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Modeling of interstellar extinction with composite dust grains
Astronomical and Astrophysical Transactions, 2002A model of interstellar dust must satisfy two conditions: dust grains have to be of the reasonable structure and chemical composition and explain basic observations. The latter are the interstellar extinction law and the depletion of interstellar elements. In this work, a new model of composite dust grains is considered.
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Three-component dust models for interstellar extinction
Journal of Astrophysics and Astronomy, 2010Interstellar extinction curves obtained from the ‘extinction without standard’ method were used to constrain the dust characteristics in the mean ISM (R V = 3.1), along the lines of sight through a high latitude diffuse molecular cloud towards HD 210121 (R
C Muthumariappan
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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
Xiangyu Zhang, Gregory M Green
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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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Interstellar Dust Models: Extinction, Absorption and Emission
EAS Publications Series, 2009The observational constraints on interstellar dust are summarized. A dust model, consisting of a mixture of amorphous silicate, graphite, and PAH material that reproduces the observed interstellar extinction, is described. It is used to calculate the infrared emission expected when such dust is heated by radiation with the spectrum of interstellar ...
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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
openaire +2 more sources