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X-WR-CALNAME;VALUE=TEXT:Galaxies & Cosmology Seminar - Mohammad Safarzadeh (ASU)
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SUMMARY:Galaxies & Cosmology Seminar - Mohammad Safarzadeh (ASU)
DESCRIPTION:Title : r-process enrichment of the lightest galaxies by fast merging neutron star binaries<div>	 </div><div>	Abstract: The recent aLIGO/aVirgo discovery of the gravitational wave from the neutron star merger (NSM) GW170817, </div><div>	and the follow up kilonova observations have shown that NSMs produce copious amount of r-process material.</div><div>	Assuming neutron star mergers are the dominant sources of r-process elements in the universe, </div><div>	 we study the chemical evolution of the Milky Way and ultra faint dwarf (UFD) galaxies through a novel set of zoom cosmological simulations.</div><div>	Our results indicate that fast merging channels of neutron star binaries are required in order to explain the observed statistics of </div><div>	the r-process enriched UFDs and metal poor r-process enhanced stars in the MW's halo. </div><div>	Moreover, in order to explain the r-process UFDs statistics, these systems should have lost a significant fraction of their stellar mass. </div><div>	Two candidate fast merging channels for the NSBs would be: </div><div>	(i) those on highly eccentric orbits, and (ii) those assembled through case BB unstable mass transfer.</div><div>	I will discuss the implications of each of these two channels. </div>
LOCATION:Phillips
STATUS:CONFIRMED
DTSTART:20180904T160000Z
DTEND:20180904T170000Z
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