List of Past Astronomy Colloquia : 01-Jan-1998 to 01-Jun-1998


Date:   Wednesday 4-Feb-98
Speaker:   Dr. Neta Bahcall (Princeton University)
Title:  "A Lightweight Universe?"


Date:   Wednesday 11-Feb-98
Speaker:   Dr. Nick Gnedin (U.C. Berkeley)
Title:  "Cosmological Hydrodynamics: Playing with the Universe"


Date:   Wednesday 18-Feb-98
Speaker:   Dr. Howard E. Bond (Space Telescope Science Institute)
Title:  "Post-AGB Stars in the Halos of Nearby Galaxies"


Date:   Wednesday 25-Feb-98
Speaker:   Dr. Dale Frail (National Radio Astronomy Observatory)
Title:  "Shock Excited Maser Emission From Supernova Remnants"


Date:   Monday 2-Mar-98
Speaker:   Dr. Tom Quinn (University of Washington) **Note Date and Room**
Title:  "The Structure of Galaxy Clusters in a CDM Universe"


Date:   Wednesday 4-Mar-98
Speaker:   Dr. James Klimchuck (U.S. Naval Observatory)
Title:  "Structure and Heating of Coronal Loops"


Date:   Tuesday 10-Mar-98
Speaker:   Dr. Stacey McGaugh (Rutgers University) **Note Date and Time**
Title:  "How Galaxies Don't Form"

Observations of low surface brightness disk galaxies show them to be very dark matter dominated. The luminous material is only a small fraction of the total mass, so the inferred density structure of the dark matter halo is not subject to the disk-halo degeneracy which affects brighter galaxies. This makes low surface brightness galaxies ideal laboratories for testing theories of galaxy formation.

"All we know so far is what doesn't work" - Richard Feynman


Date:   Wednesday 11-Mar-98
Speaker:   **** NO WEDNESDAY COLLOQUIUM THIS WEEK ****
Title:  *** See Tuesday and Thursday Schedules ***


Date:   Thursday 12-Mar-98
Speaker:   Dr. Michael Rauch (California Institute of Technology) **Note Date and Room**
Title:  "QSO Absorption Systems - The Signature of High Redshift Structure Formation?"

QSO absorption systems have been known for more than three decades, but it is only now that we are beginning to decipher the observational properties and understand their relation to high redshift structure formation. I will briefly review some theoretical results and then focus on what recent observations tell us about the intergalactic medium and high redshift galaxy formation. I will argue that metal absorption systems are giving us the first glimpse of the typical galaxy population at redshifts ~3 and beyond.


Date:   Wednesday 18-Mar-98
Speaker:   No Colloquium this week
Title:  


Date:   Wednesday 25-Mar-98
Speaker:   ** No Colloquium -- Spring Break **
Title:  


Date:   Wednesday 1-Apr-98
Speaker:   Dr. Steve Lubow (Space Telescope Science Institute)
Title:  "Interactions of Binary Stars and Planets with Disks"


Date:   Wednesday 8-Apr-98
Speaker:   Dr. Mark Heyer (FCRAO, University of Massachusetts)
Title:  "The Perseus Spiral Arm of the Galaxy"


Date:   Wednesday 15-Apr-98
Speaker:   Dr. Steve Snowden (GSFC)
Title:  "The 1/4 keV Sky, from the Solar Neighborhood to the Virgo Cluster"


Date:   Wednesday 22-Apr-98
Speaker:   Dr. Vera Rubin (Carnegie Institution of Washington)
Title:  "Disk Galaxies with Complex Kinematics"


Date:   Wednesday 29-Apr-98
Speaker:   Dr. Zhi-Yun Li (University of Virginia)
Title:  "Cores, Jets and Bipolar Outflows in Star Formation"


Date:   Wednesday 6-May-98
Speaker:   Dr. Ewine van Dishoeck (Leiden University)
Title:  "ISO's View on the Interstellar Medium and Star Formation"


Date:   Wednesday 13-May-98
Speaker:   Dr. Jill Tarter (SETI Institute)
Title:  "SETI: Science Fact, Not Fiction"


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