“This is very important to us”: Researchers make magnetic fields visible very close to the black hole

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For the first time, magnetic fields in the immediate vicinity of the black hole could be detected and made visible. This provides the basis for research into the so-called jets.

In 2019, the EHT delivered the first picture of a black hole – a scientific sensation.

dpa

  • Researchers have made new discoveries while investigating a black hole in the galaxy Messier 87.

  • For the first time, magnetic fields could be detected in the vicinity of the hole.

  • According to experts, the discovery is extremely relevant.

About two years ago researchers published the image of a black hole for the first time. Now they have taken a further step in investigating the gravity monster in the distant galaxy Messier 87 (M87). For the first time, magnetic fields in the immediate vicinity of the black hole could be detected and made visible, as the Max Planck Institute for Radio Astronomy in Bonn announced on Wednesday. «That is very important to us. This enables us to better understand how the luminous structures are created in the vicinity of a black hole, ”explained Anton Zensus, director at the institute.

The data once again come from the “Event Horizon Telescope” (EHT), for which scientists have interconnected various radio telescopes around the world. In 2019, the EHT delivered the first picture of a black hole – a scientific sensation. Since then, the analysis of the data has continued. Now the EHT observations show the first image of the magnetic field distribution in the bright ring around the so-called shadow of the black hole in the center of M87.

The key to this was provided by the observation that the radio radiation is polarized, i.e. has a non-random direction of oscillation. Polarized radiation is considered by astrophysicists to be a reliable indicator of the presence of magnetic fields.

Understand the formation of jets

Magnetic fields, in turn, play a crucial role in the formation of so-called jets. The reason for this is that black holes absorb large amounts of matter. However, some of this matter does not fall into the black hole, but is shot out into space as super-hot plasma. “If we map the immediate vicinity of the black hole and also understand the magnetic fields, we can ultimately begin to understand how these jets are formed,” explained Anton Zensus. “We are measuring something that will be important for the interpretation of the jets.”

In black holes, the mass of a few to several billion suns is compressed into an extremely small region. Due to the immense gravity, not even light can escape from the direct environment, hence the name. Black holes can arise, for example, when burnt-out giant stars collapse under their own weight. The exact origin of supermassive holes like in M87 has not yet been clarified.

(DPA / cat)





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https://www.20min.ch/story/forschende-machen-magnetfelder-ganz-nah-an-schwarzem-loch-sichtbar-482123488560

important Researchers magnetic fields visible close black hole

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