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<< April 2015 >>

Thursday, April 2, 2015

Testing General Relativity with the Event Horizon Telescope

Colloquium: Astronomy Colloquia | April 2 | 4:10 p.m. | 1 LeConte Hall


Dimitrios Psaltis, University of Arizona

Department of Astronomy


The Event Horizon Telescope will generate the first images of the shadows of the black holes in the Milky Way and in M87. The observed mm photons will have originated in two of the strongest gravitational fields found in the Universe, encoding during their travel to the Earth the properties of the black-hole spacetimes. In this talk, I will discuss the prospect of performing a new tests of...   More >

Thursday, April 9, 2015

Pre-supernova Evolution and the Fates of Massive Stars

Colloquium: Astronomy Colloquia | April 9 | 4:10 p.m. | 1 LeConte Hall


Nathan Smith, University of Arizona

Department of Astronomy


A confluence of recent observations in the past decade have indicated that some basic assumptions that have guided our understanding of massive stars are not correct. On the one hand, models for single massive star evolution seem to have overestimated the effects of mass loss through winds and the influence of rotation. On the other hand, observations have shown that a large fraction of massive...   More >

Thursday, April 16, 2015

Star Formation and Molecular Gas in the first three billion years

Colloquium: Astronomy Colloquia | April 16 | 4 p.m. | 1 LeConte Hall


Daniel Marrone, University of Arizona

Department of Astronomy


In the first few Gyr of cosmic history, the bulk of the stellar mass was assembled under conditions of higher density and lower metallicity than we observe locally. While the most advanced optical/IR facilities have provided very detailed studies of galaxies at z~2-5 and detections of rare galaxies at in the epoch of reionization, it continues to be extremely difficult to study the cool phase of...   More >

Thursday, April 23, 2015

Astronomy Colloquium

Colloquium: Astronomy Colloquia | April 23 | 4 p.m. | 1 LeConte Hall


Paul Goldsmith, JPL

Department of Astronomy

Thursday, April 30, 2015

Astronomy Colloquium

Colloquium: Astronomy Colloquia | April 30 | 4 p.m. | 1 LeConte Hall


Ruth Murray-Clay, UCSB

Department of Astronomy