Poster Open Access

UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion

Nicole Reindl; Klaus Werner; Lisa Löbling; Ingrid Pelisoli; Veronika Schaffenroth; Alberto Rebassa-Mansergas; Puji Irawati; Juanjuan Ren


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        <foaf:name>Nicole Reindl</foaf:name>
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            <foaf:name>Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24/25, Germany</foaf:name>
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        <foaf:name>Lisa Löbling</foaf:name>
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        <foaf:name>Ingrid Pelisoli</foaf:name>
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        <foaf:name>Alberto Rebassa-Mansergas</foaf:name>
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            <foaf:name>Departament de Física, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain</foaf:name>
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        <foaf:name>Puji Irawati</foaf:name>
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            <foaf:name>National Astronomical Research Institute of Thailand, Sirindhorn AstroPark, Donkaew, Mae Rim, Chiang Mai 50180, Thailand</foaf:name>
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        <foaf:name>Juanjuan Ren</foaf:name>
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            <foaf:name>Key Laboratory of Space Astronomy and Technology, NationalAstronomical Observatories, Chinese Academy of Sciences, Beijing 100101, P. R. China</foaf:name>
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    <dct:title>UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2021</dct:issued>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2021-02-25</dct:issued>
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    <dct:description>&lt;p&gt;F, G, or K-type stars with a white dwarf companion are relatively rarely known systems in comparison to thousands of M stars with white dwarf companions. We have recently studied one of those systems in detail, and found that the sub-components are very rare stars on their own. The UV source in our system turned out to be an extremely hot white dwarf with an effective temperature of 105,000K. The K-type star was found to be chromospherically active and one of the most rapidly rotating sub-giant known (v_rot=151km/s). Here we present the results of our analysis.&lt;/p&gt;</dct:description>
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