Reconnection X-winds: spin-down of low-mass protostars

Details Reconnection X-winds: spin-down of low-mass protostars Reconnection X-winds: spin-down of low-mass protostars

Feb 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000mnras.312..387f&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 312, Issue 2, pp. 387-397.

Astronomy and Astrophysics

Astronomy

39

Accretion, Accretion Discs, Mhd, Stars: Formation, Stars: Pre-Main-Sequence, Stars: Rotation, Ism: Jets And Outflows

Scientific paper

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 10-20per cent of the break-up velocity during the embedded phase.

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