论文标题
北春天天空中局部星系的完整光谱目录 - 不同环境中的气体和核活动
A complete spectroscopic catalogue of local galaxies in the Northern spring sky -- Gas properties and nuclear activity in different environments
论文作者
论文摘要
为了提供当地宇宙中星系的完整人口统计，包括其核特性，我们介绍了春季，该春季的全部人口普查仅限于北部天空的春季季度（10H <ra <16H; 0 <dec <65）。弹簧目录是30597个星系的通量和体积限制样品（R <17.7 mag，Cz <10000 km/s），包括处女座，昏迷和A1367簇。为了检查各种核激发特性（SF与AGN）的可能的世俗和环境依赖性，我们通过根据（i）在（nuv-i）中的（i）它们在（nuv-i）与（ii）局部星系密度，（iii）恒星，（iiv）恒星，（iv）halo-mass to Contrent（v）中的（v）中的（ii）属于（ii）属于该广场的（v）的（iv）中的（ii）属于Galaxies to Control（v），以及（v）的（III），以及（ii）局部星系密度，（II），进行多维分析。我们提出了采用孤立星系参考样本的基于光学直径的HI缺陷参数的新校准。在处女座和昏迷之间的中间距离处，我们确定了由三个大细丝组成的星系的环形结构。细丝内的HI缺陷星系的一部分表明，从HI含量方面，细丝是田间和群集之间的过渡环境。我们根据四线BPT和两行whan图对核光谱进行了分类，并研究了具有恒星质量及其颜色和环境的AGN分数的变化。通常，我们观察到，塞弗特核比例的质量依赖性对环境几乎没有敏感，而恒星形成核的比例是M*在低密度环境中和蓝云星系中M*的陡峭功能。我们发现，衬里的分数取决于星系颜色，对于logm*> 9.5-10，属于绿谷的星系增加。
With the aim of providing the complete demography of galaxies in the local Universe, including their nuclear properties, we present SPRING, a complete census of local galaxies limited to the spring quarter of the Northern sky (10h< RA <16h; 0< Dec <65). The SPRING catalogue is a flux- and volume-limited sample (r < 17.7 mag, cz < 10000 km/s) of 30597 galaxies, including the Virgo, Coma and A1367 clusters. To inspect possible secular and environmental dependencies of the various nuclear excitation properties (SF vs. AGN), we perform a multidimensional analysis by dividing the sample according to (i) their position in the (NUV-i) vs. M* diagram,(ii) local galaxy density, (iii) stellar-mass, (iv) halo-mass of the group to which galaxies belong, and (v) neutral Hydrogen content. We present a new calibration of the optical diameter-based HI-deficiency parameter employing a reference sample of isolated galaxies. At intermediate distances between Virgo and Coma, we identify a ring-like structure of galaxies constituted by three large filaments. The fraction of HI-deficient galaxies within the filament suggests that filaments are a transitioning environment between field and cluster in terms of HI content. We classify the nuclear spectra according to the four-line BPT and the two-line WHAN diagrams, and investigate the variation in the fraction of AGN with stellar-mass, as well as their colours and environments. In general, we observe that the mass-dependency of the fraction of Seyfert nuclei is little sensitive to the environment, whereas the fraction of star-forming nuclei is a steeper function of M* in lower-density environments and in blue-cloud galaxies. We find that the fraction of LINERs depends on galaxy colour and, for logM* > 9.5-10, increases in galaxies belonging to the green valley.
