Table 1
Comparison of the starburst properties of NGC 1068 with NGC 4945, NGC 253, M 82, the LMC and the Milky Way.
| Source | d | Γa | Lγa | RSNb | Mgasc | LIR | L5 GHz | Lγ/L5GHz |
| (Mpc) | (1039 erg s-1) | (yr-1) | (109 M⊙) | (1044 erg s-1) | (1038 erg s-1) | |||
|
|
||||||||
| NGC 1068 | 14.4 | 2.31 ± 0.13 | 170 ± 32 | 0.20 ± 0.08 | 4.4 | 2.7 | 16.6 | 102 |
| NGC 4945 | 3.6 | 2.30 ± 0.10 | 19.5 ± 2.9 | 0.1–0.5 | 4.2 | 1.4 | 2.2 | 89 |
| NGC 253 | 3.9 | 1.95 ± 0.4 | 7.2 ± 4.7 | 0.2 ± 0.1 | 2.5 ± 0.6 | 1.0 | 2.0 | 36 |
| M 82 | 3.6 | 2.2 ± 0.2 | 13.0 ± 5.0 | 0.2 ± 0.1 | 2.5 ± 0.7 | 1.2 | 3.0 | 43 |
| LMC | 0.049 | – | 0.041 ± 0.007 | 0.005 ± 0.002 | 0.67 ± 0.08 | 0.016 | 0.017 | 24 |
| Milky Way | – | – | 3.2 ± 1.6 | 0.02 ± 0.01 | 6.5 ± 2.0 | 0.5 | 0.36 | 89 |
Notes.
Photon indices and luminosities in the γ-ray band from Abdo et al. (2010c) for M 82, NGC 253, the LMC and the Milky Way. The γ-ray luminosities are given in the 100 MeV−5 GeV band, and the photon indices Γ are given above 200 MeV for an easier comparison with the results from Abdo et al. (2010c).
SN rate estimates from Wilson & Ulvestad (1982); Blietz et al. (1994); Mannucci et al. (2003) for NGC 1068, from Lenc & Tingay (2009) for NGC 4945, and from Abdo et al. (2010c, and references therein) for M 82, NGC 253, the LMC and the Milky Way.
Gas mass estimates from Sage et al. (1990) for NGC 1068, from Weiß et al. (2008) for NGC 4945, and from Abdo et al. (2010c, and references therein) for M 82, NGC 253, the LMC and the Milky Way.
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