孤立星系XIII的AMIGA样本。几乎“无营养”样本的HI含量
The AMIGA sample of isolated galaxies XIII. The HI content of an almost "nurture free" sample
摘要：
我们目前最大的HI单碟观测孤立星系的目录和相应的HI标度关系，作为多波长项目AMIGA（孤立星系中的星际介质分析）的一部分。尽管对星系的HI含量进行了大量的研究，但自1984年以来，没有对最孤立的L* 星系进行过修订。总的来说，我们有测量或约束的HI质量的844星系的孤立星系表（CIG），获得我们自己的观测在阿雷西博，Effelsberg，Nancay和GBT，和光谱的文献。对该样本进行切割以确保隔离和高水平的完整性。然后，我们拟合HI缩放关系的基础上的光度，光学直径和形态。我们的回归模型结合了所有数据，包括上限，并考虑了两个变量的不确定性以及距离的不确定性。HI质量与光学直径的标度关系与Haynes & Giovanelli（1984）的标度关系符合得很好，但我们与光度的标度关系要陡得多。这归因于光度的大不确定性，当使用OLS回归（先前使用）时引入偏差，以及样品的不同形态分布。我们发现，形态的关系的主要影响是增加的截距和平坦的斜率向后来的类型。这些趋势在以前的研究中并不明显，因为探测到的早期星系数量很少。AMIGA样本的HI标度关系定义了几乎“无滋养”星系HI含量的最新度量。这些关系允许预期的HI质量，在没有相互作用的情况下，一个星系被预测到0.25德克斯内，因此适合作为统计措施的相互作用对星系的中性气体含量的影响。（节录）
英文摘要：
We present the largest catalogue of HI single dish observations of isolated galaxies to date and the corresponding HI scaling relations, as part of the multi-wavelength project AMIGA (Analysis of the interstellar Medium in Isolated GAlaxies). Despite numerous studies of the HI content of galaxies, no revision has been made for the most isolated L* galaxies since 1984. In total we have measurements or constraints on the HI masses of 844 galaxies from the Catalogue of Isolated Galaxies (CIG), obtained with our own observations at Arecibo, Effelsberg, Nancay and GBT, and spectra from the literature. Cuts are made to this sample to ensure isolation and a high level of completeness. We then fit HI scaling relations based on luminosity, optical diameter and morphology. Our regression model incorporates all the data, including upper limits, and accounts for uncertainties in both variables, as well as distance uncertainties. The scaling relation of HI mass with optical diameter is in good agreement with that of Haynes & Giovanelli 1984, but our relation with luminosity is considerably steeper. This is attributed to the large uncertainties in the luminosities, which introduce a bias when using OLS regression (used previously), and the different morphology distributions of the samples. We find that the main effect of morphology on the relations is to increase the intercept and flatten the slope towards later types. These trends were not evident in previous works due to the small number of detected early-type galaxies. The HI scaling relations of the AMIGA sample define an up-to-date metric of the HI content of almost "nurture free" galaxies. These relations allow the expected HI mass, in the absence of interactions, of a galaxy to be predicted to within 0.25 dex, and are thus suitable for use as statistical measures of the impact of interactions on the neutral gas content of galaxies. (Abridged)
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