ngc5253中的超星云和原球状星团

Highlights of Astronomy Pub Date : 1900-01-01 DOI:10.1017/S1539299600013204

J. Turner

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摘要

．在矮星系NGC 5253的星暴中心，一个紧凑而明亮的射电和红外源看起来是一个非常大的紧凑的HII区域。该星云的高密度(n ~ xlO 4 cm -3)和大小(~l-2 pc)需要至少4000颗07恒星的电离量。我们认为这个被光学遮挡的星云是一个形成中的超级星团，或原球状星团，年龄为几十万年。

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The supernebula and protoglobular cluster in NGC 5253

. A compact and bright radio and infrared source within the starburst center of the dwarf galaxy NGC 5253 appears to be an extremely large compact HII region. The high density (n e ~ few xlO 4 cm -3 ) and size (~l-2 pc) of the nebula require the ionization equivalent of at least 4000 07 stars. We suggest that this optically obscured nebula is a forming super star cluster, or protoglobular cluster, with an age of a few hundred thousand years.

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Highlights of Astronomy

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