Measuring subhalo mass in redMaPPer clusters with CFHT Stripe 82 Survey

We use the shear catalogue from the CFHT Stripe-82 Survey to measure the subhalo masses of satellite galaxies in redMaPPer clusters. Assuming a Chabrier initial mass function and a truncated NFW model for the subhalo mass distribution, we find that the subhalo mass to galaxy stellar mass ratio increases as a function of projected halo-centric radius rp, from M\ ₒₔ₁/M\ ₒₓ₀ₑ=4. 43^+ 6. 63- ₂. ₂₃ at rp ∈ 0. 1, 0. 3 h−1 Mpc to M\ ₒₔ₁/M\ ₒₓ₀ₑ=75. 40^+ 19. 73- ₁₉. ₀₉ at rp ∈ 0. 6, 0. 9 h−1 Mpc. We also investigate the dependence of subhalo masses on stellar mass by splitting satellite galaxies into two stellar mass bins: 10 Mstar/h−1 M) Mstar/h−1 M) \ (M\ ₒₔ₁/h^{-1\\, \ }) =11. 14 ^+ 0. 66 - ₀. ₇₃ (M\ ₒₔ₁/M\ ₒₓ₀ₑ=19. 5^+19. 8-₁₇. ₉) versus \ (M\ ₒₔ₁/h^{-1\\, \ }) =12. 38 ^+ 0. 16 - ₀. ₁₆ (M\ ₒₔ₁/M\ ₒₓ₀ₑ=21. 1^+7. 4-₇. ₇).