arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2602.14873astro-ph.GA
收藏

SDSS中双星系中杆分数的减少

Reduction of bar fraction in paired galaxies in the SDSS

Hebei Normal University(河北师范大学);Shijiazhuang Key Laboratory of Astronomy and Space Science / Guoshoujing Institute of Astronomy, Hebei Normal University(石家庄天文与空间科学重点实验室/郭守敬天文台,河北师范大学);Hebei Key Laboratory of Photophysics Research and Application(河北省光物理研究与应用重点实验室);Shanghai Astronomical Observatory, Chinese Academy of Sciences(中国科学院上海天文台);Shanghai Key Lab for Astrophysics(上海市天体物理重点实验室);Department of Astronomy, School of Physics and Astronomy, Shanghai Jiao Tong University(上海交通大学物理与天文学院天文学系);State Key Laboratory of Dark Matter Physics, Tsung-Dao Lee Institute & School of Physics and Astronomy, Shanghai Jiao Tong University(上海交通大学物理与天文学院及李政道研究所暗物质物理全国重点实验室)

Linlin Li, Shuai Feng, Shiyin Shen, Qi'an Deng, Ying Zu, Wenyuan Cui

AI总结:

SDSS中双星系的杆分数减少表明潮汐相互作用抑制了杆结构,尤其在重大合并中影响显著。

摘要:

我们利用SDSS数据研究双星系中的杆分数,以评估星系相互作用如何影响杆结构。与孤立星系相比,近距离双星系在投影分离度小于25kpc范围内显示出显著降低的杆分数。这种降低几乎完全由表现出明显合并或扰动特征的系统驱动,表明潮汐相互作用会抑制杆结构。下降主要由弱杆分数的减少引起,而强杆的比例基本保持不变。杆抑制主要与重大合并有关,并在大质量宿主星系中最强。对于小质量bulge的巨质量星系,仅在次要合并中检测到较弱但统计显著的抑制。相比之下,没有发现双星系成员之间相对取向对杆抑制的显著影响。这些发现提供了观测证据,表明重大合并中的潮汐扰动在调节杆演化中起关键作用。

英文摘要:

We investigate the bar fraction in galaxy pairs from the SDSS to assess how galaxy interactions affect bar structures. Compared to isolated galaxies, close pairs exhibit a significantly reduced bar fraction at projected separations within 25 kpc. This reduction is driven almost entirely by systems showing clear merger or disturbance signatures, indicating that tidal interactions suppress bars. The decline is dominated by a decrease in weak bars, while the fraction of strong bars remains largely unchanged. Bar suppression is primarily associated with major mergers and is strongest in massive host galaxies. A weaker but statistically significant suppression is detected in minor mergers only for massive galaxies with small bulges. In contrast, no significant dependence of bar suppression on the relative orientation between pair members is found. These findings provide observational evidence that tidal perturbations in major mergers play a key role in regulating bar evolution.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑