THE FORMATION OF COSMIC FULLERENES FROM AROPHATIC CLUSTERS

被引：71

作者：

Micelotta, Elisabetta R. ^{[1
]}

Jones, Anthony P. ^{[2
]}

Cami, Jan ^{[1
,3
]}

Peeters, Els ^{[1
,3
]}

Bernard-Salas, Jeronimo ^{[2
]}

Fanchini, Giovanni ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Phys & Astron, London, ON N6A 3K7, Canada

[2] Univ Paris 11, Inst Astrophys Spatiale, CNRS, F-91405 Orsay, France

[3] SETI Inst, Mountain View, CA 94043 USA

来源：

ASTROPHYSICAL JOURNAL | 2012年 / 761卷 / 01期

基金：

加拿大自然科学与工程研究理事会;

关键词：

circumstellar matter; infrared: general; ISM: molecules; planetary nebulae: general; stars: AGB and post-AGB; HYDROGENATED AMORPHOUS-CARBON; POLYCYCLIC AROMATIC-HYDROCARBONS; CORONAE-BOREALIS STARS; PROTOPLANETARY NEBULAE; PLANETARY-NEBULAE; C-60; EVOLUTION; SOLIDS; DUST; DECOMPOSITION;

D O I：

10.1088/0004-637X/761/1/35

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Fullerenes have recently been identified in space and they may play a significant role in the gas and dust budget of various astrophysical objects including planetary nebulae (PNe), reflection nebulae, and H II regions. The tenuous nature of the gas in these environments precludes the formation of fullerene materials following known vaporization or combustion synthesis routes even on astronomical timescales. We have studied the processing of hydrogenated amorphous carbon (a-C:H or HAC) nanoparticles and their specific derivative structures, which we name "arophatics," in the circumstellar environments of young, carbon-rich PNe. We find that UV-irradiation of such particles can result in the formation of fullerenes, consistent with the known physical conditions in PNe and with available timescales.

引用

页数：8

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