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<ri:Resource created="2016-01-21T14:56:12Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" xmlns:cs="http://www.ivoa.net/xml/ConeSearch/v1.0" xmlns:ri="http://www.ivoa.net/xml/RegistryInterface/v1.0" xmlns:vr="http://www.ivoa.net/xml/VOResource/v1.0" xmlns:vs="http://www.ivoa.net/xml/VODataService/v1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.ivoa.net/xml/ConeSearch/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/ConeSearch.xsd http://www.ivoa.net/xml/VOResource/v1.0 http://vo.ari.uni-heidelberg.de/docs/schemata/VOResource.xsd http://www.ivoa.net/xml/VODataService/v1.1 http://vo.ari.uni-heidelberg.de/docs/schemata/VODataService.xsd" xsi:type="vs:CatalogService"><title>IR photometry of nearby RLGs</title><shortName>J/MNRAS/449/3191</shortName><identifier>ivo://CDS.VizieR/J/MNRAS/449/3191</identifier><altIdentifier>doi:10.26093/cds/vizier.74493191</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Yang X.-H.</name></creator><creator><name>Chen P.-S.</name></creator><creator><name>Huang Y.</name></creator><date role="Updated">2024-08-14T20:21:11Z</date><date role="Created">2016-01-21T14:56:12Z</date><contact><name>CDS support team</name><address>CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France</address><email>cds-question@unistra.fr</email></contact></curation><content><subject>radio-galaxies</subject><subject>infrared-photometry</subject><description>By combining the data of the Two Micron All Sky Survey, the Wide-Field Infrared Survey Explorer and the AKARI satellite, we study the infrared colour properties of a sample of 2712 nearby radio-luminous galaxies (RLGs). These RLGs are divided into radio-loud (RL) active galactic nuclei (AGNs), mainly occurring at redshifts of 0.05&lt;z&lt;0.3 and star-forming-dominated RLGs (SFGs), mainly occurring at redshifts of 0.01&lt;z&lt;0.15. RL AGNs and SFGs are separately distributed in the ([3.4]-[4.6])-([4.6]-[12]) two-colour diagram, in which the RL AGNs display a double-core distribution, and the SFGs display a single-core distribution. SFGs have a redder [4.6]-[12] colour than RL AGNs due to the significant contribution from the dust component of SFGs. We find simple criteria of mid-infrared (MIR) colour separation between RL AGNs and SFGs such that: 95 per cent of RL AGNs have [4.6]-[12]&lt;3.0 and 94 per cent of SFGs have [4.6]-[12]&gt;3.0. We also analyse the MIR colours of RL AGNs divided into low- and high-excitation radio galaxies (LERGs and HERGs, respectively). The ([3.4]-[4.6])-([4.6]-[12]) diagram clearly shows separate distributions of LERGs and HERGs and a region of overlap, which suggests that LERGs and HERGs have different MIR properties. LERGs are responsible for the double-core distribution of RL AGNs on the ([3.4]-[4.6])-([4.6]-[12]) diagram. In addition, we also suggest 90-140{mu}m band spectral index {alpha}(90, 140)&lt;-1.4 as a criterion of selecting nearby active galaxies with non-thermal emissions at far-infrared wavelengths.</description><source format="bibcode">2015MNRAS.449.3191Y</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/449/3191</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic service</relatedResource></relationship><relationship><relationshipType>IsServedBy</relationshipType><relatedResource>Conesearch service</relatedResource></relationship><relationship><relationshipType>related-to</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/II/297">II/297 : AKARI/IRC mid-IR all-sky Survey (ISAS/JAXA, 2010)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/II/298">II/298 : AKARI/FIS All-Sky Survey PS Catalog(ISAS/JAXA, 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