Some Secular Drivers of Galaxy Evolution

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Date/Time:Friday, 18 Jan 2013 from 4:10 pm to 5:00 pm
Location:Room 3
Contact:Massimo Marengo
Phone:515-294-2958
Channel:Astronomy
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Research talk by Curt Struck, ISU Physics & Astronomy Department faculty.

The chief drivers of galaxy evolution are currently believed to be mergers and cold accretion. I will describe the work of my group and others on the roles of several processes in disk galaxy evolution, whose actions occur on relatively long time scales. These include the effects of: fall-back from long tidal tails, weak tidal spirals in high Toomre Q disks, and of waves induced by ram pressure compression of a disk. The first of these is similar to cold accretion, and may teach us about how that process works at high redshift. The second teaches us about the effects of weak or fast tidal encounters, and the last has hardly begun to be studied.