[Astro] Lunch Talk

[Harry Gully]

Hi everyone,

This week's lunch talk will be given by Tom de Lisle, the title and abstract of the talk are below:

Investigating Post-Starburst Galaxies with JWST: The Missing Link?
I will present new ultra-deep imaging from the James Webb Space Telescope (JWST), which we are using to answer the question of how and why star formation shuts off in galaxies. To do this, we study a class of galaxies that recently underwent this transformation, known as post-starburst galaxies (PSBs). Previous research has found an excess of low mass PSBs at z < 1.5, believed to be caused by environmental quenching, however this excess has yet to be seen at higher redshifts. With the increased depth of JWST, we can extend our analysis to unprecedentedly lower masses across cosmic time, allowing us to determine whether the upturn at the low mass end of the PSB mass function occurs exclusively at lower redshifts. In this talk I will present preliminary mass functions made using JWST data for star-forming, quiescent and PSB populations, in addition to exploring what this could mean for the quenching routes and timescales of PSBs.

Thanks,
Harry.
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