POLYCYCLIC AROMATIC HYDROCARBONS AND THE EXTINCTION CURVE

被引：7

作者：

Mulas, G. ^{[1
]}

Malloci, G. ^{[1
]}

Joblin, C. ^{[2
,3
]}

Cecchi-Pestellini, C. ^{[1
]}

机构：

[1] Ist Nazl Astrofis, Osservatorio Astronom Cagliari, Str 54,Localita Poggio Pini, I-09012 Capoterra, CA, Italy

[2] Univ Toulouse, UPS, CESR, F-31028 Toulouse 4, France

[3] CNRS, UMR 5187, F-31028 Toulouse, France

来源：

PAHS AND THE UNIVERSE: A SYMPOSIUM TO CELEBRATE THE 25TH ANNIVERSARY OF THE PAH HYPOTHESIS | 2011年 / 46卷

关键词：

DIFFUSE INTERSTELLAR BANDS; ELECTRONIC-ABSORPTION-SPECTRA; ULTRAVIOLET EXTINCTION; GAS-PHASE; LABORATORY SPECTRA; OPTICAL-PROPERTIES; INFRARED-EMISSION; SILICATE GRAINS; PAH MOLECULES; CHARGE-STATE;

D O I：

10.1051/eas/1146034

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Aromatic carbon, in some form, has been an essential ingredient by and large in all models of the extinction curve, since the original proposal to attribute the bump at 217.5 nm to "astronomical graphite". This aromatic carbon is most naturally identified, in up to date models, with a population of Polycyclic Aromatic Hydrocarbons (PAHs), free and/or clustered. In all models, this PAH population accounts for the far-UV nonlinear rise in the extinction curve, contributes to the bump and possibly part of the large set of unidentified, discrete absorption features in the visible (the Diffuse Interstellar Bands). We review the current state of our understanding of the contribution of PAHs to interstellar extinction, and what constraints can be imposed on the PAH population by fitting extinction models to observations.

引用

页码：327 / +

页数：4

共 78 条

[1] POLYCYCLIC AROMATIC-HYDROCARBONS AND THE UNIDENTIFIED INFRARED-EMISSION BANDS - AUTO EXHAUST ALONG THE MILKY-WAY [J].