Dark matter and the velocity field of galaxies in the local universe

不明暗物质比发光物质(恒星、气体和星系)重好几倍。暗物质是通过它在宇宙中的引力效应被探测到的。最近利用澳大利亚独特的设施完成了两项调查，一项是HI Parkes全天空调查，另一项是六度场星系调查。星系的流场将从这些测量中测量出来。这个项目将通过绘制暗物质的分布图，为社区在这些调查中的投资提供回报。这项工作与计划于2013年开始的后续调查--澳大利亚平方公里阵列探路者全天调查--将使澳大利亚天文学家在了解暗物质分布方面明显走在前列。

Unidentified dark matter outweighs the luminous matter (stars, gas, and galaxies) by several times. Dark matter is detected by its gravitational effects in the Universe. Two recent surveys have been completed using unique Australian facilities, the HI Parkes All Sky Survey and the Six Degree Field galaxy survey. The flow field of galaxies will be measured from these surveys. This project will provide a return on the community investment in these surveys, by mapping the distribution of dark matter. This work, together with a successor survey, the Australian Square Kilometre Array Pathfinder all sky survey, scheduled to begin in 2013, will put Australian astronomers clearly in the lead in understanding the distribution of dark matter.