The CO-to-H${}_2$ Conversion Factor in the Central Molecular Zone of the Milky Way using CO isotopologues

Mikito Kohno, Yoshiaki Sofue

We performed correlation analyses between the ${}^{12}$CO and ${}^{13}$CO $J=$1-0 line intensities in order to derive the variability of the CO-to-H${}_2$ conversion factor ($X_{\rm CO,…