Deep observations of O<sub>2</sub>toward a low-mass protostar with<i>Herschel</i>-HIFI
Deep observations of O<sub>2</sub>toward a low-mass protostar with<i>Herschel</i>-HIFI
According to traditional gas-phase chemical models, O2 should be abundant in molecular clouds, but until recently, attempts to detect interstellar O2 line emission with ground- and space-based observatories have failed. Following the multi-line detections of O2 with low abundances in the Orion and rho Oph A molecular clouds with Herschel, …