Dust in the Local Group
Aigen Li, Shu Wang, Jian Gao, B.W. Jiang
TL;DR
This review summarizes current understanding of dust extinction in the Milky Way, Local Group galaxies, and beyond, highlighting how dust affects light and reveals dust properties.
Contribution
It provides a comprehensive overview of dust extinction curves and their implications across different galaxies, integrating recent observational findings.
Findings
Dust extinction curves vary among galaxies
Extinction features inform dust composition
Understanding dust improves astrophysical measurements
Abstract
How dust absorbs and scatters starlight as a function of wavelength (known as the interstellar extinction curve) is crucial for correcting for the effects of dust extinction in inferring the true luminosity and colors of reddened astrophysical objects. Together with the extinction spectral features, the extinction curve contains important information about the dust size distribution and composition. This review summarizes our current knowledge of the dust extinction of the Milky Way, three Local Group galaxies (i.e., the Small and Large Magellanic Clouds, and M31), and galaxies beyond the Local Group.
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