Extended Data Fig. 1: Sample absorption-line spectra.

Normalized HST/COS spectra of the C IV λ 1548 (upper panels) and O VI λ 1031 (lower panels, red outlines) absorption lines in the LSR velocity frame, ordered by their LMC impact parameters (low to high). The normalized flux is shown in black, with 1σ uncertainties shaded in grey around them. The solid teal line shows the full Voigt profile fit to the C IV λ 1548, 1550 and O VI λ 1031, 1037 doublets, with individual Magellanic components shaded in red-orange hues, corresponding to the same colour scheme used in Fig. 1. Component centres are shown with tick marks. The dashed vertical line marks the 150 km s⁻¹ threshold used in this work. Greyed-out portions of the spectra are contaminated by higher-redshift absorbers and are not considered in our analysis. C IV λ 1550 spectra are shown in cases in which the C IV λ 1548 is highly contaminated. Further fit results for all ions and sightlines can be viewed at https://github.com/Deech08/HST_MagellanicCorona.