There has been much recent debate about whether the stars in the cores of giant elliptical galaxies was formed according to the same IMF as observed in the Milky Way. Evidence from the detailed analysis of galaxy spectra suggests ellipticals harbour an enhanced population of low-mass stars, which would inflate their stellar mass-to-light substantially, and some dynamical/lensing studies support this. In this talk I will present results from some very nearby strong-lensing ellipticals in which it is possible to derive very robust stellar masses from lensing alone. The measured mass-to-light ratios in these systems are (surprisingly?) consistent with expectations from a Milky-Way-like IMF. I will discuss some possible explanations for the discrepancies among recent studies in this area, and describe new observations which may help to resolve them.
Unless announced otherwise, the lunch talks start at 12:30 sharp. The approximate duration of the lunch talk is given above, and additional time will be given for questions and discussion following the presentation. Please make sure that you take ample time to pick up your lunch beforehand.
Information for Speakers and Hosts: Talks by internal speakers are limited to 20 minutes, with additional time for questions. Visiting speakers can have up to 30 minutes, with additional time for questions. Hosts are responsible for bringing the speaker to the correct room in ample time to set up laptops etc., and for ensuring the speaker also has time for lunch.
For questions and/or suggestions concerning the lunch talks, please contact Themiya Nanayakkara () or Alvaro Hacar ()).