The efficiency of star formation across the Epoch of Reionization

by Dr. Mauro Stefanon

Leiden

at Astrophysics and Cosmology Seminar

Wed, 03 Nov 2021, 11:10
Remote Zoom Seminar

Abstract

The epoch of re-ionization (approximately corresponding to 0.4-1Gyr of cosmic time) constitutes a key era for our understanding of the processes governing galaxy formation. In the last decade, the increased sensitivity of HST/WFC3 combined with Spitzer/IRAC coverage have enabled the identification of about 4000 galaxies in the first Gyr of cosmic time. These observations suggest an accelerated evolution of the cosmic star formation rate density at the earliest times, indicating that galaxy assembly experienced an extremely intense phase during the first ~650Myr years of cosmic time. However, while we have a fair understanding of the gravitational assembly of the dark matter halos which drive the accretion of cold gas, the baryonic processes controlling the transformation of gas into stars are still largely unknown. In this talk I will provide an overview of the most recent results about the characterization of galaxies populations in the early universe and what we can infer about the relationship between the formation of stars and the accretion of their host dark matter halos.

Created on 01-11-2021 by Zitrin, Adi (zitrin)
Updaded on 01-11-2021 by Zitrin, Adi (zitrin)