Tuesday, June 6, 2023

Galaxy changes classification after targeting us with a blazar

Not all black holes rupture, but when they do, they rupture anywhere. If the jet shines on Earth, the object is called a blazar. -NASA/JPL-CALTECH

MADRID, March 21

The initial classification as a cosmic structure radio galaxy has been massively changed due to unique activity within its core, revealed in a new study.

PBC J2333.9-2343 is four thousand light-years across and has a burning core. A blazar is an active galactic nucleus (AGN) with a relativistic jet (a jet traveling at close to the speed of light) in direct view.

Blazars are extremely high energy objects and are considered one of the most powerful phenomena in the universe. Research has revealed that PBC J2333.9-2343, the jet cleverly changed its direction by up to 90 degrees, from being in the plane of the sky, to perpendicular to the line of sight, to point directly at us.

A blazar ball is made up of charged elementary particles such as electrons or protons that move at speeds close to the speed of light. These move in circles around a strong magnetic field, emitting radiation across the entire electromagnetic spectrum. For PBC J2333.9-2343, the jet is believed to originate around the supermassive black hole at its center.

The gate is pointed in our direction, the emission is greatly increased and can easily leave the rest of the galaxy. This, in turn, produces flashes of greater intensity than those originating from other radio galaxies, thus changing the categorization.

Management breaks down to us to determine how the galaxy is counted. When two bursts point towards the plane of the sky, they are classified as radio galaxies, but if one bursts towards us, the AGN galaxy is known as a blazar. As it shoots across the sky and is headed toward us, PBC J2333.9-2343 is stored as a radio galaxy with a fire at its center, the Royal Astronomical Society reports in a statement.

Changes in the direction of the bursts have been described in the past, for example with X-shaped radio galaxies, this is the first time such a phenomenon has been observed that does not suggest the presence of two different types of jet activity. observed morphology at radio frequencies: the change of direction seems to have occurred in the same nuclear explosion originating from the AGN.

The work was published in the Monthly Notices of the Royal Astronomical Society.

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