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VERSION:2.0
CALSCALE:GREGORIAN
PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:0
UID:UW-Physics-Event-4388
DTSTART:20170117T213000Z
DURATION:PT1H0M0S
DTSTAMP:20260419T060551Z
LAST-MODIFIED:20170118T022147Z
LOCATION:5280 Chamberlin
SUMMARY:The Fate of Axion Stars\, Theory Seminar (High Energy/Cosmolog
 y)\, Hong Zhang\, Ohio State
DESCRIPTION:If the dark matter consists of axions\, some of it will co
 ndense into axion stars\, which are gravitationally bound Bose-Einstei
 n condensates of axions. If an axion star accretes enough axions to ex
 ceed a critical mass\, it will collapse. The fate of a collapsing axio
 n star has not been established. One possibility for the remnant is a 
 much denser axion star in which the attractive forces of gravity and a
 xion pair interactions are balanced by the mean-field pressure of the 
 axion Bose-Einstein condensate. A nonrelativistic effective field theo
 ry for axions can provide insights into the fate of axion stars. The c
 ollapsing process of axion stars and the possible denser remnant produ
 ce unique monochromatic radio-frequency signals at odd-integer harmoni
 cs of the fundamental frequency set by the axion mass. 
URL:https://www.physics.wisc.edu/events/?id=4388
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