Fitting functions for dark matter density profiles

J. An*, Hongsheng Zhao

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a unified parametrization of the fitting functions suitable for the density profiles of dark matter haloes or elliptical galaxies. A notable feature is that the classical Einasto profile appears naturally as the continuous limiting case of the cored subfamily amongst the double power-law profiles of Zhao. Based on this, we also argue that there is basically no qualitative difference between halo models fitted well by the Einasto profile and the standard Navarro-Frenk-White model. This might even be the case quantitatively, unless the resolution of simulations and the precision of fittings are sufficiently high to make meaningful distinctions possible.

Original languageEnglish
Pages (from-to)2805-2811
Number of pages7
JournalMonthly Notices of the Royal Astronomical Society
Volume428
Issue number4
DOIs
Publication statusPublished - 1 Jan 2013

Keywords

  • Dark matter
  • Methods: analytical

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