Reddening Maps of the Large and Small Magellanic Cloud based on OGLE-IV Red Clump Stars

Dorota M. Skowron

Here we present the most extensive and detailed reddening maps of the Magellanic Clouds inferred from the color properties of Red Clump stars. The analysis is based on the deep photometric maps from the fourth phase of the Optical Gravitational Lensing Experiment (OGLE-IV). We refined methods of calculating the RC color to obtain the highest possible accuracy of reddening maps based on RC stars. Using spectroscopy of red giants, we found the metallicity gradient in both Magellanic Clouds, which causes a slight decrease of the intrinsic RC color with a distance from the galaxy center of about 0.002 mag/deg in the LMC and between 0.003 and 0.009 mag/deg in the SMC.

Proceedings of the Polish Astronomical Society, vol. 12, 179-182 (2022)

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