Now a senior associate at the NASA Goddard Space Center in Maryland, Parfrey is the lead author of a study published on January 23 in Physical Review Letters,
] Simulations for the first time combine a theory that explains how electric currents around a black hole twist magnetic fields in forming jets, as a separate theory explains how particles pass through a black hole point. return – the horizon of events – may seem to a distant observer to carry negative energy and reduce the total energy of black hole rotation. The black hole actually loses the mass as a result of flooding these particles with "negative energy". Computer simulations have difficulty in modeling all complex physics involved in the release of plasma jets, which need to take into account the creation of pairs of electrons and positrons, the particle acceleration mechanism and the emission of light into jets
Berkeley's Laboratory has contributed significantly to plasma simulations over a long history. Plasma is a gaseous mixture of charged particles, which is the most common state of matter. Parfrey says she realizes that more complicated simulations to better describe jets will require a combination of expertise in plasma physics and the general theory of "I thought it was a good time to try and get these two together" , he said.
Running at the supercomputer center at NASA Ames Science Center in Mountain View, California, the simulations include new ones. Numerical techniques that provide the first unconventional plasma model in which collisions between charged particles do not play an important role – in the presence of a strong gravitational field associated with a black hole. Simulations naturally produce effects, known as the Blandford-Znajek mechanism, which describes the twisting magnetic fields that form jets, and a separate Penrose process that describes what happens when the negative energy
Penrose Process, " that it does not necessarily have to contribute so much to extracting the energy of black hole rotation, "said Parfrey," is probably directly related to the electric currents that are distorted. "Although more detailed than some earlier models, Parfrey notes, that the simulations of his team in are still playing catching up with the observations and somehow idealized to simplify the calculations required to perform the simulations
19659004] The team intends to better model the process by which to create electron-positron pairs in jets to the plasma jet distribution and radiation emission are more realistic than the observations, and they are also planning to expand the scope of simulations to include the flow of seizure around the horizon of black hole events, known as its accretion stream.
"We hope to provide a more consistent picture of the whole issue," he said.
Other participants in the study are Alexander Filipov, who is a post-doctorate from Einstein at the University of California at Berkeley, and Benoit Cerruti, CNRS researcher at the University of Grenoble Alpine in France. Parfrey and Philipoff were members of the Center for Astronomy and Theoretical Astrophysics at the University of California at Berkeley and Philipov at the Flatiron Institute in New York. [email protected] NASA High-End Computing Program, TGCC, CINES, and Simons Foundation.
Publication: Kyle Parfrey, et al., & Quot; First Principles of Plasma Black Bore Shooting Simulations & quot ;, Physical Review Letters, 2018; doi: 10.1103 / PhysRevLett.122.035101