Galactic Ecology: Where Have All the Baryons Gone?
December 1, 2016
GOS - 1250
Galaxies are surprisingly deficient in normal matter. Compared to the universe as a whole, the ratio of normal matter to dark matter is low in galaxies. Recent work strongly suggests that these missing baryons reside in a diffuse gas surrounding galaxies. Professor Martin will describe why astrophysicists believe this halo gas is very dynamic. She will present the latest results on measurements of gas flows between galaxies and this circumgalactic medium. The results have important implications for how the star formation rate in galaxies is regulated as well as the enrichment history of interstellar and intergalactic gas.
For more information, the event coordinator is Dr. Sukanya Chakrabarti.