Oral Presentation

Temporally resolving early galaxies: pinning down the internal workings of galaxies with star-formation variability

Author(s): Sandro Tacchella (UNIST)

Presenter: Sandro Tacchella (UNIST)

The unknown physics of star formation and feedback represent the main uncertainty in our understanding of galaxy formation. In my talk, I will show from analytical and numerical considerations how different physical processes that act within and outside of galaxies shape the variability of star formation. On long timescales, star formation is mainly regulated by the accretion rate of baryons and regulated by the large-scale environment of the galaxies. On the other hand, the variability of star formation on short timescales is related to the gas cycling through the galaxy and the star formation process itself. I will discuss how ATLAS has the potential – by providing spectroscopy for millions of galaxies – to shed new light on the molecular lifecycle of high-redshift galaxies by constraining short-term variability of star formation through combining different star-formation rate indicators based on emission lines and broadband photometry.