Interstellar SiC grains
نویسندگان
چکیده
منابع مشابه
Interstellar Grains
Overview Submicron solid particles are dispersed through interstellar gas. These interstellar grains absorb and scatter light, thus shielding some regions from ultraviolet radiation, but also limiting our ability to detect photons which have been emitted by astronomical objects. Dust grains reradiate absorbed energy in the in-frared, thus contributing to the overall emission spectrum of astrono...
متن کاملInterstellar Dust Grains
This review surveys the observed properties of interstellar dust grains: the wavelength-dependent extinction of starlight, including absorption features, from UV to infrared; optical luminescence; infrared emission; microwave emission; optical, UV, and X-ray scattering by dust; and polarization of starlight and of infrared emission. The relationship between presolar grains in meteorites and the...
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The year of 2005 marks the 75th anniversary since Trumpler (1930) provided the first definitive proof of interstellar grains by demonstrating the existence of general absorption and reddening of starlight in the galactic plane. This article reviews our progressive understanding of the nature of interstellar dust.
متن کاملComposite Interstellar Grains
A composite dust grain model which is consistent with the observed interstellar extinction and linear polarization is presented. The composite grain is made up of a host silicate spheroid and graphite inclusions. The extinction efficiencies of the composite spheroidal grains for three axial ratios are computed using the discrete dipole approximation (DDA). The interstellar extinction curve is e...
متن کاملMore Interstellar Exposure Ages of Large Presolar Sic Grains from the Murchison Meteorite
MURCHISON METEORITE. F. Gyngard 1 , J. N. Ávila 2,3 , T. R. Ireland 2,3 , and E. Zinner 1 , 1 Laboratory for Space Sciences and Department of Physics, [email protected], Washington University, St. Louis, MO 63130, USA, 2 Research School of Earth Sciences, The Australian National University, Canberra ACT 0200, Australia, 3 Planetary Science Institute, The Australian National University, Canberr...
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ژورنال
عنوان ژورنال: SCIENTIA SINICA Physica, Mechanica & Astronomica
سال: 2016
ISSN: 1674-7275
DOI: 10.1360/sspma2016-00141