The population of planetary nebulae and H II regions in M 81 - A study of radial metallicity gradients and chemical evolution

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Table 7:

Properties of M 81 and the Galaxy.
	M 81	MW
Morphological type	Sa	Sbc
Total mass [ $M_{\odot}$ ]	$2.3\times10^{11}$ (a)	$1.8{-}3.7\times10^{11}$ (b)
Gas mass [ $M_{\odot}$ ]	$2.9\times10^9$ (c)	$4\times10^9$ (d)
Luminosity [ $L_{\odot}$ ]	$1.9\times10^{10}$ (a)	$\dots$
Total SFR [ $M_{\odot}$ yr^-1]	0.4-0.8 (e)	0.35 (f)
Max $V_{\rm rot}$ [km s^-1]	260 (g)	200 (h)

Notes. (a) Appleton et al. (1981); (b) Hodge & Miller (1992); (c) Karachentsev & Kashibadze (2006); (d) van der Kruit (1990); (e) Gordon et al. (2004); (f) Walterbos & Braun (1994); (g) Rohlfs & Krertschmann (1980); (h) MD05.

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