Results 191 to 200 of about 430,768 (202)

Interstellar extinction by spheroidal absorbing dust grains

Astrophysics and Space Science, 1987
On 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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Interstellar Dust and Extinction

Annual Review of Astronomy and Astrophysics, 1987
The 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, 1984
Using 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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Extinction and polarization of light by dust in the interstellar medium: The interstellar circular polarization

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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Wavelength-dependent optical extinction of carbonaceous particles in atmospheric aerosols and interstellar dust

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, Uwe, Kreibig, Thomas, Henning, Harald, Mutschke   +3 more
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Infrared extinction of heavy ion irradiated and amorphous olivine, with applications to interstellar dust

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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Dust Extinction from RF Regression of Interstellar Lines

2023
González-Gaitán Santiago, Gutiérrez Claudia P.   +1 more
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Interstellar Dust and Extinction

Annual Review of Astronomy and Astrophysics, 1990
John S Mathis
exaly  

Properties of interstellar dust responsible for extinction laws with unusually low total-to-selective extinction ratios of R=1−2

Planetary and Space Science, 2016
Takaya Nozawa
exaly  

Interstellar Dust Grain Alignment

Annual Review of Astronomy and Astrophysics, 2015
B-G Andersson, John Vaillancourt, Alex Lazarian   +2 more
exaly