July 31, 2017 to August 4, 2017
Fermi National Accelerator Laboratory
US/Central timezone

Emission of Photons and Relativistic Axions from Axion Stars

Jul 31, 2017, 3:00 PM
Hornets Nest (Fermi National Accelerator Laboratory)

Hornets Nest

Fermi National Accelerator Laboratory

Presentation Dark Matter Dark Matter


Mr Abhishek Mohapatra (The Ohio State University)


The number of nonrelativistic axions can be changed by inelastic reactions that produce relativistic axions or photons. Any even number of nonrelativistic axions can scatter inelastically into two relativistic axions. Any odd number of axions can annihilate into two photons. This reaction produces a monochromatic radio-frequency signal at an odd-integer harmonic of the fundamental frequency set by the axion mass.The loss rates of axions from axion stars through these inelastic relations are calculated using the framework of a nonrelativistic effective field theory. Odd-integer harmonics of a fundamental radio-frequency signal provide a unique signature for collapsing axion stars or any dense configuration of axions.

Primary authors

Mr Abhishek Mohapatra (The Ohio State University) Eric Braaten (Ohio State University) Dr Hong Zhang (The Ohio State University)

Presentation materials