Disk fragmentation in high-mass star formation

Context. Increasing evidence suggests that, similar to their low-mass counterparts, high-mass stars form through a disk-mediated accretion process. At the same time, formation of still necessitates high rates, and hence, gas densities, which in turn can cause disks become unstable against gravitational fragmentation. Aims. We study kinematics fragmentation disk around star forming region AFGL 2591-VLA 3 was hypothesized be fragmenting based on observations that show multiple outflow directions. Methods. use new set high-resolution (0′′.19) IRAM/NOEMA at 843 μm towards VLA allow us resolve its disk, characterize fragmentation, kinematics. In addition continuum emission, our spectral setup targets warm dense tracers such as HCN, HC N SO 2 , well vibrationally excited HCN lines. Results. The resolution line emission maps reveal fragments with subsolar masses within inner ~1000 AU 3. Furthermore, velocity field observed shows behavior larger scale studied CORE project 1.37 mm. Conclusions. present first observational for 3, source thought single core. While themselves are low-mass, rotation is dominated by protostar mass 10.3 ± 1.8 M ⊙ . These data also NOEMA Band 4 obtain highest currently achievable spatial (sub-)mm wavelengths strong northern sources.