论文标题
具有恒星反旋转现象的星系的详细研究
Detailed study of galaxies with the stellar counter-rotation phenomenon
论文作者
论文摘要
银河圆盘生长的过程仍未完全了解。在大多数磁盘星系中，气体和恒星位于同一平面，并沿相同的方向旋转。但是，有运动学上奇特的星系，可容纳两个反旋转恒星盘。据信它们的起源是过去发生气体随后发生恒星形成的事件的结果。通过研究此类星系，我们可以学习落在祖细胞星系上的材料，何时以及如何属于。我们在漫画IFU调查中确定了56个反向旋转星系的样本，并在6-M望远镜（BTA）启动了后续观察活动，旨在确定两张恒星光盘的恒星人口特性。我们的初步结果表明，反旋转星系样品的二分法。我们发现，大多数巨大的星系具有扩展的反向旋转磁盘，其对光度的贡献高于在质量较小的星系中提出不同进化路径的质量。
The process of galactic disc growing is still not fully understood. In the majority of disk galaxies the gas and stars are located in the same plane and rotate in the same direction. However, there are kinematically peculiar galaxies hosting two counter-rotating stellar discs. Their origin is believed to be the result of a past event of accretion of gas followed by star formation. By studying such galaxies we can learn how much material, when, and how, have fallen onto the progenitor galaxy. We identified a sample of 56 counter-rotating galaxies in the MaNGA IFU survey and initiated a follow-up observing campaign at the 6-m telescope (BTA) aiming to determine the stellar population properties of both stellar discs. Our preliminary results suggest the dichotomy of the sample of counter-rotating galaxies. We found that most massive galaxies have extended counter-rotating disks, whose contribution to luminosity is higher than in the less massive galaxies suggestive of different evolutionary paths.
