We present Spitzer 24µm imaging of 1.5 < z < 2.5 Distant Red Galaxies ( DRGs ) in the 10′ \times 10′ Extended Hubble Deep Field South of the Multiwavelength Survey by Yale-Chile .
We detect 65 % of the DRGs with K _ { \mathrm { AB } } < 23.2 mag at S _ { \mathrm { 24 { \mu } m } } \gtrsim 40 \mu Jy , and conclude that the bulk of the DRG population are dusty active galaxies .
A mid-infrared ( MIR ) color analysis with IRAC data suggests that the MIR fluxes are not dominated by buried AGN , and we interpret the high detection rate as evidence for a high average star formation rate of < \mathrm { SFR } > = 130 \pm 30 M _ { \odot } yr ^ { -1 } .
From this , we infer that DRGs are important contributors to the cosmic star formation rate density at z \sim 2 , at a level of \sim 0.02 M _ { \odot } yr ^ { -1 } Mpc ^ { -3 } to our completeness limit of K _ { \mathrm { AB } } = 22.9 mag .