Astronomers have reported a new type of outbursts from black holes.

Scientists have discovered the galaxy SDSS J110546.07+145202.4, which has remained unusually bright in the radio range for more than eight years. The radiation source is located near the galaxy's central black hole and, according to the researchers, may be the first example of a new class of objects with long-lasting radio bursts. This was reported in the magazine Phys.org .

Usually, short-term radio sources associated with the centers of galaxies persist for several days or weeks. However, in the case of SDSS J110546.07+145202.4, the radio signal has not only increased dramatically by more than 20 times, but also has not shown signs of weakening for several years.

The galaxy is located about 1.8 billion light-years from Earth in the constellation Leo. Scientists estimate that its radio emission is about 10 quadrillion times more intense than that of the Sun. Phil Edwards, one of the authors of the paper, noted that this is a prototype of a new class of galaxies experiencing rapid changes in the radio range.

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The researchers believe that the flare is associated with a central black hole of relatively small mass. At the same time, it grows rapidly due to the accretion of matter. Stephanie Komossa, head of the work from the Max Planck Institute for Radio Astronomy, stressed that bright radio emission from rapidly growing light black holes is rare in itself, and the transition of such an object to a long-term radio-bright state has not been observed before.

According to the team, more matter than usual has been entering the black hole for several years. This could launch a jet, a narrow stream of particles moving at almost the speed of light and emitting radiation. However, the exact cause of the influx of the substance and the unusual duration of the outbreak has not yet been established.

The object is of particular interest because its properties resemble the conditions of the early universe. The small mass and rapid growth of the central black hole are characteristic of galaxies that existed in the early stages of cosmic history. At the same time, SDSS J110546.07+145202.4 is relatively close by space standards, which makes it a convenient "laboratory" for observations.

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On June 29, Universe Today magazine reported the detection of radio echoes from the eating of stars by black holes. According to the publication, months or years after the events, black holes continue this process in the form of powerful matter emissions.