Constraints on Dark Matter annihilation and Its Equation of State after Planck Data

Abstract

In this paper, the annihilation of dark matter $f_d{\epsilon }_0$ with nonzero equation of state $w_{dm}$ was studied by using the currently available cosmic observations which include the geometric and dynamic measurements. The constrained results show they are anti-correlated and are $w_{dm}=0.000390_{-0.000753}^{+0.000754}$ and $f_d{\epsilon }_0=1.172_{-1.172}^{+0.243}$ respectively in $1\sigma$ regions. With the including of possible annihilation of dark matter, no significant deviation from $\Lambda$CDM model was found in the $1\sigma$ region.

9 pages, 2 figures, invited review for the special issue of MPLA. Reference updated

References in corpus (10)

• CMB Constraints on WIMP Annihilation: Energy Absorption During the Recombination Epoch
• The velocity function in the local environment from LCDM and LWDM constrained simulations
• Updated CMB constraints on Dark Matter annihilation cross-sections
• Impact of dark matter decays and annihilations on reionization
• Constraints on Dark Matter annihilations from reionization and heating of the intergalactic gas
• The impacts of dark matter particle annihilation on recombination and the anisotropies of the cosmic microwave background
• The emptiness of voids: yet another over-abundance problem for the LCDM model
• How Dark Matter Reionized The Universe
• Impact of Dark Matter Annihilation on the High-Redshift Intergalactic Medium
• Equation of State of Dark Matter after Planck Data

Cited by in corpus (2)

• Constraining dark matter properties with Cosmic Microwave Background observations
• Introduction to the special issue of Modern Physics Letters A "Indirect dark matter searches"