2005ApJ...620..774P

Query : 2005ApJ...620..774P

2005ApJ...620..774P - Astrophys. J., 620, 774-785 (2005/February-3)

The prominent dust emission feature near 8.9 µm in four H II regions.

PEETERS E., TIELENS A.G.G.M., BOOGERT A.C.A., HAYWARD T.L. and ALLAMANDOLA L.J.

Abstract (from CDS):

We present a mid-infrared study of four H II regions based on the combination of Infrared Space Observatory (ISO) SWS observations with spatial information from SpectroCam-10 images and long-slit spectra. We report a prominent broad emission feature near 8.9 µm. The peak position and width of this feature do not resemble known polycyclic aromatic hydrocarbon (PAH) or dust emission features. Its spatial distribution is analyzed for two H II regions and is clearly distinct from that of the PAH emission features, being more similar to that of the ionized gas and especially to the spatial distribution of the dust continuum at 15 µm. Thus, the carrier of this band likely resides within the H II region. Possible carriers of this feature are highlighted.

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Journal keyword(s): ISM: H II Regions - Infrared: ISM - ISM: Lines and Bands - ISM: Molecules

Simbad objects: 12

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Number of rows : 12
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 IRAS 15567-5236 HII 16 00 32.9 -52 44 45           ~ 35 0
2 IRAS 16279-4757 pA* 16 31 38.7381067320 -48 04 05.637444456           M3II 43 0
3 NAME M 17 SW SFR 18 20 23.1 -16 11 43           ~ 281 0
4 NGC 6618 OpC 18 20 47 -16 10.3           ~ 1700 0
5 CORNISH G029.9559-00.0168 Y*O 18 46 04.18 -02 39 21.3           ~ 385 0
6 NAME K 3-50A HII 20 01 45.6 +33 32 42           ~ 85 0
7 W 58a HII 20 01 45.8 +33 32 43           ~ 294 4
8 NGC 6857 HII 20 01 47.71 +33 31 33.4           ~ 88 3
9 [W69] C Rad 20 01 54.2 +33 34 15           ~ 18 0
10 IRAS 21190+5140 HII 21 20 44.84 +51 53 27.5           ~ 133 2
11 [FCM84] M17 N-Bar ? ~ ~           ~ 6 0
12 [FCM84] M17 S-Bar ? ~ ~           ~ 6 0

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