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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    <subfield code="u">Institut für Astronomie und Astrophysik, Kepler Center forAstro and Particle Physics, Eberhard Karls Universität, Sand 1, 72076Tübingen, Germany</subfield>
    <subfield code="a">Klaus Werner</subfield>
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    <subfield code="u">Institut für Astronomie und Astrophysik, Kepler Center forAstro and Particle Physics, Eberhard Karls Universität, Sand 1, 72076Tübingen, Germany</subfield>
    <subfield code="a">Lisa Löbling</subfield>
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    <subfield code="u">Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24/25, Germany</subfield>
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    <subfield code="u">Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24/25, Germany</subfield>
    <subfield code="a">Veronika Schaffenroth</subfield>
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    <subfield code="u">Departament de Física, Universitat Politècnica de Catalunya, c/Esteve Terrades 5, E-08860 Castelldefels, Spain</subfield>
    <subfield code="a">Alberto Rebassa-Mansergas</subfield>
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    <subfield code="u">Institut für Physik und Astronomie, Universität Potsdam, Karl-Liebknecht-Straße 24/25, Germany</subfield>
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    <subfield code="a">Nicole Reindl</subfield>
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    <subfield code="a">UCAC2 46706450: A rapidly rotating K-type subgiant with an extremely hot white dwarf companion</subfield>
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    <subfield code="a">&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;</subfield>
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