Collimated jets from the first core

Authors

  • Daniel J. Price,

    Corresponding author
    1. Monash Centre for Astrophysics (MoCA) and School of Mathematical Sciences, Monash University, VIC 3800, Australia
    Search for more papers by this author
  • Terrence S. Tricco,

    1. Monash Centre for Astrophysics (MoCA) and School of Mathematical Sciences, Monash University, VIC 3800, Australia
    Search for more papers by this author
  • Matthew R. Bate

    1. Monash Centre for Astrophysics (MoCA) and School of Mathematical Sciences, Monash University, VIC 3800, Australia
    2. School of Physics, University of Exeter, Stocker Road, Exeter EX4 4QL
    Search for more papers by this author

E-mail: daniel.price@monash.edu

ABSTRACT

We have performed smoothed particle magnetohydrodynamics (SPMHD) simulations demonstrating the production of collimated jets during collapse of 1 M molecular cloud cores to form the ‘first hydrostatic core’ in low-mass star formation. Recently, a number of candidate first-core objects have been observed, including L1448 IRS2E, L1451-mm and Per-Bolo 58, although it is not yet clear that these are first hydrostatic cores. Recent observations of Per-Bolo 58 in particular appear to show collimated, bipolar outflows which are inconsistent with previous theoretical expectations. We show that low-mass first cores can indeed produce tightly collimated jets (opening angles ≲10°) with speeds of ∼2–7 km s−1, consistent with some of the observed candidates. We have also demonstrated, for the first time, that such phenomena can be successfully captured in SPMHD simulations.

Ancillary