期刊
ASTRONOMY & ASTROPHYSICS
卷 408, 期 2, 页码 601-610出版社
E D P SCIENCES
DOI: 10.1051/0004-6361:20030795
关键词
accretion, accretion disks; stars : early type; stars : formation; ISM : jets and outflows
Plateau de Bure Interferometer high-spatial resolution CO observations combined with near-infrared H-2 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-circle dot 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.
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