Click here for a printable version of this page.
Friday, September 10, 2004
Physics Building, Room 204
Note special time.
[Host: Peter Arnold]
University of Virginia Astronomy
"Primal Scream- Sounds From the Infant Universe"
Cosmology's extraordinary development shows no signs of slowing down. With
the evolution of the Universe's average properties now fairly well
understood, the focus has switched to the evoution of perturbations -- how
an extremely smooth infant Universe changes into an extremely lumpy old
Universe, with galaxies strewn to the horizon. Remarkably, the roots of
present day structure can be traced back to sound waves in the early
Universe. Even more remarkable, the power spectrum of the sound shows a
fundamental and harmonics, as if the Universe were a kind of primitive
musical instrument. This talk aims to unpack the relatively new subject
of "Big Bang Acoustics", using reproductions of the primordial sound as a
vehicle for discussing the physics of that remote time. It turns out
that, as with many vibrating objects, the nature of the sound reveals much
about the nature of the object as well as the nature of the stimulus.
To add a speaker, send an email to
Please include the seminar type (e.g. Colloquia), date, name of the speaker, title of talk, and an abstract (if available).