set multiplot
set xrange [0.15:0.40]
set yrange [0:2.5]
set xlabel 'T/|W|'
set ylabel 'Critical Radii'
set size square
plot 'toomre' using 1:3 with lines ti 'Q_-=1',\
'toomre' using 1:4 with lines ti 'Q_+=1',\
'toomre' using 1:10 with lines ti 'R_+',0.0*x+1.0 ti 'R_{max}',\
'toomre' using 1:11 with lines ti 'R_-',\
'toomre' using 1:12 with lines ti 'R_{/Symbol l}'
unset key
plot 'toomre' using 1:2 with points,\
'toomre' using 1:5 with points,\
'toomre' using 1:6 with points,\
'toomre' using 1:7 with points
unset multiplot