Leader: Joss Bland-Hawthorn
Email: jonathan.bland-hawthorn@sydney.net.au
Collaborators:
Thor Tepper-Garcia, postdoc
Li Iles, postdoc
Topic:
Inflows and outflows at large radius
The future fate of ram-pressure affected cluster galaxies
Abstract/Description:
The importance of lopsidedness in galaxies was first raised by Baldwin et al (1980). It can probe interactions with the environment or the unsettled nature of the baryons or dark matter. Most galaxies show signs of asymmetry, but 15-20% of galaxies are seriously lopsided (Reichard et al 2008). The case for what causes asymmetry is strengthened in the presence of kinematics, especially stellar motions. Baryon sloshing is particularly strong when gas is accreting from a hot halo, and the gas fraction is high. Since all galaxies go through a phase like this, the proposed project is very timely. Sloshing signatures can survive for billions of years, even in isolated galaxies. This is where Hector comes in, particularly in light of our new models. We have been developing Nexus models to explore the evolution of baryons settling in discs, as presented at Macquarie University, Sept 2024.
Status: under review by Science Committee
Needed data products:
fourier analysis of stellar surface brightness and stellar velocity maps;
HI single aperture measurements for all galaxies.
Publication date: 31/12/2024