Polar ring galaxies (PRGs) exhibit an extendedring of material oriented perpendicular to the main disk, which provide crucialclues for galaxy evolutionand dynamics, such as galaxy interaction and gas accretion. In the WALLABY Pilot Data Release 1, we found two potential polar ring galaxies: NGC 4632 and NGC 6156. We used the iDaVIE virtual reality software todecompose gas within the disk and ring and generate 3D kinematical models to deeply investigate gas kinematics. The results show that these two galaxies are PRG candidates. Combined withmock datacubes, we consider the effects ofmain disk inclinations, ring orientations, and angular resolutions and imply a PRGs incidence rate of∼1%−3%. Thus the future WALLABY surveywill detect hundreds of new polar ring galaxies, which could further constrain the intrinsic properties and physical origins of PRGs.
https://ui.adsabs.harvard.edu/abs/2023arXiv230905841D/abstract
BIO
Niankun Yu's main research interests are galaxy formation and evolution, baryon cycle, star formation, gas kinematics and dynamics. She is one of the members of the CRAFTS and WALLABY surveys.
2022-present: post-doc, NAOC-ISM, Beijing, China. Main collaborators: Chao-Wei Tsai, Zheng Zheng, Jingwen Wu, Di Li.
2016–2022 PhD, Astrophysics, Peking University, Beijing, China. Advisors: Luis C. Ho, Jing Wang
2012–2016 Bachelor, Physics, Huazhong University of Science and Technology, Wuhan, China. Advisor: Qingwen Wu
