Abstract

We use the data of modern digital sky surveys (PanSTARRS-1, SDSS) combined with H I-line and far ultraviolet (GALEX) surveys to reclassify 165 early-type galaxies from the Catalog of Isolated Galaxies (KIG). As a result, the number of E- and S0-type galaxies reduced to 91. Our search for companions of early-type KIG galaxies revealed 90 companions around 45 host galaxies with line-of-sight velocity differences \(\left| {dV} \right| < 500\) km s^–1 and linear projected separations \({{R}_{p}} < 750\) kpc. We found no appreciable differences in either integrated luminosity or color of galaxies associated with the presence or absence of close neighbors. We found a characteristic orbital mass-to-luminosity ratio for 26 systems “KIG galaxy–companion” to be \({{{{M}_{ \odot }}} \mathord{\left/ {\vphantom {{{{M}_{ \odot }}} {{{L}_{K}}}}} \right. \kern-0em} {{{L}_{K}}}} = {{(74 \pm 26){{M}_{ \odot }}} \mathord{\left/ {\vphantom {{(74 \pm 26){{M}_{ \odot }}} {{{L}_{ \odot }}}}} \right. \kern-0em} {{{L}_{ \odot }}}}\), which is consistent with the \({{{{M}_{{{\text{orb}}}}}} \mathord{\left/ {\vphantom {{{{M}_{{{\text{orb}}}}}} {{{L}_{K}}}}} \right. \kern-0em} {{{L}_{K}}}}\) estimates for early-type isolated galaxies in the 2MIG catalog (\({{63{{M}_{ \odot }}} \mathord{\left/ {\vphantom {{63{{M}_{ \odot }}} {{{L}_{ \odot }}}}} \right. \kern-0em} {{{L}_{ \odot }}}}\)), and also with the \({{{{M}_{{{\text{orb}}}}}} \mathord{\left/ {\vphantom {{{{M}_{{{\text{orb}}}}}} {{{L}_{K}}}}} \right. \kern-0em} {{{L}_{K}}}}\) estimates for E- and S0-type galaxies in the Local Volume: \(38 \pm 22\) (NGC 3115), \(82 \pm 26\) (NGC 5128), \(65 \pm 20\) (NGC 4594). The high halo-to-stellar mass ratio for E- and S0-type galaxies compared to the average \({{(20 \pm 3){{M}_{ \odot }}} \mathord{\left/ {\vphantom {{(20 \pm 3){{M}_{ \odot }}} {{{L}_{ \odot }}}}} \right. \kern-0em} {{{L}_{ \odot }}}}\) ratio for bulgeless spiral galaxies is indicative of a significant difference between the dynamic evolution of early- and late-type galaxies.

中文翻译：

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孤立星系目录 (KIG) 中的早型 (E, S0) 星系

摘要

我们使用现代数字天空调查（PanSTARRS-1，SDSS）的数据结合 H I 线和远紫外线（GALEX）调查，对孤立星系目录（KIG）中的 165 个早型星系进行了重新分类。结果，E 型和 S0 型星系的数量减少到 91 个。我们对早型 KIG 星系伴星的搜索显示，在 45 个宿主星系周围有 90 个伴星，具有视线速度差异\(\left| {dV } \right| < 500\) km s ^–1和线性投影间隔\({{R}_{p}} < 750\) kpc。我们没有发现与近邻的存在或不存在相关的星系的综合光度或颜色存在明显差异。我们发现 26 个系统“KIG 星系-伴星”的特征轨道质光比为\({{{{M}_{ \odot }}} \mathord{\left/ {\vphantom {{{{M}_{ \odot }}} {{{L}_{K}}}}} \right. \kern-0em} {{{L}_{K}}}} = {{(74 \pm 26){{M}_{ \odot }}} \mathord{\left/ {\vphantom { {(74 \pm 26){{M}_{ \odot }}} {{{L}_{ \odot }}}}} \right. \kern-0em} {{{L}_{ \odot } }}}\)，这与\({{{{M}_{{{\text{orb}}}}}} \mathord{\left/ {\vphantom {{{{M}_{ {{\text{orb}}}}}} {{{L}_{K}}}}} \right. \kern-0em} {{{L}_{K}}}}\)对早期的估计-2MIG 目录中的孤立星系类型 ( \({{63{{M}_{ \odot }}} \mathord{\left/ {\vphantom {{63{{M}_{ \odot }}} {{ {L}_{ \odot }}}}} \right. \kern-0em} {{{L}_{ \odot }}}}\) )，以及\({{{{M}_} {{{\text{orb}}}}}} \mathord{\left/ {\vphantom {{{{M}_{{{\text{orb}}}}}} {{{L}_{K }}}}} \right. \kern-0em} {{{L}_{K}}}}\)局部体积中 E 型和 S0 型星系的估计值：\(38 \pm 22\) (NGC 3115), \(82 \pm 26\) (NGC 5128), \(65 \pm 20\) (NGC 4594）。与平均\({{(20 \pm 3){{M}_{ \odot }}} \mathord{\left/ {\ vphantom {{(20 \pm 3){{M}_{ \odot }}} {{{L}_{ \odot }}}}} \right. \kern-0em} {{{L}_{ \ dot }}}}\) 无膨胀旋涡星系的比率表明早型和晚型星系的动态演化之间存在显着差异。