期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 312, 期 2, 页码 387-397出版社
BLACKWELL SCIENCE LTD
DOI: 10.1046/j.1365-8711.2000.03215.x
关键词
accretion, accretion discs; MHD; stars : formation; stars : pre-main-sequence; stars : rotation; ISM : jets and outflows
We investigate the interaction of a protostellar magnetosphere with a large-scale magnetic field threading the surrounding accretion disc. It is assumed that a stellar dynamo generates a dipolar-type field with its magnetic moment aligned with the disc magnetic field. This leads to a magnetic neutral line at the disc mid-plane and gives rise to magnetic reconnection, converting closed protostellar magnetic flux into open field lines. These are simultaneously loaded with disc material, which is then ejected in a powerful wind. This process efficiently brakes down the protostar to 10-20 per cent of the break-up velocity during the embedded phase.
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