I am a Professor of Astrophysics at the Dunlap Institute in the Department of Astronomy and Astrophysics at the University of Toronto in Canada.
Tel: +1 (416) 978-4971
Email: hlozek at dunlap dot
utoronto do ca
Baryon Acoustic Oscillations (BAO) provide a cosmological "standard ruler" with which we can measure both distances in and the expansion of the universe, at different cosmic times. I am interested in the use of BAO to constrain and test our model of the universe, and methods of extracting the signal from both spectroscopic and photometric galaxy surveys.
The figure below shows a toy model of the BAO - characteristic 'rings' in the distrbution of matter in the universe. The characteristic scale of the rings is detected by the wavelength of the oscillations in the power spectrum (top right panel).
A recent review chapter on Baryon Acoustic Oscillations for the book Dark Energy Ed. Pilar Ruiz-Lapuente, Cambridge University Press (2010). Slides based on the review can be found here.