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Table 2:

Average gas properties and integrated galaxy colours for various literature galaxy samples.

Sample
Galaxy type #Galaxies Gas fraction Error gas fraction    
Huchtmeier (1989) E 46 0.36 0.16    
Huchtmeier (1989) Sa 154 0.49 0.17    
Huchtmeier (1989) Sb 635 0.53 0.16    
Huchtmeier (1989) Sc 1284 0.59 0.18    
Huchtmeier (1989) Sd 730 0.67 0.21    
Karachentsev et al. (1999) E 7 0.007 0.008    
Karachentsev et al. (1999) Sa 1 0.0003 -    
Karachentsev et al. (1999) Sb 6 0.015 0.015    
Karachentsev et al. (1999) Sc 21 0.078 0.092    
Karachentsev et al. (1999) Sd 45 0.19 0.14    
combined E 53 0.33 0.18    
combined Sa 155 0.48 0.17    
combined Sb 641 0.52 0.16    
combined Sc 1305 0.59 0.18    
combined Sd 775 0.67 0.26    
Sample Galaxy type #Galaxies [Fe/H](gas) Error [Fe/H](gas)    
Kewley et al. (2005) E 9 -0.09 0.18    
Kewley et al. (2005) Sa 6 -0.08 0.27    
Kewley et al. (2005) Sb 18 -0.09 0.27    
Kewley et al. (2005) Sc 34 -0.13 0.16    
Kewley et al. (2005) Sd 18 -0.42 0.32    
Nagao et al. (2006) E 3 -0.74 0.22    
Nagao et al. (2006) Sa 1 -1.05 -    
Nagao et al. (2006) Sb 3 -0.71 0.19    
Nagao et al. (2006) Sc 5 -1.07 0.34    
Nagao et al. (2006) Sd 47 -0.92 0.24    
Izotov et al. (2007) E 2 -0.85 0.1    
Izotov et al. (2007) Sa 1 -1.04 -    
Izotov et al. (2007) Sb 2 -0.66 0.24    
Izotov et al. (2007) Sc 8 -0.84 0.30    
Izotov et al. (2007) Sd 23 -0.95 0.31    
combined E 14 -0.34 0.39    
combined Sa 8 -0.32 0.50    
combined Sb 23 -0.22 0.36    
combined Sc 47 -0.35 0.42    
combined Sd 88 -0.83 0.34    
Sample Galaxy type #Galaxies U-B Error U-B B-V Error B-V
HyperLeda database E 547 0.36 0.21 0.83 0.13
HyperLeda database Sa 166 0.14 0.23 0.68 0.17
HyperLeda database Sb 329 0.02 0.19 0.61 0.16
HyperLeda database Sc 397 -0.10 0.15 0.50 0.13
HyperLeda database Sd 173 -0.23 0.20 0.39 0.17


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