In this talk I will show how the powerful combination of gravitational
lensing and sensitive, high-resolution imaging can provide direct
observational tests of galaxy formation scenarios and, perhaps, the
nature of dark matter under the cold dark matter paradigm. In
particular, I will discuss placing observational constraints on the
subhalo mass function by, for the first time, directly measuring
masses of satellites / subhalos in cosmologically-distant galaxies.
These measurements can be made even if the satellites are composed
purely of dark matter, and provide an excellent complement to
information obtained from investigations of Milky Way satellite
galaxies. The imaging used for this project comes from Keck adaptive
optics (AO) and Hubble Space Telescope (HST) observations. In some
cases the AO imaging is clearly sharper than that obtained with HST.
lensing and sensitive, high-resolution imaging can provide direct
observational tests of galaxy formation scenarios and, perhaps, the
nature of dark matter under the cold dark matter paradigm. In
particular, I will discuss placing observational constraints on the
subhalo mass function by, for the first time, directly measuring
masses of satellites / subhalos in cosmologically-distant galaxies.
These measurements can be made even if the satellites are composed
purely of dark matter, and provide an excellent complement to
information obtained from investigations of Milky Way satellite
galaxies. The imaging used for this project comes from Keck adaptive
optics (AO) and Hubble Space Telescope (HST) observations. In some
cases the AO imaging is clearly sharper than that obtained with HST.
| Building: | West Hall |
|---|---|
| Website: | |
| Event Type: | Lecture / Discussion |
| Tags: | Astronomy, Physics |
| Source: | Happening @ Michigan from Department of Astronomy |
