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TAPIR Seminar

Friday, December 6, 2013
2:00pm to 3:00pm
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Cahill, Hameetman Auditorium
Investigations on the gaseous environment of distant galaxies
Michele Fumagalli, Hubble Postdoctoral Fellow, Carnegie Observatories, Princeton University,

The evolution of high-redshift galaxies is regulated by the balance between the inflow of fresh fuel that is required to form new stars and the outflow of metal-polluted material that is ejected from star-forming regions. For this reason, the circumgalactic medium between galaxy disks and the intergalactic medium has been recognized as one of the most fundamental components in a galaxy. In this talk, I will discuss recent progress at the interface between theory and observations to characterize the gaseous environment of distant galaxies. I will focus on the emergent theoretical picture according to which galaxies at high redshifts are fed by extended streams of cold gas in a smooth component and in merging satellites. I will compare and contrast the findings of numerical simulations with observations of high-redshift galaxies and I will discuss the prospects of mapping the circumgalactic medium with absorption line systems, presenting results from recent and ongoing observations.

For more information, please contact JoAnn Boyd by phone at 4280 or by email at joann@caltech.edu.