Relating stellar populations & kinematics to environment

The goals of the completed SAMI galaxy survey and the new Hector galaxy survey are to use integral field spectroscopy to provide spatially resolved spectra for thousands of galaxies to better answer some key questions:

  • What is the physical role of environment in galaxy evolution?
  • What is the relationship between stellar mass growth and angular momentum development in galaxies?
  • How does gas get into and out of galaxies, and how does this drive star formation?

This research projectwill connect integral field spectroscopy from the existing SAMI https://sami-survey.org/ survey and the new Hector https://aat.anu.edu.au/technology/new-instruments/hector survey with other multi-wavelength and environmental data sets. It will use the 6dFGS http://www.6dfgs.net/ redshift and peculiar velocity survey, the eROSITA https://www.mpe.mpg.de/eROSITA X-ray survey, and the WALLABY https://www.atnf.csiro.au/research/WALLABY/ HI survey to define physically motivated measures of environment and relate these to the resolved stellar populations and stellar kinematics of the thousands of galaxies observed by SAMI and Hector in order to understand how environmental factors affect the evolution of galaxies and what are the physical processes involved. The image below illustrates how integral field spectroscopy allows us to relate the stellar kinematics within galaxies (the complex internal motions of their stars) to their total masses (determined dynamically) and their stellar population properties (such as metallicity, the ratio of heavy elements to hydrogen).

See this link https://www.dropbox.com/s/odmrkfd657ry3ze/Colless_Student_Project_2021-2.pdf?dl=0 for more details of this project. The project is intended for a PhD student, but parts of the project are suitable for Honours or Masters students.