Department Colloquium

Other Events

Contact

Physics & Astronomy Department
Vanderbilt University
PMB 401807
2401 Vanderbilt Place
Nashville, TN 37240-1807

Phone: 
Fax: 
Email: 
(615) 322-2828
(615) 343-7263
physics-astronomy

Physics and Astronomy Colloquium, 2014-2015

Colloquia are held on Thursdays at 3PM in room 4327 (building 4) of the Stevenson Science Center unless otherwise noted. Click here for directions, or phone the department. A reception with the speaker is held at 2:30pm in Stevenson 6333.

Show all abstracts. Hide all abstracts.

Fall 2014

Thursday, September 4

Host:

Thursday, September 11---FORMAN LECTURE

Rhett Allain, Department of Chemistry and Physics, Southeastern Louisiana University

   (show abstract)

Host:

Thursday, September 18

Kate Scholberg, Department of Physics, Duke University

Neutrinos   (show abstract)

Host: David Ernst

Thursday, September 25

Marcelo Gleiser

Physics of the Early Universe   (show abstract)

Host: R. Scherrer

Thursday, October 2

David Snoke

   (show abstract)

Host: R. Scherrer

Thursday, October 9

   (show abstract)

Host:

Thursday, October 16---Fall Break

   (show abstract)

Host:

Thursday, October 23

   (show abstract)

Host:

Thursday, October 30

William C. Keel, Department of Physics and Astronomy, University of Alabama, Tuscaloosa

Citizen Science, Giant Ionized Clouds, and the History of Galactic Nuclei   (show abstract)

The signature discovery of the Galaxy Zoo citizen-science project has been Hanny's Voorwerp, a galaxy-sized gas cloud ionized by a quasar which has faded so rapidly that we no longer see it when observing the galaxy nucleus directly. Project participants have helped find a sample of 20 similar objects, giving our first look at the history of active galactic nuclei on timescales from 30,000-120,000 years. About 40% of these clouds require much more energy input thanthe nuclear source can provide, indicating that dramatic variability of active nuclei is common on these timescales. This is faster than simple models indicate for accretion disk changes; signs of gaseous outflow and triggered star formation may mean that the rate of accretion itself is changing less strongly than its byproducts, switching to kinetic rather than radiative-energy dominance. Current surveys show similar cases in both high- and low-power regimes; our snapshot of the population of accreting supermassive black holes will be incomplete without including these faded objects.

Host: K. Holley-Bockelman

Thursday, November 6---HOLLADAY LECTURE

Rene Lopez, Department of Physics and Astronomy, University of North Carolina, Chappel Hill

Optical Materials   (show abstract)

Host: R. Haglund

Thursday, November 13

H. Gau

   (show abstract)

Host: S. Patelides

Thursday, November 20

   (show abstract)

Host:

Thursday, December 5

   (show abstract)

Host:

Spring 2015

Thursday, January 8

   (show abstract)

Host:

Thursday, January 15

   (show abstract)

Host:

Thursday, January 22

   (show abstract)

Host:

Thursday, January 29

   (show abstract)

Host:

Thursday,February 5

   (show abstract)

Host:

Thursday,February 12

   (show abstract)

Host:

Thursday,February 19

   (show abstract)

Host:

Thursday,February 26

   (show abstract)

Host:

Thursday, March 5

   (show abstract)

Host:

Thursday, March 12

   (show abstract)

Host:

Thursday, March 19

   (show abstract)

Host:

Thursday, March 26---FORMAN LECTURE

Chad Orzel, Department of Physics and Astronomy, Union College

   (show abstract)

Host:

Thursday, April 2

   (show abstract)

Host:

Thursday, April 9

   (show abstract)

Host:

Thursday, April 16

   (show abstract)

Host:

Thursday, April 23

   (show abstract)

Host:

Copyright 2010, Vanderbilt University