Fig. 21
Left (from top to bottom) for NGC 4501, NGC 4567/68, and NGC 4321: SFEH2-Rmol/Ptot, Q-Rmol/Ptot, and SFEH2-Q. Middle: relations corrected for the unknown velocity dispersion (see text). Right: with the SFEH2 of NGC 4501 corrected for the external pressure (leading to a 0.1 dex lower SFEH2). The dotted lines correspond to the correlations predicted by the analytical model: log (SFEH2) / log (Rmol/Ptot = −1, log (Rmol/Ptot) / log (Q) = 1.4, and log (SFEH2) / log (Q) = −1.5. The dashed lines correspond to correlations fitted to the data: log (SFEH2) / log (Rmol/Ptot = −0.5, log (Rmol/Ptot) / log (Q) = 1.5, and log (SFEH2) / log (Q) = −0.9.
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