Halo velocity bias

Matteo Biagetti, Vincent Desjacques, Alex Kehagias, Antonio Riotto

Research output: Contribution to journalArticlepeer-review

Abstract

It has been recently shown that any halo velocity bias present in the initial conditions does not decay to unity, in agreement with predictions from peak theory. However, this is at odds with the standard formalism based on the coupled-fluids approximation for the coevolution of dark matter and halos. Starting from conservation laws in phase space, we discuss why the fluid momentum conservation equation for the biased tracers needs to be modified in accordance with the change advocated in Baldauf et al. Our findings indicate that a correct description of the halo properties should properly take into account peak constraints when starting from the Vlasov-Boltzmann equation.

Original languageEnglish
Article number103529
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Volume90
Issue number10
DOIs
StatePublished - 25 Nov 2014
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Physics and Astronomy (miscellaneous)

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