蓝色致密矮星NGC 1705的HI合成观测
HI synthesis observations of the blue compact dwarf NGC 1705
摘要：
介绍了澳大利亚望远镜紧凑阵列对矮星系NGC1705的高分辨线观测。这些数据被用来追踪星系的引力势到几个恒星盘尺度的长度。为系统导出旋转曲线，并用于生成质量模型。暗物质在几乎所有的银河系中心半径上都支配着引力势。NFW和伪等温球晕参数化允许良好的再现的意见。这些模型表明，NGC 1705有一个暗物质晕，它比以前认为的要致密得多。
英文摘要：
Australia Telescope Compact Array HI-line observations of the nearby dwarf galaxy NGC 1705 are presented. The data are used to trace the gravitational potential of the galaxy out to several stellar disc scale lengths. A rotation curve is derived for the system and used to generate mass models. Dark matter dominates the gravitational potential at nearly all galactocentric radii. NFW and pseudo-isothermal sphere halo parameterisations allowing for good reproductions of the observations. The models suggest NGC 1705 to have a dark matter halo that it much denser and more compact than previously thought.
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