VUV spectroscopy of carbon dust analogs: contribution to interstellar extinction

Context. A full spectral characterization of carbonaceous dust analogs is necessary to understand their potential as carriers of observed astronomical spectral signatures such as the ubiquitous UV bump at 217.5 nm and the far-ultraviolet (FUV) rise common to interstellar extinction curves. Aims. Our...

Full description

Saved in:
Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 2016-02, Vol.586, p.A106
Main Authors: Gavilan, L., Alata, I., Le, K. C., Pino, T., Giuliani, A., Dartois, E.
Format: Article
Language:English
Subjects:
Analogs
Astrophysics
Carbon
Dust
extinction
galaxies: ISM
infrared: ISM
Interstellar extinction
Interstellar matter
Links
methods: laboratory: solid state
Sciences of the Universe
Soot
Spectra
ultraviolet: ISM
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Context. A full spectral characterization of carbonaceous dust analogs is necessary to understand their potential as carriers of observed astronomical spectral signatures such as the ubiquitous UV bump at 217.5 nm and the far-ultraviolet (FUV) rise common to interstellar extinction curves. Aims. Our goal is to study the spectral properties of carbonaceous dust analogs from the FUV to the mid-infrared (MIR) domain. We seek in particular to understand the spectra of these materials in the FUV range, for which laboratory studies are scarce. Methods. We produced analogs to carbonaceous interstellar dust encountered in various phases of the interstellar medium: amorphous hydrogenated carbons (a-C:H), for carbonaceous dust observed in the diffuse interstellar medium, and soot particles, for the polyaromatic component. Analogs to a-C:H dust were produced using a radio-frequency plasma reactor at low pressures, and soot nanoparticles films were produced in an ethylene (C2H4) flame. We measured transmission spectra of these thin films (thickness
ISSN:0004-6361
1432-0746
1432-0756
DOI:10.1051/0004-6361/201527098