Astronomers take 'heartbeat' of black hole

Dragon

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Post n°1

Astronomers take 'heartbeat' of black hole

Post by Dragon Wed Mar 23, 2022 1:08 am

A black hole gets a large corona before it emits jets.

This is revealed, among other things, by the heartbeat graph that an international team of astronomers has made of a black hole and a star orbiting around each other.

The team, led by Mariano Méndez from the University of Groningen (the Netherlands), will publish their results on Monday in Nature Astronomy.

Source

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Astronomers take 'heartbeat' of black hole 334pu7m

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Dragon

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Post n°2

Re: Astronomers take 'heartbeat' of black hole

Post by Dragon Wed Mar 23, 2022 1:09 am

Astronomers take 'heartbeat' of black hole Astronomers-take-heart-1

Credit: Méndez et al.

Two screenshots of the animation of two phases of a black hole.

On the left, a big and hot corona, the disk of material depicted in blue, has formed around the center of the black hole and there is no jet.

On the right, the corona is smaller and cooler (depicted in red/orange) and the black hole ejects the jet.

Source

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Astronomers take 'heartbeat' of black hole 334pu7m

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Dragon

Dragon: Senior Administrator; Posts : 10677
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Post n°3

Re: Astronomers take 'heartbeat' of black hole

Post by Dragon Wed Mar 23, 2022 1:27 am

Astronomers take 'heartbeat' of black hole Astronomers-take-heart

Credit: Méndez et al.

Fragment of the 'heartbeat' of a black hole. The horizontal x-axis shows the days. The green curve is the radio emission.

At the green peaks the jet is the strongest.

The red and blue dots show the X-ray radiation and are a measure of the size of the corona.

The blue dots show that the corona is smallest and the jet is strongest, so the jets always occur when the corona is smallest.

Source

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Astronomers take 'heartbeat' of black hole 334pu7m