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.
Categories: astro-ph.CO