Date: Wednesday, November 6,

Time: 1:30 pm (refreshments at 1:00)

Place: Rose Room (rm. 336), Memorial Union

The talk will be technical, but it should be accessible to undergraduates with a strong scientific background.

Here is the abstract of Dr. Henriksen's talk:

X-ray imaging observations of clusters of galaxies over the past decade have shown that many possess spatial structure suggesting that clusters form from the merger of subclusters. Kinematical data of the galaxies themselves is utilized, along with X-ray spectra and images, to determine the physical environment of the merger. Preliminary results of computer simulations of the effect of the merger on the evolution of disk galaxies in these structures suggests that they will show enhanced star formation from cloud-collisions within their own disk. This effect might add to the rapid evolution of galaxies in clusters observed during the last 5 billion years.