Heterogeneity in ${}^{12}$CO/${}^{13}$CO Ratios Toward Solar-Type Young Stellar Objects

Rachel L. Smith, Klaus M. Pontoppidan, Edward D. Young +1

This study reports an unusual heterogeneity in [${}^{12}$C${}^{16}$O]/[${}^{13}$C${}^{16}$O] abundance ratios of carbon monoxide observed in the gas phase toward seven ~ solar-mass YSOs an…