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THE SMALL ISOLATED GAS-RICH IRREGULAR DWARF (SIGRID) GALAXY SAMPLE: DESCRIPTION AND FIRST RESULTS

机译:小型隔离的富含气体的不规则DWARF(SIGRID)银河样品:描述和第一结果

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Using an optically unbiased selection process based on the HIPASS neutral hydrogen survey, we have selected a sample of 83 spatially isolated, gas-rich dwarf galaxies in the southern hemisphere with cz between 350 and 1650?km?s–1, and with R-band luminosities and H I masses less than that of the Small Magellanic Cloud. The sample is an important population of dwarf galaxies in the local universe, all with ongoing star formation, and most of which have no existing spectroscopic data. We are measuring the chemical abundances of these galaxies, using the integral-field spectrograph on the Australian National University 2.3?m telescope, the Wide-Field Spectrograph. This paper describes our survey criteria and procedures, lists the survey sample, and reports on initial observations.
机译:使用基于HIPASS中性氢调查的光学无偏选择过程,我们选择了南半球83个空间分离的,富气的矮星系样本,其cz在350和1650?km?s-1之间,R-带的光度和HI质量小于小麦哲伦星云。该样本是当地宇宙中一个重要的矮星系种群,所有星系都在不断形成恒星,并且大多数都没有现成的光谱数据。我们正在使用澳大利亚国立大学2.3?m望远镜上的积分场光谱仪(广域光谱仪)来测量这些星系的化学丰度。本文介绍了我们的调查标准和程序,列出了调查样本,并报告了初步观察结果。

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