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<ri:Resource created="1999-06-19T22:27:37Z" status="active" updated="2025-05-19T09:50:00Z" version="1.2" 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/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>Eq. of State in Magnetic Neutron Stars</title><shortName>J/ApJ/416/276</shortName><identifier>ivo://CDS.VizieR/J/ApJ/416/276</identifier><altIdentifier>doi:10.26093/cds/vizier.14160276</altIdentifier><curation><publisher ivo-id="ivo://CDS">CDS</publisher><creator><name>Rognvaldsson O.E.</name></creator><creator><name>Fushiki I.</name></creator><creator><name>Gudmundsson E.H.</name></creator><creator><name>Pethick C.J.,Yngvason J.</name></creator><date role="Updated">1999-06-19T22:28:10Z</date><date role="Created">1999-06-19T22:27:37Z</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-evolutionary-models</subject><subject>atomic-physics</subject><subject>variable-stars</subject><description>This catalog is based on the calculated equation of state in cold dense matter. Each table in the catalog lists bulk properties of Fe-56 in a magnetic field ranging from one million to 1000 million Tesla. Introduction: We calculate the equation of state for cold dense matter in high magnetic fields in the Thomas-Fermi approximation, taking all Landau levels into account. Total energies and chemical potentials for atoms and matter are also calculated, and we present detailed profiles of the electron density as a function of the distance from the atomic nucleus for various values of the magnetic field strength and total matter density. The profiles show a Landau shell structure, which for iron atoms at low pressure is particularly pronounced for magnetic fields of order 10^11^ G. In compressed matter this structure is reflected in a high compressibility when the density is such that electrons at the boundary of a unit shell start to occupy a new Landau band. This leads to an oscillatory behavior of the density gradient as a function of depth in the surface layers of magnetic neutron stars.</description><source format="bibcode">1993ApJ...416..276R</source><referenceURL>https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/416/276</referenceURL><type>Catalog</type><contentLevel>Research</contentLevel><relationship><relationshipType>IsServedBy</relationshipType><relatedResource ivo-id="ivo://CDS.VizieR/TAP">TAP VizieR generic 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/ApJ/416/276</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/416/276</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/416/276</mirrorURL></interface></capability><capability><interface xsi:type="vs:ParamHTTP"><accessURL use="base">https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/416/276</accessURL><mirrorURL title="VizieR at IUCAA: Pune, India">https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/416/276</mirrorURL><mirrorURL title="VizieR at SAAO: SAAO, South Africa">http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/416/276</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><coverage><footprint ivo-id="ivo://ivoa.net/std/moc"/></coverage><tableset><schema><name>default</name><table><name>J/ApJ/416/276/b10_0</name><description>1 million (10^6^) Tesla</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>density</name><description>density of matter</description><unit>kg.m**-3</unit><ucd>phys.density</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>radius</name><description>radius of cell</description><unit>m</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pressure</name><description>pressure</description><unit>Pa</unit><ucd>phys.pressure</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>eatom</name><description>total energy of atom (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>chempot</name><description>chemical potential (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>zg12</name><description>depth.(surface gravity)/(10^12 m/s^2)</description><unit>m</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column></table><table><name>J/ApJ/416/276/b10_5</name><description>3 million (10^6.5^) Tesla</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>density</name><description>density of matter</description><unit>kg.m**-3</unit><ucd>phys.density</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>radius</name><description>radius of cell</description><unit>m</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pressure</name><description>pressure</description><unit>Pa</unit><ucd>phys.pressure</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>eatom</name><description>total energy of atom (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>chempot</name><description>chemical potential (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>zg12</name><description>depth.(surface gravity)/(10^12 m/s^2)</description><unit>m</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column></table><table><name>J/ApJ/416/276/b11_0</name><description>10 million (10^7^) Tesla</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>density</name><description>density of matter</description><unit>kg.m**-3</unit><ucd>phys.density</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>radius</name><description>radius of cell</description><unit>m</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pressure</name><description>pressure</description><unit>Pa</unit><ucd>phys.pressure</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>eatom</name><description>total energy of atom (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>chempot</name><description>chemical potential (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>zg12</name><description>depth.(surface gravity)/(10^12 m/s^2)</description><unit>m</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column></table><table><name>J/ApJ/416/276/b11_5</name><description>30 million (10^7.5^) Tesla</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>density</name><description>density of matter</description><unit>kg.m**-3</unit><ucd>phys.density</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>radius</name><description>radius of cell</description><unit>m</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pressure</name><description>pressure</description><unit>Pa</unit><ucd>phys.pressure</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>eatom</name><description>total energy of atom (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>chempot</name><description>chemical potential (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>zg12</name><description>depth.(surface gravity)/(10^12 m/s^2)</description><unit>m</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column></table><table><name>J/ApJ/416/276/b12_0</name><description>100 million (10^8^) Tesla</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>density</name><description>density of matter</description><unit>kg.m**-3</unit><ucd>phys.density</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>radius</name><description>radius of cell</description><unit>m</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pressure</name><description>pressure</description><unit>Pa</unit><ucd>phys.pressure</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>eatom</name><description>total energy of atom (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>chempot</name><description>chemical potential (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>zg12</name><description>depth.(surface gravity)/(10^12 m/s^2)</description><unit>m</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column></table><table><name>J/ApJ/416/276/b12_5</name><description>300 million (10^8.5^) Tesla</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>density</name><description>density of matter</description><unit>kg.m**-3</unit><ucd>phys.density</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>radius</name><description>radius of cell</description><unit>m</unit><ucd>phys.size.radius</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>pressure</name><description>pressure</description><unit>Pa</unit><ucd>phys.pressure</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>eatom</name><description>total energy of atom (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>chempot</name><description>chemical potential (in 1.602E-16J)</description><unit>keV</unit><ucd>phys.energy</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column><column><name>zg12</name><description>depth.(surface gravity)/(10^12 m/s^2)</description><unit>m</unit><ucd>pos.distance</ucd><dataType xsi:type="vs:VOTableType">double</dataType></column></table><table><name>J/ApJ/416/276/b13_0</name><description>1000 million (10^9^) Tesla</description><column><name>recno</name><description>Record number assigned by the VizieR team. 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