期刊
ASTRONOMY & ASTROPHYSICS
卷 428, 期 1, 页码 99-U35出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20034137
关键词
ISM : dust, extinction; ISM : general
The optical properties of small spherical iron grains are derived using a Kramers-Kronig-consistent model of the dielectric function including its dependence on temperature and size. Especially discussed is the effect of the size dependence, which results from the limitation of the free path of the free electrons in the metal by the size of the grain, on the absorption behaviour of small iron spheres and spheroids. The estimated absorption properties are applied to study the temperature behaviour of spherical and spheroidal grains which are heated by the interstellar radiation field.
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