GRAPPA @ 5: Celebrating 5 years of astroparticle physics and cosmology in Amsterdam

Session

Contributed talks - Dark Matter

16 Oct 2017, 11:30

Amsterdam

13. The Dark Matter distribution of the Milky Way: its uncertainties and their effects on the determination of new physics

Fabio Iocco (ICTP-SAIFR)

16/10/2017, 11:30

I will illustrate the current status of the determination of the Dark Matter content and distribution within our own Galaxy -the Milky Way- achieved by making use of improved methods and enhanced databases.
After this, I will show how the current uncertainties arising from such state-of-the-art astrophysical methods and observations affect the determination of Dark Matter properties, offering...

1. The Birth of the Dark Matter Problem

Mr J. de Swart (University of Amsterdam)

16/10/2017, 11:45

This contribution is a historical reflection on the rise of the dark matter hypothesis. Specifically, it focusses on understanding how the problem of dark matter came to matter in the early 1970s, decades after it had been famously introduced by Fritz Zwicky (1933). What were the conditions that brought about new conclusions on the existence of dark matter in this period? I will argue that the...

25. Gaia and the Local Dark Matter Density

Dr Hamish Silverwood (Institut de Ciències del Cosmos, Universitat de Barcelona)

16/10/2017, 12:00

The local dark matter density is required to interpret results from direct detection experiments, whether they are searching for WIMPs, sterile neutrinos, or axions. Here I give an update to our ongoing project to determine the local DM density using stellar motions and our advanced Jeans equation based analysis. This includes our recent measurement using SDSS-SEGUE G-dwarfs, and a look ahead...

26. The Galactic Center Excess with Skyfact

Richard Bartels (University of Amsterdam)

16/10/2017, 12:15

An anomalous excess at energies of a few GeV is seen in the Fermi-LAT data.
Being well fit by an NFW profile and centered on the Galactic Center, this so-called Galactic Center Excess (GCE) has generated a lot of excitement over the past years due to its consistency with a dark matter origin. However, there exist viable astrophysical explanations, most notably unresolved millisecond pulsars....

28. How to distinguish warm intergalactic medium from warm dark matter?

Antonella Garzilli

16/10/2017, 12:30

We reconsider the problem of determining the warmness of dark matter
from the growth of large scale structures. In particular, we have
re-analyzed the previous work of Viel et al 2013, based on high
resolution Lyman-alpha forest spectra. In fact, the flux power
spectrum exhibits a cut-off below ~ 1.5 Mpc/h, this may be explained
by the temperature of the intergalactic medium (IGM) or be due...