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• W2950794889 abstract "We present POSSIS, a time-dependent three-dimensional Monte Carlo code for modelling radiation transport in supernovae and kilonovae. The code incorporates wavelength- and time-dependent opacities and predicts viewing-angle dependent spectra, light curves and polarization for both idealized and hydrodynamical explosion models. We apply the code to a kilonova model with two distinct ejecta components, one including lanthanide elements with relatively high opacities and the other devoid of lanthanides and characterized by lower opacities. We find that a model with total ejecta mass $M_mathrm{ej}=0.04,M_odot$ and half-opening angle of the lanthanide-rich component $Phi=30^circ$ provides a good match to GW 170817 / AT 2017gfo for orientations near the polar axis (i.e. for a system viewed close to face-on). We then show how crucial is the use of self-consistent multi-dimensional models in place of combining one-dimensional models to infer important parameters as the ejecta masses. We finally explore the impact of $M_mathrm{ej}$ and $Phi$ on the synthetic observables and highlight how the relatively fast computation times of POSSIS make it well-suited to perform parameter-space studies and extract key properties of supernovae and kilonovae. Spectra calculated with POSSIS in this and future studies will be made publicly available." @default.
• W2950794889 created "2019-06-27" @default.
• W2950794889 creator A5037794639 @default.
• W2950794889 date "2019-09-07" @default.
• W2950794889 modified "2023-10-16" @default.
• W2950794889 title "possis: predicting spectra, light curves, and polarization for multidimensional models of supernovae and kilonovae" @default.
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• W2950794889 doi "https://doi.org/10.1093/mnras/stz2495" @default.
• W2950794889 hasPublicationYear "2019" @default.
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