A multiwavelength study of the W33 Main ultracompact HII region

Open Access

Table 5

Physical properties of regions.

Region	Radius (pc)	T_e (K)	τ_C (5.8 GHz)	EM (10⁶ pc cm⁻⁶)	n_e (10³ cm⁻³)	N_Ly (10⁴⁸s⁻¹)	Ionized mass (M_⊙)	Spectral type
1	0.12	6522 ± 158	0.18 ± 0.005	12.4 ± 0.1	9.4 ± 1.0	5.4 ± 1.1	0.91 ± 0.1	O6.5
2	0.08	6528 ± 239	0.07 ± 0.003	5.02 ± 0.06	6.2 ± 0.6	1.7 ± 0.3	0.43 ± 0.04	O8
3	0.08	6487 ± 151	0.19 ± 0.005	13.0 ± 0.1	10.0 ± 1.0	4.3 ± 1.0	0.69 ± 0.07	O7
4	0.25	4856 ± 356	0.01	0.33 ± 0.01	0.38 ± 0.04	1.7 ± 0.3	6.9 ± 0.7	O8

Notes. The columns show the radius, average electron temperature, peak continuum optical depth at 5.8 GHz, emission measure, electron density, Lyman continuum photon rate, ionized mass, and the spectral type of the central star for each of the four HII regions in the W33 Main region.

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