Spectra extracted from SPHERE-IFS data, once a radial profile, has been subtracted. (a) Spectrum(mean contrast versus wavelengths) extracted in area where “elongated structure” is identified, normalized for stellar peak. The location of the helium and hydrogen (Paβ) line emission are labeled. The blue line shows the linear curve utilized to normalize the spectrum, and reported in the bottom panel. (b) Spectrum normalized to linear fit indicated in top panel. The grey-shaded area shows the telluric band. (c) Same as panel a, but for a region closer to the disk identified by Mesa et al. (2019). (d) Same as panel b for disk.