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SUMMARY:The first stars: window to cosmic dawn - Piyush Sharda (Leiden)
DTSTART:20250404T103000Z
DTEND:20250404T113000Z
UID:TALK228166@talks.cam.ac.uk
CONTACT:Sandro Tacchella
DESCRIPTION:The era of cosmic dawn began with the first stars that formed 
 in the Universe a mere 200 - 300 million years after the Big Bang. These s
 tars produced the first supernovae and black holes\, enriched the interste
 llar medium (ISM) with metals\, were the building blocks of the first gala
 xies\, and significantly contributed to cosmic reionization. However\, com
 pared to star formation and feedback in metal-rich environments today\, th
 e lack of direct observations at low metallicities as well as high redshif
 ts has posed a significant challenge for understanding the physics behind 
 their formation and evolution. In this talk\, I will introduce POPSICLE\, 
 a new framework for high resolution simulations that caters to star format
 ion and feedback in low metallicity ISM reminiscent of redshift > 10 galax
 ies. I will describe how incorporating the full spectrum of ISM physics co
 upled to stellar evolution is crucial to constrain the stellar initial mas
 s function (IMF) and feedback in such environments. I will particularly fo
 cus on Population III stars\, and discuss their potential as seed black ho
 les in the early Universe. I will conclude by showcasing the capability of
  GPU-accelerated simulations to revolutionize our understanding of the ast
 rophysics of cosmic dawn\, and to bring theory at par with state of the ar
 t observations from JWST.
LOCATION:Ryle Seminar Room\, KICC + online
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