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Interstellar Dust and Extinction
Annual Review of Astronomy and Astrophysics, 1987The ultraviolet (UV) region of the spectrum has been crucial in providing information on the nature of the material and size distribution of the particles of interstellar dust. Before there were any measurements of the UV properties of interstellar extinction, interstellar particles were believed to be composed primarily of dirty ices.
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Interstellar extinction and polarization by spheroidal dust grains
Astrophysics and Space Science, 1984Using the recently available exact computations of the scattering efficiencies of spheroidal particles numerical calculations of the extinction and polarization curves have been made for a distribution of particle sizes, shapes and orientations. The results are presented and compared with the observed interstellar extinction and polarization.
D. B. Vaidya, H. C. Bhatt, J. N. Desai
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Interstellar extinction by spheroidal absorbing dust grains
Astrophysics and Space Science, 1987On the basis of exact computations of the extinction efficiencies of spheroidal absorbing particles, numerical calculations of the extinction curves have been made for a distribution of particle sizes. The results are presented and compared with the observed interstellar extinction. For the sake of comparison, results for the nonabsorbing particles are
D. B. Vaidya, J. N. Desai
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Three-dimensional maps of the interstellar dust extinction curve within the Milky Way galaxy
ScienceInterstellar dust grains cause extinction (absorption and scattering) of light from background astronomical sources. The spectral shape of the extinction curve depends on the dust composition. We used low-resolution optical spectra to measure the extinction curve of 130 million stars. By inverting these data, we mapped the extinction curve
Gregory M Green, Xiangyu Zhang
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Astrophysics, 1988
In the framework of the model of core-mantle (core consisting of astronomical silicate, mantle consisting of dirty ice) cylindrical grains partly oriented by the Davis-Greenstein mechanism, curves of the interstellar circular polarization q(/lambda/) are calculated.
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In the framework of the model of core-mantle (core consisting of astronomical silicate, mantle consisting of dirty ice) cylindrical grains partly oriented by the Davis-Greenstein mechanism, curves of the interstellar circular polarization q(/lambda/) are calculated.
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Applied Optics, 2002
Optical extinction spectra for particles of structurally disordered carbonaceous material (carbon black, soot) are discussed in terms of the effects of size and shape and the difference between coagulated and coalesced particles. For this purpose, the orientation-averaged specific extinction for several compact and open aggregates of spherical ...
Michael, Quinten +3 more
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Optical extinction spectra for particles of structurally disordered carbonaceous material (carbon black, soot) are discussed in terms of the effects of size and shape and the difference between coagulated and coalesced particles. For this purpose, the orientation-averaged specific extinction for several compact and open aggregates of spherical ...
Michael, Quinten +3 more
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Astrophysics and Space Science, 1979
A smooth surface layer of highly disordered olivine, (Mg, Fe)2SiO4, has been produced by exposure of polished, natural olivine to a dose of 5×1016 cm−2 of 1.5 MeV neon ions from a Van de Graaff accelerator. The dielectric functions of the disordered silicate in the wavelength range from 8 to 30 μm have been determined from analysis of specular ...
W. Kr�tschmer, Donald R. Huffman
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A smooth surface layer of highly disordered olivine, (Mg, Fe)2SiO4, has been produced by exposure of polished, natural olivine to a dose of 5×1016 cm−2 of 1.5 MeV neon ions from a Van de Graaff accelerator. The dielectric functions of the disordered silicate in the wavelength range from 8 to 30 μm have been determined from analysis of specular ...
W. Kr�tschmer, Donald R. Huffman
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Dust Extinction from RF Regression of Interstellar Lines
2023González-Gaitán Santiago +1 more
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1996
The assumption of Galactic Interstellar Dust properties in modeling the effects of Extragalactic Interstellar Dust will lead to large errors. Properties of Galactic dust have been amenable to study through observations of scattering and absorption along individual sightlines toward point sources, and through high spatial resolution observations of ...
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The assumption of Galactic Interstellar Dust properties in modeling the effects of Extragalactic Interstellar Dust will lead to large errors. Properties of Galactic dust have been amenable to study through observations of scattering and absorption along individual sightlines toward point sources, and through high spatial resolution observations of ...
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