Poster Open Access

Giant white-light flares on fully convective stars occur at high latitudes

Ekaterina Ilin; Katja Poppenhaeger; Sarah Jane Schmidt; Silva P. Järvinen; Elisabeth R. Newton; Julián D. Alvarado-Gómez; J. Sebastian Pineda; James R. A. Davenport; Mahmoudreza Oshagh; Ilya Ilyin


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        <foaf:name>Mahmoudreza Oshagh</foaf:name>
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        <foaf:name>Ilya Ilyin</foaf:name>
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    <dct:title>Giant white-light flares on fully convective stars occur at high latitudes</dct:title>
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    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#gYear">2021</dct:issued>
    <dcat:keyword>Very low mass stars</dcat:keyword>
    <dcat:keyword>stellar activity</dcat:keyword>
    <dcat:keyword>flares</dcat:keyword>
    <dcat:keyword>stellar rotation</dcat:keyword>
    <dcat:keyword>stellar magnetic fields</dcat:keyword>
    <dcat:keyword>low-mass stars</dcat:keyword>
    <dct:issued rdf:datatype="http://www.w3.org/2001/XMLSchema#date">2021-02-24</dct:issued>
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    <dct:description>&lt;p&gt;In a &lt;strong&gt;systematic analysis of fully convective stars observed with TESS&lt;/strong&gt;, we detected four stars that displayed giant &lt;strong&gt;flares that were modulated in brightness by the stars&amp;#39; rapid rotation&lt;/strong&gt;. The morphology of the modulation allowed us to directly &lt;strong&gt;localize these flares between &lt;/strong&gt;&lt;strong&gt;55&amp;deg;&lt;/strong&gt;&lt;strong&gt; and &lt;/strong&gt;&lt;strong&gt;81&amp;deg;&lt;/strong&gt;&lt;strong&gt; latitude on the stellar surface&lt;/strong&gt;,&amp;nbsp; far higher than typical solar flare latitudes.&amp;nbsp;&lt;/p&gt; &lt;p&gt;These findings are &lt;strong&gt;a.&lt;/strong&gt; evidence that strong magnetic fields tend to emerge close to the stellar rotational poles for fully convective stars, and &lt;strong&gt;b.&lt;/strong&gt; suggest that the impact of flares on the habitability of exoplanets around small stars could be weaker than previously thought.&lt;/p&gt;</dct:description>
    <dct:description>{"references": ["Davenport et al. (2014), ApJ, 797, 122"]}</dct:description>
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