Jul 26 – 30, 2010
Montpellier 2 University
Europe/Paris timezone

Signatures of Dark Star Remnants in the Galactic Halo

Jul 29, 2010, 2:00 PM
20m
Amphithéatre Dumontet (Montpellier 2 University)

Amphithéatre Dumontet

Montpellier 2 University

Place Eugene Bataillon, 34095 Montpellier Cedex 5 FRANCE

Speaker

Pearl Sandick (Thoery Group and Texas Cosmology Center, the University of Texas at Austin)

Description

The very first stars likely formed from metal-free, molecular hydrogen-cooled gas at the center of dark matter minihalos. Prior to nuclear fusion, these stars may have been supported by dark matter heating from annihilations in the star. As the dark matter fuel supply became depleted, nuclear fusion and standard stellar evolution would have begun, and today the objects that began their lives as so-called Dark Stars would exist as a population of remnant intermediate mass black holes surrounded by dark matter spikes. Here we explore the signatures of dark matter annihilations in the dark matter spikes surrounding these black holes for a range of dark star formation scenarios, black hole masses, and dark matter annihilation modes.

Primary author

Pearl Sandick (Thoery Group and Texas Cosmology Center, the University of Texas at Austin)

Co-authors

Douglas Spolyar (Center for Particle Astrophysics, Fermi National Accelerator Laboratory) Juerg Diemand (Institute for Theoretical Physics, University of Zurich) Katherine Freese (Michigan Center for Theoretical Physics, University of Michigan)

Presentation materials