2006MNRAS.372..457S

Query : 2006MNRAS.372..457S

2006MNRAS.372..457S - Mon. Not. R. Astron. Soc., 372, 457-466 (2006/October-2)

Evolution of HII regions in hierarchically structured molecular clouds.

SHABALA S.S., ELLINGSEN S.P., KURTZ S.E. and FORBES L.K.

Abstract (from CDS):

We present observations of the H91α recombination line emission towards a sample of nine Hii regions associated with 6.7-GHz methanol masers, and report arcsecond-scale emission around compact cores. We derive physical parameters for our sources, and find that although simple hydrostatic models of region evolution reproduce the observed region sizes, they significantly underestimate emission measures. We argue that these findings are consistent with young source ages in our sample, and can be explained by existence of density gradients in the ionized gas.

Abstract Copyright: 2006 The Authors. Journal compilation © 2006 RAS

Journal keyword(s): stars: formation - Hii regions - ISM: structure - radio lines: ISM

Simbad objects: 15

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Number of rows : 15
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 RAFGL 4176 Y*O 13 43 01.70352 -62 08 51.2304           ~ 163 0
2 [GGB2012] G308.9176+00.1231 HII 13 43 02.1 -62 08 52           ~ 59 0
3 IRAS 13471-6120 cor 13 50 41.810 -61 35 10.67           ~ 65 0
4 GAL 309.92+00.48 HII 13 50 42.0 -61 35 09           ~ 34 0
5 RAFGL 4972S cor 15 00 34.52760 -58 58 08.9076           ~ 51 1
6 OH 318.95-00.20 Y*O 15 00 55.35024 -58 58 53.2848           ~ 85 1
7 IRAS 15520-5234 HII 15 55 48.336 -52 43 10.20           ~ 59 1
8 PMN J1634-4805 HII 16 34 15.8 -48 05 20           ~ 7 0
9 GAL 336.40-00.23 HII 16 34 19 -48 05.3           ~ 7 0
10 OH 339.88-01.26 Y*O 16 52 04.6776 -46 08 34.404           ~ 119 1
11 IRAS 16533-4009 HII 16 56 45.58 -40 14 32.4           ~ 49 0
12 NGC 6334E HII 17 20 50.9 -35 46 06           ~ 52 0
13 NGC 6334 HII 17 20 53 -36 07.9           ~ 740 0
14 NAME NGC 6334F (C) HII 17 20 53.45 -35 47 02.6           ~ 244 1
15 ICRF J193925.0-634245 Sy2 19 39 25.0245304992 -63 42 45.640373400   18.87 18.37 17.64   ~ 1332 2

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