Porous elongated dust grains exhibit decreasing intrinsic polarization with rising porosity and 90-degree polarization flips at specific wavelength-to-size ratios, enabling a new multi-wavelength method to constrain grain porosity in protoplanetary disks.
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Numerical simulations of porous fractal and consolidated particles show stronger forward scattering, broader polarization peaks, and lower absorption per unit mass than compact spheres, implying larger dust masses from observed fluxes.
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Intrinsic polarisation of elongated porous dust grains
Porous elongated dust grains exhibit decreasing intrinsic polarization with rising porosity and 90-degree polarization flips at specific wavelength-to-size ratios, enabling a new multi-wavelength method to constrain grain porosity in protoplanetary disks.
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Modeling (Sub-)millimeter Scattering Properties of Fractal and Consolidated Porous Particles: Applications to Protoplanetary Disks
Numerical simulations of porous fractal and consolidated particles show stronger forward scattering, broader polarization peaks, and lower absorption per unit mass than compact spheres, implying larger dust masses from observed fluxes.