2024
DOI: 10.3847/1538-3881/ad6cd6
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The Galactic Center in Color: Measuring Extinction with High-proper-motion Stars

Zoë Haggard,
Andrea M. Ghez,
Shoko Sakai
et al.

Abstract: The Milky Way’s central parsec is a highly extinguished region with a population of high-proper-motion stars. We have tracked 145 stars for ∼10 yr at wavelengths between 1 and 4 μm to analyze extinction effects in color–magnitude space. Approximately 30% of this sample dims and reddens over the course of years, likely from the motion of sources relative to an inhomogeneous screen of dust. We correct previous measurements of the intrinsic variability fraction for differential extinction effects, resulting in a … Show more

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