EFFECTS OF COSMIC RAYS ON HYDROCARBON INTERSTELLAR DUST

被引：1

作者：

Godard, M. ^{[1
,2
]}

Feraud, G. ^{[3
]}

Chabot, M. ^{[5
]}

Carpentier, Y. ^{[4
]}

Pino, T.

Brunetto, R. ^{[1
]}

Duprat, J. ^{[6
]}

Engrand, C.

Brechignac, P.

d'Hendecourt, L. ^{[1
]}

Dartois, E. ^{[1
]}

机构：

[1] Univ Paris 11, Inst Astrophys Spatiale, Bat 121, F-91405 Orsay, France

[2] NASA, Goddard Space Flight Ctr, Astrochem Lab, Code 691, Greenbelt, MD 20771 USA

[3] Univ Paris 11, Inst Sci Mol Orsay, F-91405 Orsay, France

[4] Univ Paris 11, Inst Phys Nucl Orsay, F-91405 Orsay, France

[5] Univ Lille 1, Lab Phys Lasers Atomes & Mol, F-59655 Villeneuve Dascq, France

[6] Univ Paris 11, Ctr Spectrometrie Nucl & Spectrometrie Masse, F-91405 Orsay, France

来源：

ECLA: EUROPEAN CONFERENCE ON LABORATORY ASTROPHYSICS | 2013年 / 58卷

关键词：

ABSORPTION-BAND; ION IRRADIATION; CARBON GRAINS; C-H; EVOLUTION; CARRIER;

D O I：

10.1051/eas/1258067

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Hydrogenated amorphous carbons, an important component of the interstellar carbonaceous dust, possess infrared spectral signatures (at 3.4, 6.9 and 7.3 mu m) that are ubiquitous in the diffuse interstellar medium of galaxies, but not observed in dense clouds. To better understand the role played by cosmic rays in the disappearance of these absorption bands, irradiation experiments of hydrocarbon dust analogues have been performed with different swift ions. The results obtained through the in situ infrared monitoring of the samples during the irradiations allow to infer the dehydrogenation effect of the cosmic ray distribution on the interstellar hydrogenated amorphous carbons. The importance of this interstellar dust destruction by cosmic rays is discussed in comparison to other energetic processes in different interstellar environments.

引用

页码：395 / +

页数：2

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