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Manuscript Title: CLUMPY: a code for γ-ray signals from dark matter structures
Authors: Aldée Charbonnier, Céline Combet, David Maurin
Program title: CLUMPY
Catalogue identifier: AEKS_v1_0
Distribution format: tar.gz
Journal reference: Comput. Phys. Commun. 183(2012)656
Programming language: C/C++.
Computer: PC and Mac.
Operating system: UNIX(Linux), MacOS X.
RAM: Depends on the requested size of skymaps (~40 Mb for a 500 × 500 map)
Keywords: Dark matter, Indirect detection, Gamma-rays.
PACS: 95.35.+d, 95.85.Pw, 98.35.Gi.
Classification: 1.1, 1.9.

External routines: CERN ROOT library (http://root.cern.ch/drupal/), Doxygen (http://www.doxygen.org) (optional)

Nature of problem:
Calculation of γ-ray signal from dark matter annihilation (resp. decay). This involves a particle physics term and an astrophysical one. The focus here is on the latter.

Solution method:
Integration of the DM density squared (resp. density) along a line of sight. The code is optimised to deal with the DM density peaks encountered along the line of sight (DM substructures). A semi-analytical approach (calibrated on N-body simulations) is used for the spatial and mass distributions of the dark matter substructures in the Galaxy.

Some generic dark matter annihilation spectra are provided but are not included in the calculation so far as it is assumed that the particle physics is independent of the astrophysics of the problem.

Running time:
This is highly dependent on the DM profiles considered, the requested precision ε and integration angle αint:
  • about 60 mn for a 5° × 5° map towards the Galactic centre, with αint = 0.01°, NFW dark matter profiles and ε = 10-2;
  • about 2h for the same set-up towards the anti-centre;
  • 0.1 to 10 DM models per second, depending on integration angle and DM profile.