National Astronomical Observatory of Japan

Hybrid Black Hole Jet: A Novel Jet Model Revealed by Supercomputer Simulations

| Science

Structure of a hybrid jets. The novel jet revealed by supercomputer simulations. Jets whose speed is nearly light velocity is accelerated by radiation pressure force, and collimated by magnetic tower.

A novel jet model was revealed by supercomputer simulations by a research group of Center for Computational Astrophysics (NAOJ) and Department of Astronomy (Kyoto Univ.). Numerical calculations are performed by a supercomputer, Cray XT4 of NAOJ.

Although the black holes swallow the matter, a part of matter is ejected from the vicinity of the black holes. Such ejected matter has high-velocity (nearly light velocity) and is collimated, so that it is called black hole jets. The black hole jet is one of the most powerful phenomena. However, the formation-mechanism of the jets is not understood yet.

The research group for the first time developed a novel type jet, by performing high-resolution hydrodynamic simulations in which radiation and magnetic fields are coupled. Since the radiation and magnetic effects are well combined in the new jet, the jet is named as “hybrid black hole jet”.

It will be studied that larger simulations of black hole jet and the influence for the star-formation and galaxy-evolution via the jets.

A concept image of the hybrid jet.

Paper information

S. Takeuchi, K. Ohsuga, and S. Mineshige "A Novel Jet Model: Magnetically Collimated, Radiation-Pressure Driven Jet" Publ. Astron. Soc. Japan 62, pp.L43-L47 (2010)