Using VVV red clump stars, the authors derive near-infrared extinction ratios A(Ks)/E(H-Ks)=1.44, A(Ks)/E(J-Ks)=0.423, A(H)/E(J-H)=1.25, implying a steep lambda^-2.0 to -2.3 extinction law toward the Galactic center.
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Interstellar Extinction Law toward the Galactic Center IV: J, H, and Ks Bands from VVV Red Clump Stars
Using VVV red clump stars, the authors derive near-infrared extinction ratios A(Ks)/E(H-Ks)=1.44, A(Ks)/E(J-Ks)=0.423, A(H)/E(J-H)=1.25, implying a steep lambda^-2.0 to -2.3 extinction law toward the Galactic center.