On the origin of infrared plateau features in proto-planetary nebulae

S  Kwok; K  Volk; P  Bernath

On the origin of infrared plateau features in proto-planetary nebulae

S Kwok, K Volk, P Bernath

Chemistry

Research output: Contribution to journal › Article › peer-review

Abstract

The emission profiles of the 8 and 12 mum plateau features are derived from the Infrared Space Observatory, spectra of proto-planetary nebulae. We suggest that these plateau features are primarily the result of alkane and alkene side groups on very large aromatic molecules and small carbonaceous particles. The relationship between the narrow aromatic hydrocarbon features and the 8 and 12 pm plateau features is discussed in a model of circumstellar chemical evolution where photochemical processing transforms the more aliphatic material in proto-planetary nebulae into more aromatic matter in planetary nebulae.

Original language	English
Pages (from-to)	L87-L90
Number of pages	4
Journal	The Astrophysical Journal
Volume	554
Issue number	1
Publication status	Published - 10 Jun 2001

Keywords

circumstellar matter
infrared : stars
ISM : lines and bands
planetary nebulae : general
stars : AGB and post-AGB
POLYCYCLIC AROMATIC-HYDROCARBONS
SPACE-OBSERVATORY SPECTROSCOPY
PROTOPLANETARY NEBULAE
CHEMICAL EVOLUTION
EMISSION FEATURES
IRAS SOURCES
CARBON
SPECTRA
BANDS
IDENTIFICATION

Cite this

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title = "On the origin of infrared plateau features in proto-planetary nebulae",

abstract = "The emission profiles of the 8 and 12 mum plateau features are derived from the Infrared Space Observatory, spectra of proto-planetary nebulae. We suggest that these plateau features are primarily the result of alkane and alkene side groups on very large aromatic molecules and small carbonaceous particles. The relationship between the narrow aromatic hydrocarbon features and the 8 and 12 pm plateau features is discussed in a model of circumstellar chemical evolution where photochemical processing transforms the more aliphatic material in proto-planetary nebulae into more aromatic matter in planetary nebulae.",

keywords = "circumstellar matter, infrared : stars, ISM : lines and bands, planetary nebulae : general, stars : AGB and post-AGB, POLYCYCLIC AROMATIC-HYDROCARBONS, SPACE-OBSERVATORY SPECTROSCOPY, PROTOPLANETARY NEBULAE, CHEMICAL EVOLUTION, EMISSION FEATURES, IRAS SOURCES, CARBON, SPECTRA, BANDS, IDENTIFICATION",

author = "S Kwok and K Volk and P Bernath",

year = "2001",

month = jun,

day = "10",

language = "English",

volume = "554",

pages = "L87--L90",

journal = "The Astrophysical Journal",

issn = "1538-4357",

publisher = "IOP Publishing",

number = "1",

}

TY - JOUR

T1 - On the origin of infrared plateau features in proto-planetary nebulae

AU - Kwok, S

AU - Volk, K

AU - Bernath, P

PY - 2001/6/10

Y1 - 2001/6/10

N2 - The emission profiles of the 8 and 12 mum plateau features are derived from the Infrared Space Observatory, spectra of proto-planetary nebulae. We suggest that these plateau features are primarily the result of alkane and alkene side groups on very large aromatic molecules and small carbonaceous particles. The relationship between the narrow aromatic hydrocarbon features and the 8 and 12 pm plateau features is discussed in a model of circumstellar chemical evolution where photochemical processing transforms the more aliphatic material in proto-planetary nebulae into more aromatic matter in planetary nebulae.

AB - The emission profiles of the 8 and 12 mum plateau features are derived from the Infrared Space Observatory, spectra of proto-planetary nebulae. We suggest that these plateau features are primarily the result of alkane and alkene side groups on very large aromatic molecules and small carbonaceous particles. The relationship between the narrow aromatic hydrocarbon features and the 8 and 12 pm plateau features is discussed in a model of circumstellar chemical evolution where photochemical processing transforms the more aliphatic material in proto-planetary nebulae into more aromatic matter in planetary nebulae.

KW - circumstellar matter

KW - infrared : stars

KW - ISM : lines and bands

KW - planetary nebulae : general

KW - stars : AGB and post-AGB

KW - POLYCYCLIC AROMATIC-HYDROCARBONS

KW - SPACE-OBSERVATORY SPECTROSCOPY

KW - PROTOPLANETARY NEBULAE

KW - CHEMICAL EVOLUTION

KW - EMISSION FEATURES

KW - IRAS SOURCES

KW - CARBON

KW - SPECTRA

KW - BANDS

KW - IDENTIFICATION

M3 - Article

SN - 1538-4357

VL - 554

SP - L87-L90

JO - The Astrophysical Journal

JF - The Astrophysical Journal

IS - 1

ER -