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<ri:Resource created="2008-11-22T16:45:22Z" 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>Distribution of HII regions in disk galaxies</title><shortName>J/ApJS/178/1</shortName><identifier>ivo://CDS.VizieR/J/ApJS/178/1</identifier><altIdentifier>doi:10.26093/cds/vizier.21780001</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Sanchez N.</name></creator><creator><name>Alfaro E.J.</name></creator><date role="Updated">2017-09-29T09:03:39Z</date><date role="Created">2008-11-22T16:45:22Z</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>galaxies</subject><subject>catalogs</subject><subject>h-ii-regions</subject><description>It is known that interstellar gas has a fractal structure in a wide range of spatial scales with a fractal dimension that seems to be a constant around D_f_~2.7. It is expected that stars forming from this fractal medium exhibit similar fractal patterns. Here we address this issue by quantifying the degree to which star-forming events are clumped. We develop, test, and apply a precise and accurate technique to calculate the correlation dimension Dc of the distribution of HII regions in a sample of disk galaxies.</description><source format="bibcode">2008ApJS..178....1S</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/178/1</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></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/ApJS/178/1</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/178/1</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/178/1</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/178/1</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/178/1</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/178/1</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface></capability><capability standardID="ivo://ivoa.net/std/TAP#aux"><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://tapvizier.cds.unistra.fr/TAPVizieR/tap</accessURL></interface></capability><capability xsi:type="cs:ConeSearch" standardID="ivo://ivoa.net/std/ConeSearch"><description>Cone search capability for table J/ApJS/178/1/galaxies (Properties of the galaxies in the sample and calculated fractal dimension of the HII distribution)</description><interface xsi:type="vs:ParamHTTP" role="std"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJS/178/1/galaxies?</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/conesearch/J/ApJS/178/1/galaxies?</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJS/178/1/galaxies?</mirrorURL><queryType>GET</queryType><resultType>text/xml+votable</resultType></interface><maxSR>180.0</maxSR><maxRecords>50000</maxRecords><verbosity>true</verbosity><testQuery><ra>168.1391667</ra><dec>-36.4252778</dec><sr>0.005555555555555556</sr></testQuery></capability><coverage><spatial>6/816 2155 2709 3042 4149 4439 5142 5202 5581 5715 5966 5975 7498 7584 7606 7799 7878 7957 8196 8256 8334 10475 10637 10856 10900 10912 10927 10977 11019 11027 11434 11582 13522 15592 16871 17592 17754 17780 17905 18398 20000 20270 22495 25438 25518 25599 25742 25779 25890 25997 26090 26113 26148 26303 26472 27426 27512 27514 27604 27653 27728 27828 27861 27914 27917 27918 27942 28035 28123 28149 28535 28631 29795 30970 31345 31469 31880 33920 33958 34273 35993 36261 36785 38268 38351 38646 38655 38703 38868 40221 42016 42027 43339 43677 43748 44718 46399 46442 47047</spatial><footprint ivo-id="ivo://ivoa.net/std/moc">https://cdsarc.cds.unistra.fr/viz-bin/moc/J/ApJS/178/1?format=ascii</footprint><waveband>Optical</waveband></coverage><tableset><schema><name>default</name><table><name>J/ApJS/178/1/galaxies</name><description>Properties of the galaxies in the sample and calculated fractal dimension of the HII distribution</description><column><name>recno</name><description>Record number assigned by the VizieR team. Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>Galaxy name</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType></column><column><name>MType</name><description>Morphological Hubble type</description><ucd>src.morph.type</ucd><dataType xsi:type="vs:VOTableType" arraysize="4*">char</dataType></column><column><name>PA</name><description>Position angle</description><unit>deg</unit><ucd>pos.posAng</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>IA</name><description>Inclination angle</description><unit>deg</unit><ucd>src.orbital.inclination</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>TType</name><description>Morphological de Vaucouleurs type</description><ucd>src.morph.type</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Arm</name><description>? Spiral arm class</description><ucd>meta.code.class</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>Dist</name><description>Distance to the galaxy</description><unit>Mpc</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>BMAG</name><description>? B-band absolute magnitude</description><unit>mag</unit><ucd>phot.mag</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>R25</name><description>25mag/arcsec^2^ isophotal radius</description><unit>kpc</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Vrot</name><description>? Maximum rotation velocity corrected for inclination</description><unit>km/s</unit><ucd>phys.veloc.rotat;stat.max</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>FileName</name><description>Name of the file containing the HII region data, in the "hii" subdirectory</description><ucd>meta.id;meta.file</ucd><dataType xsi:type="vs:VOTableType" arraysize="12*">char</dataType></column><column><name>plot</name><description>Get a plot of the HII regions of this galaxy</description><ucd>meta.ref.url</ucd><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>HII</name><description>Number of catalogued HII regions</description><ucd>meta.number</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Dc</name><description>Calculated correlation (fractal) dimension</description><ucd>stat.correlation</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>e_Dc</name><description>Estimated uncertainty in Dc</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Rmin</name><description>Minimum spatial scale of the distribution</description><unit>kpc</unit><ucd>phys.size</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Rmax</name><description>Maximum spatial scale of the distribution</description><unit>kpc</unit><ucd>src.morph.scLength</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>NED</name><description>Simbad column added by the CDS</description><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>Simbad</name><description>Simbad column added by the CDS</description><dataType xsi:type="vs:VOTableType" arraysize="*">char</dataType></column><column><name>_RA</name><description>Right Ascension (J2000) from SIMBAD (not part of the original data)</description><unit>deg</unit><ucd>pos.eq.ra;meta.main</ucd></column><column><name>_DE</name><description>Declination (J2000) from SIMBAD (not part of the original data)</description><unit>deg</unit><ucd>pos.eq.dec;meta.main</ucd></column></table></schema></tableset></ri:Resource>