Discovery of thermal radio recombination line emission toward the high-mass protostar IRAS18162$-$2048

R. Fedriani, J. F. Gomez, Y. Cheng +7

The physical conditions within the innermost few tens of au of high-mass protostars ($M_{\ast }>8M_{\odot }$) remain largely unexplored. At these scales, ionised emission may trace photoio…