论文标题
GMRT存档原子气调查 - I.调查定义，方法论和试点样本的初始结果
The GMRT archive atomic gas survey -- I. Survey definition, methodology, and initial results from the pilot sample
论文作者
论文摘要
星系中HI的干涉测定在附近星系研究中起着关键作用。与单次观察相比，它在没有前所未有的分辨率的星系中提供了气体的分布。过去，对附近星系进行了几项大规模的HI调查。但是，由于个人努力，大多数由不到100个星系组成。另一方面，射电望远镜的当今档案包括至少数百个星系的数据。为了利用这些数据集，我们构建了一个样本，包括HI中巨型仪表波射电望远镜（GMRT）观察到的所有星系。这导致总共515个星系，这是迄今为止最大的样本。我们打算统一分析所有数据并进行不同的令人兴奋的科学。作为试点项目，我们分析了来自11个星系的数据，并在本文中介绍数据产品。我们进一步研究了这些星系中的中性ISM，并使用多高斯分解方法提取冷和温暖的相位。该试点项目确保了数据的质量，这将使我们能够使用完整的样本进行重要的科学调查。
Interferometric observations of HI in galaxies played a pivotal role in studies of nearby galaxies. Compared to single-dish observation, it provides resolved distribution of gas in galaxies with unprecedented resolution. Several extensive HI surveys of nearby galaxies have been performed in the past; however, most of them consist of less than 100 galaxies due to individual efforts. On the other hand, present-day archives of the radio telescopes include data for at least several hundred galaxies. To utilize these data sets to their full potential, we construct a sample including all galaxies observed by the Giant Meter wave Radio Telescope (GMRT) in HI. This results in a total of 515 galaxies, the largest sample to date. We intend to analyze all the data uniformly and carry out different exciting science. As a pilot project, we analyze data from 11 galaxies and present the data products in this paper. We further investigate the neutral ISM in these galaxies and extract cold and warm phases using a multi-Gaussian decomposition method. This pilot project assures the quality of the data, which will enable us to perform critical science investigations using the full sample.
