The prominent dust emission feature near 8.9 mu m in four HII regions

E Peeters; A. G. G. M. Tielens; ACA Boogert; TL Hayward; LJ Allamandola

doi:10.1086/427143

The prominent dust emission feature near 8.9 mu m in four HII regions

E Peeters^*
, A. G. G. M. Tielens
, ACA Boogert
, TL Hayward
, LJ Allamandola

^*Corresponding author for this work

Research output: Contribution to journal › Review article › peer-review

11 Citations (Scopus)

Abstract

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 mum. 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 mum. Thus, the carrier of this band likely resides within the H II region. Possible carriers of this feature are highlighted.

Original language	English
Pages (from-to)	774-785
Number of pages	12
Journal	Astrophysical Journal
Volume	620
Issue number	2
DOIs	https://doi.org/10.1086/427143
Publication status	Published - 20-Feb-2005

Keywords

HII regions
infrared : ISM
ISM : lines and bands
ISM : molecules
H-II REGIONS
POLYCYCLIC AROMATIC-HYDROCARBONS
FAR-INFRARED OBSERVATIONS
RADIO RECOMBINATION LINE
HIGH-ANGULAR RESOLUTION
METHANOL MASER SURVEY
STAR-FORMING REGIONS
MOLECULAR CLOUD
INTERSTELLAR DUST
MASSIVE STARS

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@article{4b15342facda4ff0a7adbae35099316d,

title = "The prominent dust emission feature near 8.9 mu m in four HII regions",

abstract = "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 mum. 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 mum. Thus, the carrier of this band likely resides within the H II region. Possible carriers of this feature are highlighted.",

keywords = "HII regions, infrared : ISM, ISM : lines and bands, ISM : molecules, H-II REGIONS, POLYCYCLIC AROMATIC-HYDROCARBONS, FAR-INFRARED OBSERVATIONS, RADIO RECOMBINATION LINE, HIGH-ANGULAR RESOLUTION, METHANOL MASER SURVEY, STAR-FORMING REGIONS, MOLECULAR CLOUD, INTERSTELLAR DUST, MASSIVE STARS",

author = "E Peeters and Tielens, \{A. G. G. M.\} and ACA Boogert and TL Hayward and LJ Allamandola",

year = "2005",

month = feb,

day = "20",

doi = "10.1086/427143",

language = "English",

volume = "620",

pages = "774--785",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IoP Publishing",

number = "2",

}

TY - JOUR

T1 - The prominent dust emission feature near 8.9 mu m in four HII regions

AU - Peeters, E

AU - Tielens, A. G. G. M.

AU - Boogert, ACA

AU - Hayward, TL

AU - Allamandola, LJ

PY - 2005/2/20

Y1 - 2005/2/20

N2 - 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 mum. 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 mum. Thus, the carrier of this band likely resides within the H II region. Possible carriers of this feature are highlighted.

AB - 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 mum. 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 mum. Thus, the carrier of this band likely resides within the H II region. Possible carriers of this feature are highlighted.

KW - HII regions

KW - infrared : ISM

KW - ISM : lines and bands

KW - ISM : molecules

KW - H-II REGIONS

KW - POLYCYCLIC AROMATIC-HYDROCARBONS

KW - FAR-INFRARED OBSERVATIONS

KW - RADIO RECOMBINATION LINE

KW - HIGH-ANGULAR RESOLUTION

KW - METHANOL MASER SURVEY

KW - STAR-FORMING REGIONS

KW - MOLECULAR CLOUD

KW - INTERSTELLAR DUST

KW - MASSIVE STARS

U2 - 10.1086/427143

DO - 10.1086/427143

M3 - Review article

SN - 0004-637X

VL - 620

SP - 774

EP - 785

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

The prominent dust emission feature near 8.9 mu m in four HII regions

Abstract

Keywords

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