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<p><span class="autocomment">top</span></p> <p><b>新页面</b></p><div>{{NoteTA<br /> |G1 = Astronomy<br /> }}<br /> &#039;&#039;&#039;2MASS J21392676+0220226&#039;&#039;&#039;，簡稱為&#039;&#039;&#039;2MASS 2139&#039;&#039;&#039;，是一顆距離地球約33.7光年的[[棕矮星]]，位於[[寶瓶座]]&lt;ref&gt;Andrew Fazekas. [http://news.nationalgeographic.com/news/2011/09/110913-extreme-storm-brown-dwarf-star-jupiter-spot-space-science/ &quot;Colossal Storm May Rage on Jupiter-like &#039;Failed Star&#039;&quot;.] {{Wayback|url=http://news.nationalgeographic.com/news/2011/09/110913-extreme-storm-brown-dwarf-star-jupiter-spot-space-science/ |date=20190428143857 }}&lt;/ref&gt;。該棕矮星由[[2微米全天巡天]]計劃發現。它的光度變化相當快速且大幅度，8小時內可以變化30%，是至今觀測到棕矮星亮度變化最大的幅度。目前尚不清楚造成如此巨大變化的原因，推測可能是表面有巨大的風暴存在&lt;ref&gt;Dean Praetorius. [http://www.huffingtonpost.com/2011/09/13/storm-on-a-star-brown-dwarf_n_960470.html &quot;Brown Dwarf May Be Host To Massive, Violent Mega Storm&quot;.] {{Wayback|url=http://www.huffingtonpost.com/2011/09/13/storm-on-a-star-brown-dwarf_n_960470.html |date=20160305113730 }} &#039;&#039;[[赫芬顿邮报|The Huffington Post]]&#039;&#039;, 9/13/2011.&lt;/ref&gt;。該風暴甚至可能大於木星的大紅斑，一般認為天文學家可能是從大氣層的洞中觀測到了低空的高溫雲帶。<br /> <br /> == 外部連結 ==<br /> *{{cite journal<br /> |last1= Burgasser|first1=Adam J.<br /> |last2= Cruz|first2=Kelle L.<br /> |last3= Cushing|first3=Michael<br /> |last4= Gelino|first4=Christopher R.<br /> |last5= Looper|first5=Dagny L.<br /> |last6= Faherty|first6=Jacqueline K.<br /> |last7= Kirkpatrick|first7=J. Davy<br /> |last8= Reid|first8=I. Neill<br /> |last9= |first9=<br /> |year=2009<br /> |title=SpeX Spectroscopy of Unresolved Very Low-Mass Binaries. I. Identification of Seventeen Candidate Binaries Straddling the L Dwarf/T Dwarf Transition<br /> |journal=The Astrophysical Journal<br /> |volume= 710|issue= 2|pages=1142<br /> |arxiv=0912.3808<br /> |bibcode=2010ApJ...710.1142B<br /> |doi=10.1088/0004-637X/710/2/1142<br /> }}<br /> <br /> == 參考資料 ==<br /> &lt;references/&gt;<br /> <br /> {{位于30-35光年范围内的恒星系统}}<br /> {{Stars of Aquarius}}<br /> [[Category:棕矮星]]<br /> [[Category:2MASS天體|J21392676+0220226]]<br /> [[Category:寶瓶座]]<br /> <br /> {{Sky|21|39|26.76|+|2|20|22|0.6}}</div>

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