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Molecular Gas in the Spectacular Ring Galaxy NGC 1144

机译:壮观的环星系NGC 1144中的分子气体

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摘要

We have detected extremely wide (1100 km s~1) CO(10) emission from NGC 1144, an interacting, luminous infrared galaxy that is the dominant component of the Arp 118 system. The observations show that NGC 1144 is one of the most CO-luminous galaxies in the local universe, with a CO luminosity twice that of Arp 220. Maps with the IRAM interferometer show that the CO is not in or very near the Seyfert 2 nucleus, but in the 20 kpc diameter ring that extends halfway between NGC 1144 and the elliptical galaxy NGC 1143. The greatest gas concentration, with 40/100 of the CO luminosity, is in the southern part of the ring, in NGC 1144. Another 15/100 of the CO luminosity comes from the dominant 10 μm source, a giant extranuclear H II region.
机译:我们从NGC 1144(一个相互作用的发光红外星系,是Arp 118系统的主要组成部分)检测到了极宽的(1100 km s〜1)CO(10)发射。观测结果表明,NGC 1144是局部宇宙中最含CO的星系之一,其CO发光度是Arp 220的两倍。使用IRAM干涉仪的地图显示,CO不在Seyfert 2核中或附近。但直径为20 kpc的环在NGC 1144和椭圆星系NGC 1143之间延伸一半。CO发光度最高的气体浓度为40/100,位于环的南部,NGC1144。另外15 / 100%的CO发光度来自占主导地位的10μm光源,这是一个巨大的核外H II区。

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