Monday, November 1, 2010

Session II

Star formation in massive galaxies

  • triggering (including environmental effects, AGN, mergers, etc.)
  • duty cycles, efficiencies
  • feedback from stars
Invited Talks

          Guinevere Kauffmann
          What can be Learned from the Atomic and Molecular Gas Scaling Relations of Nearby Galaxies?
          Casey Papovich
          On the Star Formation Rates and Star Formation Histories of Massive Galaxies
          Emanuele Daddi
          Star Formation Modes in Distant Massive Galaxies

Contributed Talks
          Chris Hayward
          The Contribution of Merger-Induced Starbursts to the Sub-Millimeter Galaxy Population
          Carrie Bridge
          WISE-selected Lyman-alpha Blobs at z~2
          Discussion led by Rachel Somerville


  1. I think the question to answer here is whether we really know high-z star formation rates. To a factor of 2? To a factor of 5? What about the well known discrepancy between "direct" estimates of stellar mass-density as a function of z and integration of published versions of the Lilly-Madau plot? Is this error in the SFR indicators? In the mass density estimates? In the assumed IMF?

  2. Maybe a cautionary tale is useful here. Remember cooling flows? The gas state is much simpler than in star-forming galaxies. The energy loss mechanism is well understood and the associated radiation is directly observed. Nevertheless, the mass flow rates onto cluster centres were typically overestimated by an order of magnitude. Why? Because the early observations, while correct, were not good enough, and more importantly, because the astrophysics of even this simple situation (compared to the star-forming ISM in massive galaxies) turned out to be more complex than we thought.


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