ultrarelativistic

ultrarelativistic

[¦əl·trə‚rel·ə·tə′vis·tik]
(relativity)
Having a speed that is nearly equal to the speed of light.
References in periodicals archive ?
The ultrarelativistic emission of charged particles by quasars along biaxial jets alludes to an electromagnetically active central engine of some form.
This is not a difficult process numerically, but in the limiting ultrarelativistic case C [right arrow] [infinity]--effectively a null geodesic - it becomes especially simple
The ultrarelativistic heavy nuclei in the jet are high-energy cosmic rays that would punch right through the local interstellar medium.
Radiated neutrinos are ultrarelativistic, a fact exploited by the Supernova Early Warning Systems to alert optical telescopes of impending supernova activity [57].
That ultrarelativistic jets of charged particles can be sustained for millions of years strongly suggests that the central black hole must itself be electrically charged.
Secondly, a dust-like energy momentum tensor for a purely radial motion with account of an ultrarelativistic collapsing matter and thermally emitted radiation is obtained in subsec.
2 A dust-like stress-momentum tensor of ultrarelativistic particles
In the ultrarelativistic limit, the equation of state is given by:
Neglecting the vacuum contribution in relation to the ultrarelativistic substratum, one turns back to the eqn.
The energy-momentum tensor of the field sets up an inhomogeneous viscous media, which is in the state of an ultrarelativistic gas.
2] (78) indicating that such fields are in the state of an ultrarelativistic gas--at positive density of the medium its inner pressure becomes positive, the medium is compressed.