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- W3204285596 abstract "We report on the extinction properties in the fields around the clusters NGC 1854, NGC 1856, and NGC 1858 in the bar of the Large Magellanic Cloud. The colour-magnitude diagrams of the stars in all these regions show an elongated red giant clump that reveals a variable amount of extinction across these fields, ranging from Av~0.2 to Av~1.9, including Galactic foreground extinction. The extinction properties nonetheless are remarkably uniform. The slope of the reddening vectors measured in the (V-I,V) and (B-I,B) colour-magnitude planes is fully in line with the Av/E(B-V)~5.5 value found in the outskirts of 30 Dor. This indicates the presence of an additional grey extinction component in the optical requiring big grains to be about twice as abundant as in the diffuse Galactic interstellar medium (ISM). Areas of higher extinction appear to be systematically associated with regions of more intense star formation, as measured by the larger number of stars more massive than 8 Msun, thus making injection of big grains into the ISM by SNII explosion the likely mechanism at the origin of the observed grey extinction component." @default.
- W3204285596 created "2021-10-11" @default.
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- W3204285596 date "2021-09-28" @default.
- W3204285596 modified "2023-09-27" @default.
- W3204285596 title "Extinction in the Large Magellanic Cloud Bar around NGC1854, NGC1856, and NGC1858" @default.
- W3204285596 hasPublicationYear "2021" @default.
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