The Lives of Red Dwarfs

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newmoon

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From KenCroswell.com:<br /><br /><blockquote><font class="small">In reply to:</font><hr /><p>The closer a red dwarf is to the plane of our Galaxy, the more likely it is to sport magnetic activity such as spots and flares, say astronomers in the United States. Furthermore, the activity persists for the first 6 to 7 billion years of the star's life, then rapidly declines, at least for those red dwarfs with spectral type M7.<p><hr /></p></p></blockquote>
 
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From the same link you provided they give an explanation:<br /><br />"West and his colleagues say this correlation arises because, like some people, M7 dwarfs become less active as they age. Red dwarfs are born near the Galactic plane, but as they orbit the Galaxy, they encounter giant molecular clouds whose gravity tosses them to and fro, scattering them to greater distances from the Galactic plane. Thus, stars at greater distances from the Galactic plane tend to be older than those closer to this plane. As this work shows, those same stars also tend to be less active."
 
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