Abstract
We investigate unbound dark matter particles in halos by tracing particle trajectories in a simulation run to the far future (a = 100). We find that the traditional sum of kinetic and potential energies is a very poor predictor of which dark matter particles will eventually become unbound from halos. We also study the mass fraction of unbound particles, which increases strongly towards the edges of halos, and decreases significantly at higher redshifts. We discuss implications for dark matter detection experiments, precision calibrations of the halo mass function, the use of baryon fractions to constrain dark energy, and searches for intergalactic supernovae.
Original language | English (US) |
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Article number | 019 |
Journal | Journal of Cosmology and Astroparticle Physics |
Volume | 2013 |
Issue number | 6 |
DOIs | |
State | Published - Jun 2013 |
Externally published | Yes |
Keywords
- Cosmological parameters from LSS
- Cosmological simulations
- Galaxy clusters
- Supernovas
ASJC Scopus subject areas
- Astronomy and Astrophysics