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• W3089018571 endingPage "4686" @default.
• W3089018571 startingPage "4666" @default.
• W3089018571 abstract "The thermal emission of dust is one of the most important tracers of the interstellar medium: multi-wavelength photometry in the far-infrared (FIR) and submillimeter (submm) can be fitted with a model, providing estimates of the dust mass. The fit results depend on the assumed value for FIR/submm opacity, which in most models - due to the scarcity, until recently, of experimental measurements - is extrapolated from shorter wavelengths. Lab measurements of dust analogues, however, show that FIR opacities are usually higher than the values used in models and depend on temperature, which suggests that dust mass estimates may be biased. To test the extent of this bias, we create multi-wavelength synthetic photometry for dusty galaxies at different temperatures and redshifts, using experimental results for FIR/submm dust opacity, then we fit the synthetic data using standard dust models. We find that the dust masses recovered by typical models are overestimated by a factor 2 to 20, depending on how the experimental opacities are treated. If the experimental dust samples are accurate analogues of interstellar dust, therefore, current dust masses are overestimated by up to a factor 20. The implications for our understanding of dust, both Galactic and at high redshift, are discussed." @default.
• W3089018571 created "2020-10-01" @default.
• W3089018571 creator A5007552018 @default.
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• W3089018571 creator A5052844813 @default.
• W3089018571 date "2020-09-26" @default.
• W3089018571 modified "2023-10-17" @default.
• W3089018571 title "Systematic errors in dust mass determinations: insights from laboratory opacity measurements" @default.
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• W3089018571 doi "https://doi.org/10.1093/mnras/staa2911" @default.
• W3089018571 hasPublicationYear "2020" @default.
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