New Axion Analysis

November 28th, 2005

photon-axion mixing

A cartoon of photons leaving a supernova, partially converting to axions, and the axions passing through the Earth.

There is a new analysis by Yong-Seon Song and Wayne Hu of photon-axion oscillations using data from Type IA supernovae, the Wilkinson Microwave Anisotropy Probe, and baryon oscillations in the density power spectrum seen by Sloan Digital Sky Survey.  They find that while photon-axion oscillations cannot explain supernova dimming in the absence of dark energy, photon-axion oscillations with dark energy are preferred by the data over a cosmological constant. For more background on photon-axion oscillations click here.