This is a talk held during the regular colloquium series (usually Tuesdays at 4pm).

The origins of type Ia supernovae (and what does Darwin have to do with it)

Tuesday, November 12, 2019 - 11:00am
Prof. Hagai Perets (IIT)

Type Ia supernovae (SNe) are thought to originate from the thermonuclear explosions of carbon-oxygen (CO) white dwarf (WD) stars. They produce most of the iron-peak elements in the universe, and bright type Ia SNe serve as important “standard candle” cosmological distance indicators.

How fast is the universe growing?

Tuesday, October 29, 2019 - 11:00am
Prof. Jo Dunkley (Princeton)

There is currently a tension between various measurements of the expansion rate of the universe. I will give a recap of this issue, and talk about how we use the Cosmic Microwave Background, our most distant observation, to infer the local expansion rate of space.


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