The stellar velocity dispersion profile of NGC 4636. The diamond is the central dispersion measured by Proctor & Sansom (2002). Large dots show the values from Bender et al. (1994), squares are the values derived from our FORS 2 spectra (see text for details). Unfilled (filled) squares indicate slits North (South) of the galaxy centre. The vertical dashed lines indicate the region we use to model the galaxy’s velocity dispersion profile (cf. Sect. 11.1.3). The solid green curve is a linear fit to the data for . The major axis measurements by Pu & Han (2011) are shown as small (orange) dots. For radii ≤ 0.219′, where the long slit extends to either side of the galaxy, we plot the averaged values; the uncertainties were added in quadrature. For comparison, the data points for blue and red GCs for constant number bins (final samples, values from Table 7) are shown as triangles. The vertical dotted line at marks the radius inside which blue and red GCs cannot be separated.
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