Radial velocity, V_r (upper panel), and velocity dispersion, σ (lower panel), for M87, as a function of galactocentric distance, R (in units of arcsec). We have corrected V_r for the system heliocentric velocity of 1284 km s⁻¹ (as in Cappellari et al. 2011). Negative and positive values of R correspond to opposite sides of the LUCI slit. The dashed black line in the upper panel marks the value of zero. Error bars correspond to 1-sigma uncertainties. In the lower panel, the red curve shows how we model the σ radial trend.