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<ri:Resource created="2009-04-01T17:05:07Z" status="active" updated="2025-06-13T15:25:00Z" 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>CaII HK emission in rapidly rotating stars</title><shortName>J/A+A/493/1099</shortName><identifier>ivo://CDS.VizieR/J/A+A/493/1099</identifier><altIdentifier>doi:10.26093/cds/vizier.34931099</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Schroeder C.</name></creator><creator><name>Reiners A.</name></creator><creator><name>Schmitt J.H.M.M.</name></creator><date role="Updated">2017-11-10T11:15:52Z</date><date role="Created">2009-04-01T17:05:07Z</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>stellar-atmospheres</subject><description>We present measurements of chromospheric CaII H&amp;K activity for 481 solar-like stars. To determine the activity we used the Mount Wilson method and a newly developed method which allows to also measure CaII H&amp;K emission features in very rapidly rotating stars. The new technique determines the activity by comparing the line shapes from known inactive slowly rotating template stars that have been artificially broadened to spectra of rapid rotators. We have analyzed solar-like stars ranging from T_eff}=5000 to 7800K with rotational velocities up to 190km/s in our sample of FOCES and FEROS spectra. The effects of the rotational broadening on the two methods have been quantified. 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