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Table 1

Properties and gamma-ray characteristics of Local Group and nearby starburst galaxies (see text).

Galaxy d M HI M H2 SFR F γ L γ
kpc 108M 108M M yr-1 10-8 ph cm-2 s-1 1041 ph s-1 10-25 ph s-1 H-atom-1

MW ... 35 ± 4(7) 14 ± 2(7) 1−3(19) ... 11.8 ± 3.4(28) 2.0 ± 0.6
M 31 780 ± 33(1) 73 ± 22(8) 3.6 ± 1.8(14) 0.35−1(19) 0.9 ± 0.2 6.6 ± 1.4 0.7 ± 0.3
M 33 847 ± 60(2) 19 ± 8(9) 3.3 ± 0.4(9) 0.26−0.7(20)  < 0.5  < 5.0  < 2.9
LMC 50 ± 2(3) 4.8 ± 0.2(10) 0.5 ± 0.1(15) 0.20−0.25(21) 26.3 ± 2.0(25) 0.78 ± 0.08 1.2 ± 0.1
SMC 61 ± 3(4) 4.2 ± 0.4(11) 0.25 ± 0.15(16) 0.04−0.08(22) 3.7 ± 0.7(26) 0.16 ± 0.04 0.31 ± 0.07
M 82 3630 ± 340(5) 8.8 ± 2.9(12) 5 ± 4(17) 13−33(23) 1.6 ± 0.5(27) 252 ± 91 158 ± 75
NGC 253 3940 ± 370(6) 64 ± 14(13) 40 ± 8(18) 3.5−10.4(24) 0.6 ± 0.4(27) 112 ± 78 9 ± 6

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