Exploring Galactic Quenching: A Comparative Analysis of Criteria and Insights into Quenching Mechanisms
Zi-Hua Ho1,2*, Li-Hwai Lin2, Hung-Yu Jian2, Bau-Ching Hsieh2, Carlos Lopez-Coba2
1Institution of Astronomy, National Tsing Hua University, Hsinchu, Taiwan
2Institution of Astronomy, Acdemic Sinica, Taipei, Taiwan
* Presenter:Zi-Hua Ho, email:qaz@gapp.nthu.edu.tw
Galaxy quenching is a messy phenomenon in galaxy evolution. Galaxy quenching is not only characterized by many factors, including galactic environment, intrinsic galaxy properties, and external events but also changes these factors. This coupled interplay makes it hard to determine the quenching process of a galaxy. Numerous researchers used various methods to study galaxy quenching. It is helpful to understand it, however, the different methods may lead to diverse conclusions. Because it involves the definition of quench, but there are many indexes for quench. Each of them has slight differences in physical interpretation, causing different quenching features. To give a unified well-defined definition of quench, we compare four common selection rules of quenched region by analyzing the Pipe3D pipeline from MaNGA DR17 datacubes. We found the quenched regions in different selection rules distributed diversely. Some do have a similar quenching feature in different selection rules but not for all galaxies. We further look into their environmental and intrinsic properties to obtain a comprehensive understanding of these findings. By integrating these factors into our investigation, we elucidate the nuanced relationship between quenching features and galaxy characteristics across different selection rules.
Keywords: galaxies, galaxy evolution, galaxy quenching