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<ri:Resource created="2018-05-02T14:30:48Z" 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>Infrared morphology of HII regions</title><shortName>J/AZh/94/1003</shortName><identifier>ivo://CDS.VizieR/J/AZh/94/1003</identifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Topchieva A.P.</name></creator><creator><name>Wiebe D.S.</name></creator><creator><name>Kirsanova M.S.</name></creator><creator><name>Krushinskii V.V.</name></creator><date role="Updated">2018-05-30T13:18:10Z</date><date role="Created">2018-05-02T14:30:48Z</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>h-ii-regions</subject><subject>galaxy-classification-systems</subject><subject>infrared-sources</subject><description>A search for infrared ring nebulae associated with regions of ionized hydrogen has been carried out. The New GPS Very Large Array survey at 20 cm forms the basis of the search, together with observations obtained with the Spitzer Space Telescope at 8 and 24um and the Herschel Space Telescope at 70um. Objects having ring-like morphologies at 8um and displaying extended emission at 20cm were selected visually. Emission at 24um having the form of an inner ring or central peak is also observed in the selected objects. A catalog of 99 ring nebulae whose shapes at 8 and 70um are well approximated by ellipses has been compiled. The catalog contains 32 objects whose shapes are close to circular (eccentricities of the fitted ellipses at 8um no greater than 0.6, angular radius exceeding 20"). These objects are promising for comparisons with the results of one-dimensional hydrodynamical simulations of expanding regions of ionized hydrogen.</description><source format="bibcode">2017ARep...61.1015T</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AZh/94/1003</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/V/114">V/114 : MSX6C Infrared Point Source Catalog (Egan+ 2003)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJS/91/347">J/ApJS/91/347 : A 5-GHz VLA Survey of the Galactic Plane (Becker+ 1994)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/ApJ/649/759">J/ApJ/649/759 : Bubbles in the galactic disk (Churchwell+, 2006)</relatedResource><relatedResource ivo-id="ivo://CDS.VizieR/J/MNRAS/424/2442">J/MNRAS/424/2442 : Catalog of bubbles from Milky Way Project (Simpson+, 2012)</relatedResource></relationship></content><rights>https://cds.unistra.fr/vizier-org/licences_vizier.html</rights><capability><interface xsi:type="vr:WebBrowser"><accessURL use="full">https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AZh/94/1003</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AZh/94/1003</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AZh/94/1003</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/AZh/94/1003</accessURL><mirrorURL title="VizieR at IUCAA: Pune, 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