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• W4296149842 endingPage "A82" @default.
• W4296149842 startingPage "A82" @default.
• W4296149842 abstract "We present a model for the diffuse interstellar dust that explains the observed wavelength-dependence of extinction, emission, and the linear and circular polarisation of light. The model is set up with a small number of parameters. It consists of a mixture of amorphous carbon and silicate grains with sizes from the molecular domain of 0.5 up to about 500 nm. Dust grains with radii larger than 6 nm are spheroids. Spheroidal dust particles have a factor 1.5–3 greater absorption cross section in the far-infrared than spherical grains of the same volume do. Mass estimates derived from submillimetre observations that ignore this effect are overestimated by the same amount. In the presence of a magnetic field, spheroids may be partly aligned and polarise light. We find that polarisation spectra help to determine the upper particle radius of the otherwise rather unconstrained dust size distribution. Stochastically heated small grains of graphite, silicates, and polycyclic aromatic hydrocarbons (PAHs) are included. We tabulate parameters for PAH emission bands in various environments. They show a trend with the hardness of the radiation field that can be explained by the ionisation state or hydrogenation coverage of the molecules. For each dust component its relative weight is specified so that absolute element abundances are not direct input parameters. The model is compared to the average properties of the Milky Way, which seem to represent dust in the solar neighbourhood. It is then applied to specific sight lines towards four particular stars, with one of them located in the reflection nebula NGC 2023. For these sight lines, we present ultra-high signal-to-noise linear and circular spectro-polarimetric observations obtained with FORS at the VLT. Using prolate rather than oblate grains gives a better fit to observed spectra; the axial ratio of the spheroids is typically two and aligned silicates are the dominant contributors to the polarisation." @default.
• W4296149842 created "2022-09-17" @default.
• W4296149842 creator A5015871489 @default.
• W4296149842 creator A5031474913 @default.
• W4296149842 creator A5045988242 @default.
• W4296149842 date "2014-01-01" @default.
• W4296149842 modified "2023-10-17" @default.
• W4296149842 title "Dust in the diffuse interstellar medium" @default.
• W4296149842 cites W154545499 @default.
• W4296149842 cites W1569925696 @default.
• W4296149842 cites W1598755323 @default.
• W4296149842 cites W1644066953 @default.
• W4296149842 cites W1647593176 @default.
• W4296149842 cites W1659875532 @default.
• W4296149842 cites W1963963863 @default.
• W4296149842 cites W1964757248 @default.
• W4296149842 cites W1965372241 @default.
• W4296149842 cites W1968389390 @default.
• W4296149842 cites W1971260598 @default.
• W4296149842 cites W1971338832 @default.
• W4296149842 cites W1976367625 @default.
• W4296149842 cites W1976868761 @default.
• W4296149842 cites W1977457396 @default.
• W4296149842 cites W1977561189 @default.
• W4296149842 cites W1981664053 @default.
• W4296149842 cites W1981833741 @default.
• W4296149842 cites W1984438844 @default.
• W4296149842 cites W1990667339 @default.
• W4296149842 cites W1993718469 @default.
• W4296149842 cites W1995057328 @default.
• W4296149842 cites W1999349670 @default.
• W4296149842 cites W2000750617 @default.
• W4296149842 cites W2002641216 @default.
• W4296149842 cites W2004436253 @default.
• W4296149842 cites W2006869439 @default.
• W4296149842 cites W2007491149 @default.
• W4296149842 cites W2007993160 @default.
• W4296149842 cites W2011018103 @default.
• W4296149842 cites W2012681976 @default.
• W4296149842 cites W2014099646 @default.
• W4296149842 cites W2014308698 @default.
• W4296149842 cites W2015322641 @default.
• W4296149842 cites W2016499138 @default.
• W4296149842 cites W2018294124 @default.
• W4296149842 cites W2018858432 @default.
• W4296149842 cites W2021276338 @default.
• W4296149842 cites W2025423418 @default.
• W4296149842 cites W2028593254 @default.
• W4296149842 cites W2029990702 @default.
• W4296149842 cites W2034608771 @default.
• W4296149842 cites W2034989960 @default.
• W4296149842 cites W2035198704 @default.
• W4296149842 cites W2035345792 @default.
• W4296149842 cites W2040241222 @default.
• W4296149842 cites W2040259698 @default.
• W4296149842 cites W2044561508 @default.
• W4296149842 cites W2044584226 @default.
• W4296149842 cites W2048274049 @default.
• W4296149842 cites W2050372498 @default.
• W4296149842 cites W2050514016 @default.
• W4296149842 cites W2050965589 @default.
• W4296149842 cites W2052037688 @default.
• W4296149842 cites W2052039892 @default.
• W4296149842 cites W2053976222 @default.
• W4296149842 cites W2055716401 @default.
• W4296149842 cites W2056400752 @default.
• W4296149842 cites W2058633551 @default.
• W4296149842 cites W2058874798 @default.
• W4296149842 cites W2059215206 @default.
• W4296149842 cites W2060110495 @default.
• W4296149842 cites W2064414791 @default.
• W4296149842 cites W2067676426 @default.
• W4296149842 cites W2075105883 @default.
• W4296149842 cites W2076682070 @default.
• W4296149842 cites W2079228085 @default.
• W4296149842 cites W2079344922 @default.
• W4296149842 cites W2083846574 @default.
• W4296149842 cites W2084926137 @default.
• W4296149842 cites W2089321614 @default.
• W4296149842 cites W2093405363 @default.
• W4296149842 cites W2100183643 @default.
• W4296149842 cites W2107204596 @default.
• W4296149842 cites W2107490503 @default.
• W4296149842 cites W2109916079 @default.
• W4296149842 cites W2112821712 @default.
• W4296149842 cites W2132802601 @default.
• W4296149842 cites W2138911062 @default.
• W4296149842 cites W2142722860 @default.
• W4296149842 cites W2143213816 @default.
• W4296149842 cites W2144339350 @default.
• W4296149842 cites W2146827996 @default.
• W4296149842 cites W2147688290 @default.
• W4296149842 cites W2148165343 @default.
• W4296149842 cites W2148504537 @default.
• W4296149842 cites W2151703051 @default.
• W4296149842 cites W2153512113 @default.
• W4296149842 cites W2157382609 @default.
• W4296149842 cites W2171949060 @default.

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