 sources from the most sensitive radio survey in circular polarisation conducted to date. We used the second data release of the 144MHz LOFAR Two-metre Sky Survey to prodce circularly polarised maps with a median noise of 140uJy/beam and resolution of 20-arcsec for 27% of the northern sky (5634deg^2^). The leakage of total intensity into circular polarisation is measured to be ~0.06%, and our survey is complete at flux densities >=1mJy. A detection is considered reliable when the circularly polarised fraction exceeds 1%. We find the population of circularly polarised sources is composed of four distinct classes: stellar systems, pulsars, active galactic nuclei, and sources unidentified in the literature. The stellar systems can be further separated into chromospherically active stars, M dwarfs, and brown dwarfs. Based on the circularly polarised fraction and lack of an optical counterpart, we show it is possible to infer whether the unidentified sources are likely unknown pulsars or brown dwarfs. By the completion of this survey of the northern sky, we expect to detect 300+/-100 circularly polarised sources.
publishDate 2023
dc.date.none.fl_str_mv 2023
2024
2024
dc.type.none.fl_str_mv info:eu-repo/semantics/dataset
http://purl.org/coar/resource_type/c_ddb1
format dataset
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/365487
https://ui.adsabs.harvard.edu/abs/2023A&A...670A.124C
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/670/A124
url http://hdl.handle.net/10261/365487
https://ui.adsabs.harvard.edu/abs/2023A&A...670A.124C
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/670/A124
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv #PLACEHOLDER_PARENT_METADATA_VALUE#
CEX2021-001131-S (Centro Excelencia Severo Ochoa)
V-LoTSS: The circularly polarised LOFAR Two-metre Sky Survey., 10.1051/0004-6361/202245567
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Centre de Données astronomiques de Strasbourg (CDS)
publisher.none.fl_str_mv Centre de Données astronomiques de Strasbourg (CDS)
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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