YCAA Seminar – Mia Bovill

Event time: 
Tuesday, October 10, 2017 - 2:30pm
Speaker: 
  • Mia Bovill
Speaker Institution: 
  • STScI
Talk Title: 
Implications for Pop III Galaxies in the JWST Era
Event description: 

A quantitative understanding of the first stars and their host halos is a driving force behind high redshift astronomy. In the absence of extreme gravitational lensing, the first Pop III stars at z>20 will be beyond the reach of even JWST. However, these Lyman Warner background generated by these first stars will surpress star formation, and metal enrichment in later forming halos. In the presence of this Lyman Warner, a subset of halos which cross the HI cooling threshold at late times (z<15) contain large reservoirs of primordial metallicity gas. These halos are host sites for either ~10^4 M_solar Pop III clusters, more than two orders of magnitude brighter than the higher z counterparts in mini halos, or ~10^5 M_solar direct collapse black holes. These Pop III galaxies would be detectable by JWST. I will present predictions for the number, distribution and detectability of these ”late” forming Pop III galaxies.

A quantitative understanding of the first stars and their host halos is a driving force behind high redshift astronomy. In the absence of extreme gravitational lensing, the first Pop III stars at z>20 will be beyond the reach of even JWST. However, these Lyman Warner background generated by these first stars will surpress star formation, and metal enrichment in later forming halos. In the presence of this Lyman Warner, a subset of halos which cross the HI cooling threshold at late times (z<15) contain large reservoirs of primordial metallicity gas. These halos are host sites for either ~10^4 M_solar Pop III clusters, more than two orders of magnitude brighter than the higher z counterparts in mini halos, or ~10^5 M_solar direct collapse black holes. These Pop III galaxies would be detectable by JWST. I will present predictions for the number, distribution and detectability of these ”late” forming Pop III galaxies.

Location: 
Watson Center A-51 See map
60 Sachem Street
New Haven, CT 06511