Low Surface Brightness Galaxy catalogue selected from the alpha.40-SDSS DR7 Survey and Tully-Fisher relation
Low Surface Brightness Galaxy catalogue selected from the alpha.40-SDSS DR7 Survey and Tully-Fisher relation
复制标题
从 alpha.40-SDSS DR7 巡天和 Tully-Fisher 关系中选择的低表面亮度星系目录
DOI：
10.1093/mnras/sty2976
复制
发表时间：
2019
影响因子：
4.8
通讯作者：
Wang Yougang
中科院分区：
文献类型：
--
作者：
Du Wei;Cheng Cheng;Wu Hong;Zhu Ming;Wang Yougang
本文给出了从α.40-SDSS DR 7巡天中搜索到的1129个低表面亮度星系（LSBG）的高选择样本的星表。这个样本，包括各种类型的星系的光度和形态，扩大了参数空间所涵盖的现有LSBG样本。基于从我们的整个LSBG样本中选择的173个LSBG的子样本，其具有Hiline轮廓的2-喇叭形状，短轴与长轴比（B/a）小于0.6并且Hi检测的信噪比大于6.5，我们研究了LSBG在光学B、g和r波段以及近红外（NIR）J、H和K波段的Tully-Fisher关系（TFr）。在光学波段，LSBG子样本遵循以前为正常螺旋星系定义的基本TFr。在近红外波段，我们的LSBG子样本的TFRS是略有不同的TFRS的正常明亮的星系。这可能是由于内部灭绝的问题。此外，我们的LSBG子样品的质光比（M/L），圆盘刻度长度（h），和质量表面密度（）推导出的光学TFr的结果。与高表面亮度星系（HSBGs）相比，我们的LSBGs具有更高的M/L，更大的h，和更低的HSBGs。
We present a catalogue of an Hi-selected sample of 1129 low surface brightness galaxies (LSBGs) searched from the α.40-SDSS DR7 survey. This sample, consisting of various types of galaxies in terms of luminosity and morphology, has extended the parameter space covered by the existing LSBG samples. Based on a subsample of 173 LSBGs that are selected from our entire LSBG sample to have the 2-horn shapes of the Hiline profiles, minor-to-major axial ratios (b/a) less than 0.6 and signal-to-noise ratio of Hidetection greater than 6.5, we investigated the Tully–Fisher relation (TFr) of LSBGs in the opticalB, g, andrbands and near-infrared (NIR)J, H, andKbands as well. In optical bands, the LSBG subsample follows the fundamental TFr that was previously defined for normal spiral galaxies. In NIR bands, the TFrs for our LSBG subsample are slightly different from the TFrs for the normal bright galaxies. This might be due to the internal extinction issue. Furthermore, the mass-to-light ratio (M/L), disc scale length (h), and mass surface density () for our LSBG subsample were deduced from the optical TFr results. Compared with high surface brightness galaxies (HSBGs), our LSBGs have higherM/L, largerh, and lowerthan HSBGs.