`Unveiling the Mysteries of the Leo Ring'
Monday November 7 Brown Hall 261 4 PM
Dr. Mark Giroux (East Tennessee State
`Unveiling the Mysteries of the Leo
Over twenty-five years ago a gigantic ring of neutral hydrogen gas
was found in the region of the constellation Leo.
The ring has a diameter of over
six hundred thousand light years and has a mass two billion times
that of the Sun.
At the time this ring was the
subject of speculation about its origins-is it the remnant of a
tidal interaction between nearby galaxies, or is it primordial gas
left over from the formation of these galaxies?
Despite the passage of
twenty-five years and numerous additional observations, the Leo
Ring's origins remain unknown.
We have obtained Hubble Telescope
data which we hope to use to resolve this mystery, and I will
report on the present state of our knowledge.
Refreshments will be served at 3:45