Table 1
Main properties of the galaxies in our study.
| Galaxy | RA | Dec | Type | Da | V LSR b | θ s c | N(H2)d | L IR e | SFRf | M HI e | M gas g |
| (J2000) | (J2000) | (Mpc) | (km s-1) | (′′) | ( × 1022 cm-2) | ( × 109 L ⊙ ) | (M ⊙ yr-1) | ( × 109 M ⊙ ) | ( × 108 M ⊙ ) | ||
|
|
|||||||||||
| M 82 | 09:55:51.9 | +69:40:47.1 | I0 | 3.6 | 300 | 12.0 | 7.9 | 29.74 | ∼ 9 | 1.30 | 5.2 |
| NGC 253 | 00:47:33.4 | –25:17:23.0 | SAB(s)c | 3.9 | 250 | 20.0 | 6.2 | 15.10 | 3.6 | 2.57 | 28.0 |
| IC 342 | 03:46:48.5 | +68:05:46.0 | SAB(rs)cd | 3.3 | 31 | 10.6 | 5.8 | 2.26 | 2.5 | 18.2 | 1.4 |
| Maffei 2 | 02:41:55.1 | +59:36:15.0 | SAB(rs)bc | 3.3 | –17 | 11.0 | 4.4 | 2.7 | 0.5 | ... | 8.0 |
Notes.
Values from Freedman et al. (1994) for M 82, Karachentsev et al. (2003) for NGC 253 and IC 342 and Fingerhut et al. (2007) for Maffei 2;
velocities with respect to the Local Standard of Rest. In M 82 the value refers to the northeastern lobe;
sizes of the emitting region, taken from: Martín et al. (2006a) for M 82; This work for NGC 253; Bayet et al. (2006) for IC 342; Mauersberger et al. (1989) for Maffei 2;
values taken from Mauersberger et al. (2003), and further corrected by the source size in Col. 7;
values taken from de Vaucouleurs et al. (1991);
values taken from Strickland et al. (2004) for NGC 253 and M 82; Walker et al. (1992) for IC342;
estimate of the global molecular gas mass contained in the source. We have assumed that the gas is in a virial equilibrium. For the estimates we used the source sizes θs of Col. 7 and an average linewidths calculated from those presented in Table A.1.
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