Cosmic-ray driven dynamo in the interstellar medium of irregular galaxies

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Table 1:

Main properties of NGC 4449, NGC 6822, and IC 10.
	NGC 4449	NGC 6822	IC 10
Type	IBm	IB(s)m	dIrr
Distance [Mpc]	4.21	0.50	0.66
Diameter [kpc]	5.73	1.71	1.27
SFR	high	low	high
$\langle B_{\rm tot} \rangle$ [ $\mu$ G]	5-15	$\leq$ 5	5-15
$\langle B_{\rm reg} \rangle$ [ $\mu$ G]	$\simeq$ 8	$\leq$ 3	$\leq$ 3

Notes. In the following rows we present: the morphological type of the object (LEDA), the distance (Karachentsev et al. 2004), the size calculated from D₂₅ (LEDA) and distance, the star formation rate (SFR), and the results of the radio analysis of Chyzy et al. (2000, 2003).

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