Theory Seminar (High Energy/Cosmology) |
Events During the Week of January 15th through January 22nd, 2017
Monday, January 16th, 2017
- No events scheduled
Tuesday, January 17th, 2017
- The Fate of Axion Stars
- Time: 3:30 pm
- Place: 5280 Chamberlin
- Speaker: Hong Zhang, Ohio State
- Abstract: If the dark matter consists of axions, some of it will condense into axion stars, which are gravitationally bound Bose-Einstein condensates of axions. If an axion star accretes enough axions to exceed a critical mass, it will collapse. The fate of a collapsing axion star has not been established. One possibility for the remnant is a much denser axion star in which the attractive forces of gravity and axion pair interactions are balanced by the mean-field pressure of the axion Bose-Einstein condensate. A nonrelativistic effective field theory for axions can provide insights into the fate of axion stars. The collapsing process of axion stars and the possible denser remnant produce unique monochromatic radio-frequency signals at odd-integer harmonics of the fundamental frequency set by the axion mass.
- Host: Josh Berger
Wednesday, January 18th, 2017
- No events scheduled
Thursday, January 19th, 2017
- No events scheduled
Friday, January 20th, 2017
- No events scheduled