First detections of CO absorption in the Magellanic Clouds and direct measurement of the CO-to-H${}_2$ ratio

Sergei Balashev, Daria Kosenko, Pasquier Noterdaeme

Molecular hydrogen (H${}_2$) is by far the most abundant molecule in the Universe. However, due to the low emissivity of H${}_2$, carbon monoxide (CO) is widely used instead to trace m…