下一代室女座星系团巡天（NGVS）。II. 室女座星系团中的星系目录
The Next Generation Virgo Cluster Survey (NGVS). II. A Catalog of Galaxies in the Virgo Cluster
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中文总结 AI 辅助
NGVS利用MegaCam仪器对室女座星系团全面光学观测，给出含3680个星系的最终目录，新增2100个星系，使已知成员数增加2.3倍，目录深度远超VCC，给出星系光度、结构等参数，提升了对室女座星系团的认识。
中文摘要 AI 辅助
下一代室女座星系团巡天（NGVS）是一项深度、高分辨率成像观测活动，利用加拿大 - 法国 - 夏威夷望远镜上的1平方度的MegaCam仪器，对室女座星系团从核心到其质心半径进行全面光学观测。NGVS在$u^*$、$g$、$i$和$z$波段覆盖了104平方度（在室女座16.5百万秒差距距离处为8.63百万秒差距平方）的连续区域，在$r$波段有额外的有限覆盖。本文给出了整个NGVS区域内室女座星系的最终目录。该目录包括3680个被认为是星系团真正成员的星系，光度跨度达250万倍，从$g = 8.42$星等到$g = 24.41$星等（$M_g = -22.67$星等到$M_g = -6.68$星等）。新目录增加了2100个先前未编目的星系，使已知室女座成员数量增加了2.3倍。该目录在$g = 18.6$星等（$M_g=-12.5$星等，对于老龄恒星群体对应恒星质量$M_* \sim 1.6\times10^7~M_{\odot}$）以下是完整的，在$g = 22.0$星等（$M_g=-9.1$星等，$M_* \sim 6.2\times10^5~M_{\odot}$）时50%完整，比有40多年历史的室女座星系团目录（VCC）深三个星等，VCC长期以来一直是室女座的参考标准。文中给出了所有NGVS星系的光度和结构参数，并以一系列表格呈现，同时还有核和形态分类、恒星质量以及径向速度（如有）。
英文摘要
The Next Generation Virgo Cluster Survey (NGVS) is a deep, high resolution imaging campaign that used the 1 deg$^2$ MegaCam instrument on the Canada-France-Hawaii Telescope to carry out a comprehensive optical survey of the Virgo cluster, from its core to its virial radius. The NGVS covers a contiguous area of 104 deg$^2$ (8.63 Mpc$^2$ at the 16.5 Mpc distance of Virgo) in the $u^*$-,$g$-,$i$-, and $z$-band, with additional limited coverage in $r$. In this paper, we present the final catalog of Virgo galaxies across the entire NGVS area. The catalog includes 3680 galaxies considered to be $bona~fide$ members of the cluster, spanning a factor of 2.5 million in luminosity, from $g = 8.42$ mag to $g = 24.41$ mag ($M_g = -22.67$ mag to $M_g = -6.68$ mag). With 2100 previously uncataloged galaxies, the NGVS catalog augments the number of known Virgo members by a factor 2.3. The catalog is complete down to $g = 18.6$ mag ($M_g=-12.5$ mag, corresponding to a stellar mass $M_* \sim 1.6\times10^7~M_{\odot}$ for an old stellar population) and 50% complete at $g = 22.0$ mag ($M_g=-9.1$ mag, $M_* \sim 6.2\times10^5~M_{\odot}$), three magnitudes deeper than the venerable Virgo Cluster Catalog (VCC), which for over 40 years has served as the reference standard for Virgo. Photometric and structural parameters are derived for all NGVS galaxies and presented in a series of tables, alongside nuclear and morphological classification, as well as stellar masses and, when available, radial velocities.
