TeV Particle Astrophysics 2011

Session

Distribution of dark matter

Dist

4 Aug 2011, 10:20

AlbaNova University Center

460. Dark Matter distribution on large and small scales

Dr Andrea Maccio (Max Planck Institute for Astronomy)

04/08/2011, 10:20

Distribution of dark matter

Oral

I will summarize current results based on cosmological simulations about the distribution of Dark Matter on both large and small scales. I will show how the distribution of DM can be influence by the nature of the dark matter candidate (Warm vs Cold), by the modeling of Dark Energy and by the presence of baryons.

447. Dark Matter spikes constraints on WIMPS from 1 GeV-10 TeV from Fermi

douglas spolyar (FNAL)

04/08/2011, 10:55

Distribution of dark matter

Oral

10 to 10^5 solar mass black holes with dark matter spikes that formed in early minihalos and still exist in our Milky Way Galaxy today are examined in light of recent data from the Fermi Gamma-Ray Space Telescope (FGST). The dark matter spikes surrounding black holes in our Galaxy are sites of significant dark matter annihilation. We examine the signatures of annihilations into...

442. Dark matter annihilation signatures in stellar oscillations and nuclear clusters

Jordi Casanellas (CENTRA-IST, Lisbon)

04/08/2011, 11:20

Distribution of dark matter

Oral

Strong deviations from the classical picture of stellar evolution are predicted when low-mass stars are embedded in halos of dark matter (DM) particles with very high densities, such as those expected in the inner parsec of our galaxy. In this talk we will focus on two possible strategies to detect the influence of the DM captured inside low-mass stars. First, by looking at the...

446. Dark Matter Distribution in Dwarf Galaxies and Globular Clusters

Mr Pascal Steger (Institute for Astronomy, ETH Zurich)

04/08/2011, 11:45

Distribution of dark matter

Oral

The dark matter distribution in dwarf galaxies and potentially in globular clusters is of great interest for indirect dark matter searches. In order to understand the distribution of dark matter in the smallest observable structures, we investigate the evolution of the radial density profile of dwarf spheroidal galaxies and globular clusters. We present first results from a very...

466. Gravitational Lenses of the Dark Universe

Dr Adam Amara (ETH Zurich)

04/08/2011, 13:30

Distribution of dark matter

Oral

Gravitational lensing, which occurs when the light from distant objects is bent as it passes by matter, is a uniquely powerful tool in astronomy. It allows us to make direct measurements of the unseen components of the Universe, including dark matter and dark energy, which dominate the Universe around us but are not understood. Explaining these two dark components remains one of the...

445. Dark Matter distribution in the central region of the Galaxy

Fabio Iocco (Institute d'Astrophysique de Paris)

04/08/2011, 14:05

Distribution of dark matter

Oral

Dark Matter distribution in the central region of the Galaxy

443. Limits on the local dark matter density

Ms Silvia Garbari (ITP - University of Zürich)

04/08/2011, 14:30

Distribution of dark matter

Oral

We revisit the systematic problems that arise in determining the local matter and dark matter density from the vertical motion of stars at the Solar Neighbourhood. We use a simulation of a Milky Way-like galaxy to analyse these systematics and determine the quality of data required to detect dark matter at its expected local density. We introduce new unbiased method for recovering ρ_DM,...

462. Prospects for Indirect Detection of Dark Matter in Dwarf Galaxies

Dr Matthew Walker (Harvard-Smithsonian Center for Astrophysics)

04/08/2011, 15:30

Distribution of dark matter

Oral

Of all galaxy types, the Milky Way's dwarf spheroidal (dSph) satellites have the largest inferred dark matter densities and smallest measured baryonic masses. These facts combine to make dSphs attractive targets for indirect detection of dark matter via self-annihilation and/or decay events. A detection (or non-detection) of high-energy photons that might be released in such processes...

444. Measuring the DM halo profile of dwarf spheroidal galaxies

Dr Jorge Penarrubia (IoA, University of Cambridge)

04/08/2011, 16:05

Distribution of dark matter

Oral

Dwarf spheroidal galaxies (dSphs) are the most dark matter(DM) dominated and densest galaxies in the known Universe. As such they provide interesting cases for indirect DM detection experiments. Unfortunately, deriving the distribution of DM in dSphs is severely hampered by the strong degeneracy that exists between the stellar velocity anisotropy and enclosed DM mass. Here I will present...