Observational Constraints of 30–40 GeV Dark Matter Annihilation in Galaxy Clusters

Table 1

The scale radius (in Mpc), the scale density (in  Mpc), -factor (in ), the gamma-ray flux from cosmic ray emission [13–15], the observed gamma-ray flux upper limits (95% CL) [13], and the calculated upper limits (95% CL) of the annihilation cross section ( and ) for A2877 and Fornax. All the units for the gamma-ray flux and annihilation cross section are in cm s and cm s, respectively.

	A2877	Fornax
	0.411	0.196
	8.67	12.9
	17.3	18.1
( MeV)	0.51	0.84
( GeV)	0.29	0.49
( MeV)	0.9	3.1
( GeV)	0.43	1.4
( MeV)	0.39	2.3
( GeV)	0.94	0.14
( MeV)	37	19
( GeV)	28	14
( MeV)	16	14
( GeV)	9.2	9.0