1996A&A...315L.289R

Query : 1996A&A...315L.289R

1996A&A...315L.289R - Astronomy and Astrophysics, volume 315L289-292 (1996/11-2)

SWS observations of IR emission features towards compact HII regions.

ROELFSEMA P.R., COX P., TIELENS A.G.G.M., ALLAMANDOLA L.J., BALUTEAU J.-P., BARLOW M.J., BEINTEMA D., BOXHOORN D.R., CASSINELLI J.P., CAUX E., CHURCHWELL E., CLEGG P.E., DE GRAAUW T., HERAS A.M., HUYGEN R., VAN DER HUCHT K.A., HUDGINS D.M., KESSLER M.F., LIM T. and SANDFORD S.A.

Abstract (from CDS):

We present ISO Short Wavelength Spectrometer (SWS) grating spectra of six compact HII regions. In addition to strong emission lines from atomic species these spectra display infrared bands attributed to Polycyclic Aromatic Hydrocarbons (PAHs). The continuous spectral coverage of the present observations and the high spectral resolution allow to describe the detailed structure of the emission bands: the 7.7µm band is composed of two bands at 7.6 and 7.8µm, the 6.2 µm band has a long wavelength extension, there is a plateau of emission between 6 and 7µm and a new feature is reported at 11.0µm in addition to the well-known 11.2µm band. These observations also reveal large variations in the relative intensities of the dust bands, in particular between the 7.7 and 8.6µm bands. In one extreme case, the 8.6µm band is stronger than the 7.7µm band. These observations are compared to a mixed population of ionized PAHs, using new laboratory measurements.

Abstract Copyright: ∼

Journal keyword(s): ISM: dust - ISM: HII regions - ISM: molecules - infrared: ISM: lines and bands

Simbad objects: 8

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Number of rows : 8
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 NGC 1333 OpC 03 29 09.2 +31 20 59           ~ 1575 1
2 GAL 013.875+00.28 HII 18 14 35.2 -16 45 21           ~ 99 0
3 NAME HH 80-81 IRS HII 18 19 11.8 -20 47 35           ~ 157 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 SH 2-87 bub 19 46 20.69 +24 35 15.4           ~ 161 2
7 IRAS 21190+5140 HII 21 20 44.84 +51 53 27.5           ~ 133 2
8 SH 2-138 HII 22 32 45.7 +58 28 20           ~ 115 2

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