Relativistic Jets and Collapsars

Details Relativistic Jets and Collapsars Relativistic Jets and Collapsars

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.3803z&link_type=abstract

American Astronomical Society, 198th AAS Meeting, #38.03; Bulletin of the American Astronomical Society, Vol. 33, p.837

Astronomy and Astrophysics

Astronomy

2

Scientific paper

In order to study the relativistic jets from collapsars, we have developed a special relativistic multiple-dimensional hydrodynamics code similar to the GENESIS code (Aloy et al., ApJS, 122, 151). The code is based on the PPM interpolation algorithm and Marquina's Riemann solver. Using this code, we have simulated the propagation of axisymmetric jets along the rotational axis of collapsed rotating stars (collapsars). Using the progenitors of MacFadyen, Woosley, and Heger, a relativistic jet is injected at a given inner boundary radius. This radius, the opening angle of the jet, its Lorentz factor, and its total energy are parameters of the problem. A highly collimated, relativistic outflow is observed at the surface of the star several seconds later. We will discuss the hydrodynamical focusing of the jet, it's break out properties, time evolution, and sensitivity to the adopted parameters.

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