In SN 1987A's inner ejecta, HCO+ is co-spatial with CO, and its two-line RADEX mass of 3–9×10^-6 solar masses implies hydrogen was mixed into the carbon-oxygen zones.
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HCO$^+$ and the Effect of Mixing in SN 1987A
In SN 1987A's inner ejecta, HCO+ is co-spatial with CO, and its two-line RADEX mass of 3–9×10^-6 solar masses implies hydrogen was mixed into the carbon-oxygen zones.