|COOKIES: By using this website you agree that we can place Google Analytics Cookies on your device for performance monitoring.|
Lensed Dusty Star-Forming Galaxies and Dark Matter Substructure
If you have a question about this talk, please contact Sergey Koposov.
Recently, wide-area mm/submm-wave surveys have discovered a large, new population of strongly lensed dusty, star-forming sources at high redshift (z~2-6). I will present ALMA resolved imaging of a sample of lensed sources discovered by the South Pole Telescope, in addition to the current state of lens models, which are allowing us to learn important properties about the sources. I will show that generalizing this lens modeling technique to fit the velocity components of molecular lines separately, effectively creating a 3D lens model of spatially resolved spectroscopic data, will drastically increase the sensitivity to the lensing signal of dark matter substructure in the lens halos. Using this method, I predict that there is >55% probability of detecting a substructure in a lens with a one-hour observation with ALMA if the mass fraction of substructure is f=1%. Given >100 lensing systems, this sample will be a promising place to look for dark matter substructure, and to measure the subhalo mass function with a high statistical significance.
This talk is part of the Institute of Astronomy Galaxies Discussion Group series.
This talk is included in these lists:
Note that ex-directory lists are not shown.
Other listsCAS FPGA Talks CrisisCamp Cambridge 'Expanding Horizons' - Cambridge MedSoc Talks
Other talksLocal government and sanitary reform in England and Wales, 1817-1914 Are we any closer to understanding and treating tinnitus? Lock-free programming Staging Poland: vaudeville, melodrama, and the appropriation of Eastern Europe in nineteenth-century French theatre The voices in our heads The phase transition in the random d-process