New Evidence for a Flux-independent Spectral Index of Sgr A* in the Near-infrared

Hadrien Paugnat, Tuan Do, Abhimat K. Gautam +11

In this work, we measure the spectral index of Sagittarius A* (Sgr A*) between the $H$ (1.6 $\mu$m) and $K^{\prime }$ (2.2 $\mu$m) broadband filters in the near-infrared (NIR), sampling o…