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Table 2

Parameters of log SFR(M yr-1) = alog M(M) + b fits of the global MSSF for galaxies of different morphologies.

Morph. Sa Sb Sbc Sc Sd

logarithmic slope (a) 0.34 0.65 0.71 0.77 0.94
zero-point (b) −3.87 −6.83 −7.05 −7.66 −9.12
log SFR(M = 1010 M) −0.47 −0.33 −0.05 −0.04 0.28

Notes. They are obtained for panel (a) in Fig. 4. For convenience, the corresponding SFR for a 1010 M galaxy is also listed (in M yr-1). The slope is significantly shallower in Sa than in later spirals because most of the Sa galaxies are off the MSSF.

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