THE EXCITATION OF 12 MICRON EMISSION FROM VERY SMALL PARTICLES

被引：55

作者：

SELLGREN, K

LUAN, L

WERNER, MW

机构：

[1] UNIV CALIF BERKELEY, DEPT ASTRON, BERKELEY, CA 94720 USA

[2] UNIV HAWAII, INST ASTRON, HONOLULU, HI 96822 USA

[3] NASA, AMES RES CTR, DIV SPACE SCI, MOFFETT FIELD, CA 94035 USA

来源：

ASTROPHYSICAL JOURNAL | 1990年 / 359卷 / 02期

关键词：

Infrared: spectra; Interstellar: grains; Nebulae: reflection; Radiation mechanisms;

D O I：

10.1086/169072

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the results of IRAS observations of visual reflection nebulae illuminated by stars with effective temperatures between 3000 and 33,000 K. The ratio of the energy radiated in the IRAS 12 μm band to the total energy radiated at far-infrared wavelengths (60 and 100 μm) is ∼0.2, with little or no dependence on the temperature of the illuminating star for stellar temperatures between ∼5000 and 33,000 K. We interpret this as requiring that visual photons as well as ultraviolet photons are capable of exciting 12 μm emission from very small particles.

引用

页码：384 / 391

页数：8

共 39 条

[1] INTERSTELLAR POLYCYCLIC AROMATIC-HYDROCARBONS - THE INFRARED-EMISSION BANDS, THE EXCITATION EMISSION MECHANISM, AND THE ASTROPHYSICAL IMPLICATIONS [J].