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- W1488000957 abstract "Type Ia supernovae (SNe Ia) are powerful cosmological standardizable candles and the most precise distance indicators. However, a limiting factor in their use for precision cosmology rests on our ability to correct for the dust extinction toward them. SN 2014J in the starburst galaxy M82, the closest detected SN~Ia in three decades, provides unparalleled opportunities to study the dust extinction toward an SN Ia. In order to derive the extinction as a function of wavelength, we model the color excesses toward SN 2014J, which are observationally derived over a wide wavelength range in terms of dust models consisting of a mixture of silicate and graphite. The resulting extinction laws steeply rise toward the far ultraviolet, even steeper than that of the Small Magellanic Cloud (SMC). We infer a visual extinction of $A_V approx 1.9~rm mag$, a reddening of $E(B-V)approx1.1~ rm mag$, and a total-to-selective extinction ratio of $R_V approx 1.7$, consistent with that previously derived from photometric, spectroscopic, and polarimetric observations. The size distributions of the dust in the interstellar medium toward SN 2014J are skewed toward substantially smaller grains than that of the Milky Way and the SMC." @default.
- W1488000957 created "2016-06-24" @default.
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- W1488000957 date "2015-07-08" @default.
- W1488000957 modified "2023-10-02" @default.
- W1488000957 title "PHYSICAL DUST MODELS FOR THE EXTINCTION TOWARD SUPERNOVA 2014J IN M82" @default.
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- W1488000957 doi "https://doi.org/10.1088/2041-8205/807/2/l26" @default.
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