1. Carbon in the N159/N160 complex of the Large Magellanic Cloud

Israel, collaborating with Bolatto, Jackson (both Boston Univ.), Zhang (SAO) and Kim (Univ. of Illinois), mapped the actively star-forming regions N159 and N160 in the LMC in J=1-0 ¹³CO, J=2-1 and J=4-3 ¹²CO and in C^o. They found that previously mapped major CO cloud complexes are immersed in a large envelope of extended, low-level emission. This emission is optically thin in ¹²CO, and relatively bright in both C^o and C⁺. The distribution of neutral carbon peaks on a quiescent dense cloud in the complex, while in the more evolved northern region N160 C^o is anticorrelated with C⁺. Over the whole complex, they find that C⁺ is enhanced with respect to similar complexes in the Milky Way, whereas C^o is similar or reduced in emission. A possible explanation for this difference is relatively rapid ionization of C^oproduced by CO photodissociation.