As regards the total gravitino relic abundance Ω e G h 2 , we apply the 3 σ range derived from WMAP 5 year data [ 66 ] 0.091 < Ω e G h 2 < 0.128 , ( 3.1 ) which in the figures below will be marked as green bands and labeled " Ω e G h 2 " . As previously in [ 16 ] , we also include the bound on the possible distortion in the nearly perfect black - body shape of the CMB spectrum [ 67 ] by the injection of energetic photons into the plasma . However we note that this constraint ( delineated with magenta line with a label " CMB " over it ) seems generally less important than that due to the BBN [ 68,69 ] .