Multiple outflows in IRAS 19410+2336

Abstract

Plateau de Bure Interferometer high-spatial resolution CO observations combined with near-infrared H2 data disentangle at least seven (possibly even nine) molecular outflows in the massive star-forming region IRAS 19410+2336. Position-velocity diagrams of the outflows reveal Hubble-like relationships similar to outflows driven by low-mass objects. Estimated accretion rates are of the order of 10-4 M⊙ yr -1, sufficiently high to overcome the radiation pressure and form massive stars via disk-mediated accretion processes. The single-dish large-scale mm continuum cores fragment into several compact condensations at the higher spatial resolution of the PdBI which is expected due to the clustering in massive star formation. While single-dish data give a simplified picture of the source, sufficiently high spatial resolution resolves the structures into outflows resembling those of low-mass star-forming cores. We interpret this as further support for the hypothesis that massive stars do form via disk-accretion processes similar to low-mass stars.