Sentences with phrase «blazar jets»

«We typically see apparent speeds in blazar jets that are about five times the speed of light, and that corresponds to a true speed of more than 98 percent of light speed,» Piner said.

Piner and his colleagues observed the blazars again in 2002 and 2003 with much longer observations, and were able to confirm the high - speed motions in the faint blazar jets.

Based on other properties of blazars, the scientists believe that their interpretation of the data is accurate and that they have measured the extremely fast speeds in the three blazar jets.

They say the electrons, protons and other particles accelerated in blazar jets leave a specific «fingerprint» in the infrared light they emit.

Not exact matches

They could have emerged from gamma - ray bursts, mysterious and short - lived cataclysms that briefly rank as the brightest objects in the universe; shock waves from exploding stars; or so - called blazars, jets of energy powered by supermassive black holes.

Astronomer Fabrizio Nicastro of the Harvard - Smithsonian Center for Astrophysics in Cambridge, Massachusetts, and his colleagues monitored the galaxy Markarian 421, which contains a «blazar» — an active black hole that aims powerful jets of energy toward Earth.

This is a blazar — a rare case in which one of the two jets happens to be directed towards Earth so that the astronomers look directly into the jet along the longitudinal axis.

It turns out that blazars are powered surprisingly like the exhausts of jet engines, albeit on a cosmic scale, says astronomer and lead author Alan Marscher of Boston University.

Instead of streaming out of a metal casing and turbine, a blazar's jets «are confined and focused by coiled magnetic fields originating near the [supermassive] black hole.»

«These blazars have jets that are like fountains.

Taking advantage of the extremely sharp radio «vision» of the continent - wide VLBA, the scientists tracked individual features in the jets of three blazars at distances from Earth ranging from 7.3 to 9 billion light - years.

The two different classes of jet - spewing active galaxies called blazars may, in fact, be a single hybrid type that evolves over time, according to new research.

When these jets happen to be aimed nearly toward the Earth, the objects are called blazars.

Blazars appear to produce more gamma radiation than other types of active galaxies, but this may be because one of their jets is pointed toward Earth.

(Blazars are generally defined as quasars that are viewed jet - on).

A Boston University team led by Svetlana Jorstad earlier had identified the three blazars as having potentially very high jet speeds based on VLBA observations in the mid-1990s.

Blazars occur when the jet of a supermassive black hole is pointing toward Earth.

When a jet faces Earth, that's a blazar.