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<ri:Resource created="2009-12-09T14:05:11Z" 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>Amplitudes of single-mode Cepheids</title><shortName>J/A+A/504/959</shortName><identifier>ivo://CDS.VizieR/J/A+A/504/959</identifier><altIdentifier>doi:10.26093/cds/vizier.35040959</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Klagyivik P.</name></creator><creator><name>Szabados L.</name></creator><date role="Updated">2017-11-10T11:16:02Z</date><date role="Created">2009-12-09T14:05:11Z</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>variable-stars</subject><subject>infrared-photometry</subject><subject>visible-astronomy</subject><subject>broad-band-photometry</subject><subject>kron-cousins-photometry</subject><description>The dependence of amplitude on the pulsation period differs from other Cepheid-related relationships. We attempt to revise the period-amplitude (P-A) relationship of Galactic Cepheids based on multi-colour photometric and radial velocity data. Reliable P-A graphs for Galactic Cepheids constructed for the U, B, V, Rc, and Ic photometric bands and pulsational radial velocity variations facilitate investigations of previously poorly studied interrelations between observable amplitudes. The effects of both binarity and metallicity on the observed amplitude, and the dichotomy between short- and long-period Cepheids can both be studied. A homogeneous data set was created that contains basic physical and phenomenological properties of 369 Galactic Cepheids. Pulsation periods were revised and amplitudes were determined by the Fourier method. P-A graphs were constructed and an upper envelope to the data points was determined in each graph. 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Should Not be used for identification.</description><ucd>meta.record</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>Name</name><description>Name of the Cepheid</description><ucd>meta.id;meta.main</ucd><dataType xsi:type="vs:VOTableType" arraysize="10*">char</dataType></column><column><name>GLON</name><description>Galactic longitude</description><unit>deg</unit><ucd>pos.galactic.lon</ucd></column><column><name>GLAT</name><description>Galactic latitude</description><unit>deg</unit><ucd>pos.galactic.lat</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>Period</name><description>Pulsation period</description><unit>d</unit><ucd>time.period</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>&lt;Vmag&gt;</name><description>Mean apparent V magnitude</description><unit>mag</unit><ucd>phot.mag;em.opt.V</ucd><dataType xsi:type="vs:VOTableType">float</dataType></column><column><name>AU</name><description>? Peak-to-peak amplitude in U band</description><unit>mag</unit><ucd>src.var.amplitude</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>AB</name><description>? Peak-to-peak amplitude in B band</description><unit>mag</unit><ucd>src.var.amplitude;em.opt.B</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>AV</name><description>? Peak-to-peak amplitude in V band</description><unit>mag</unit><ucd>src.var.amplitude;em.opt.V</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>AR</name><description>? Peak-to-peak amplitude in Rc band</description><unit>mag</unit><ucd>src.var.amplitude</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>AI</name><description>? Peak-to-peak amplitude in Ic Band</description><unit>mag</unit><ucd>src.var.amplitude</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>ARV</name><description>? Peak-to-peak amplitude of the radial velocity variations (1)</description><unit>km/s</unit><ucd>phys.size;src.orbital</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>q</name><description>? Amplitude ratio (ARV/AB)</description><unit>km.s**-1.mag**-1</unit><ucd>phot.mag;arith.ratio</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>m</name><description>? m parameter (2)</description><unit>um.mag</unit><ucd>stat.fit.param</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_m</name><description>? Error of m parameter</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>e_k</name><description>? Error of k parameter</description><ucd>stat.error</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>[Fe/H]</name><description>? Metallicity</description><unit>log(Sun)</unit><ucd>phys.abund.Z</ucd><dataType xsi:type="vs:VOTableType">float</dataType><flag>nullable</flag></column><column><name>bin</name><description>[0/1] Binarity index: 0 = no known companion, 1 = known binary or &gt;1 known companions</description><ucd>meta.code.multip</ucd><dataType xsi:type="vs:VOTableType">int</dataType></column><column><name>mod</name><description>[0/1]? Pulsation mode (0 = fundamental, 1 = 1st overtone)</description><ucd>meta.code</ucd><dataType xsi:type="vs:VOTableType">int</dataType><flag>nullable</flag></column><column><name>SimbadName</name><description>Simbad column added by the CDS</description><ucd>meta.id</ucd><dataType xsi:type="vs:VOTableType" arraysize="16*">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>