High resolution IR observations of the starburst ring in NGC 7552 - One ring to rule them all?

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Table 6

Data of selected luminous clusters from the literature for comparison.

	Galactic	Starburst	NGC 3603^c	NGC 5253^d	NGC 1365^e		NGC 4038/39^f		Arp 143^g		M 82^h
	H ii regions^a	galaxies^b		C2	M 5	M 6	peak 1	peak 5	knot E	knot F	region 2	region 3


L_IR [10⁹ L_⊙]		50	0.01	1.0		0.8	11.4	3.9
M [10⁶ M_⊙]				≈ 1	38	25	3		25	6
A_V [mag]		4.3	≤ 1	17	3.2	8.5	4.5	10.5	1.2	1.3	≈15	≈25
Age [Myr]			~1	<6	7	7	2.5	4.5	3.5	2.5	5.5	5.5
[Ne iii] / [Ne ii]	0.8	0.29ⁱ	3.13	8.4			0.63	0.69	0.52	0.67	0.13	0.19

Notes.

^(a)

Giveon et al. (2002);

^(b)

Thornley et al. (2000); Brandl et al. (2006);

^(c)

Lebouteiller et al. (2008);

^(d)

Martín-Hernández et al. (2005);

^(e)

Galliano et al. (2008);

^(f)

Brandl et al. (2009);

^(g)

Beirão et al. (2009);

^(h)

Beirão et al. (2008);

⁽ⁱ⁾

mean of 20 starburst galaxies, excluding the dwarfs II Zw 40 and NGC 5253.

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