Day 105

Thursday.  Girl's night out tonight.  Told family about Aaron.  Still no apartment, I hope I get the one I see next week...


1110.2484
Improved constraints on the primordial power spectrum at small scales from ultracompact minihalos
Bringmann, Scott, Akrami


Ultracompact mini-halos: expected to have greater abundance than primordial BHs; formed shortly after matter-radiation equality; could appear as highly luminous gamma-ray sources, or leave an imprint in the CMB by changing the reionisation history.  Derive limits on cosmic abundance of UCMHs at different epochs, translate into constraints on primordial power spectrum; constraints are quite severe.  Use results to provide updated compilation of best available constraints on the power density fluctuations on all scales, from present-day horizon to 20 orders of mag smaller scales.


* don't UCMHs get erased due to photon-baryon fluid coupling to DM (to some extent)?  To the 0th order, it's not supposed to...


AIfA Bonn PhD Colloquium
Dynamical evolution of massive star clusters
Andreas Kuepper


Study dissolution of massive star clusters by direct N-body calculations.  Star clusters dissolving in the tidal field of their host galaxy; directly applicable to observed globular clusters.  Focus on formation process of tidal tails and substructure within tidal streams which will be compared with theoretical expectations.  Influence of tidal debris on the appearance of star clusters is shown, consequences for observations of star clusters pointed out.  Example: Palomar 13 star cluster.  Outlook how such investigations can be used to study DM content of MW.