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dc.contributor.author
Muriel, Hernan
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dc.date.available
2023-01-03T13:33:40Z
dc.date.issued
2016-07
dc.identifier.citation
Muriel, Hernan; The fraction of BL Lacertae objects in groups of galaxies; EDP Sciences; Astronomy and Astrophysics; 591; 7-2016; 1-4
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/183149
dc.description.abstract
Context. BL Lac objects are a rare class of active galactic nuclei that typically show featureless optical spectra that make it difficult to estimate the redshift. A novel method for estimating the redshift of BL Lac objects has recently been proposed which assumes that these objects typically reside in groups of galaxies. Aims. The aim of this work is to estimate the fraction of BL Lac objects that reside in groups of galaxies. Methods. We use a sample of groups (M12 catalogue) selected by applying a friends-of-friends algorithm in the SDSS DR12. Galaxies in the M12 sample were cross-correlated with the sample of blazars in the BZCAT. We found that 121 galaxies in the M12 catalogue are blazars in the BZCAT sample, all but one are BL Lac objects, and a large fraction are classified as BL Lac-galaxy dominated. Results. Analysing the fraction of galaxies in groups as a function of redshift we have estimated a correction factor that takes into account the typical incompleteness of the catalogues based on the friends-of-friends algorithm. Once this factor was applied to the sample of BL Lac objects with a counterpart in the M12 catalogue, we found that the percentage of BL Lac objects in groups is ≳ 67 ± 8%. Conclusions. The high rate of BL Lac objects in groups found in this work strongly supports a recent method that has successfully estimated the redshift of BL Lac objects with featureless spectra.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
BL LACERTAE OBJECTS: GENERAL
dc.subject
GALAXIES: GROUPS: GENERAL
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
The fraction of BL Lacertae objects in groups of galaxies
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2022-12-06T17:27:04Z
dc.identifier.eissn
1432-0746
dc.journal.volume
591
dc.journal.pagination
1-4
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Muriel, Hernan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2016/07/aa28736-16/aa28736-16.html#:~:text=With%20this%20procedure%2C%20we%20found,galaxies%20is%2043%20%C2%B1%205%25.
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1051/0004-6361/201628736
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