Constraints on the dark matter neutralinos from the radio emissions of galaxy clusters

Ching Yee Kiew, Chorng Yuan Hwang, Zamri Zainal Abibin

Research output: Contribution to journalArticlepeer-review

Abstract

By assuming the dark matter to be composed of neutralinos, we used the detection of upper limit on diffuse radio emission in a sample of galaxy clusters to put constraint on the properties of neutralinos. We showed the upper limit constraint on sv-m? space with neutralino annihilation through bb¯ and μ +μ -channels. The best constraint is from the galaxy clusters A2199 and A1367. We showed the uncertainty due to the density profile and cluster magnetic field. The largest uncertainty comes from the uncertainty in dark matter spatial distribution. We also investigated the constraints on minimal Supergravity (mSUGRA) and minimal supersymmetric standard model (MSSM) parameter space by scanning the parameters using the DARKSUSY package. By using the current radio observation, we managed to exclude 40 combinations of mSUGRA parameters. On the other hand, 573 combinations of MSSM parameters can be excluded by current observation.

Original languageEnglish
Pages (from-to)2924-2933
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume467
Issue number3
DOIs
StatePublished - 1 Jun 2017

Keywords

  • Dark matter
  • Elementary particles
  • Galaxies: clusters: general
  • Radiation mechanisms: non-thermal

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