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Image Credit: Physicsworld
Black hole’s shadow changes from one year to the next
- New statistical analyses of the supermassive black hole M87* by the Event Horizon Telescope explain changes observed since the first image was taken.
- The rotational axis of M87* points away from Earth, and turbulence within the accretion disc affects its appearance.
- The black hole's shadow size and shape can be used to infer its mass, which is about 6.5 billion times that of our Sun.
- Analysis focuses on the bright ring outside the shadow, revealing insights into the acceleration of matter and the role of magnetic fields.
- Statistical techniques were applied to observations from 2017 and 2018, showing changes in the appearance of the bright ring from year to year.
- The observational data supports computer simulations of the turbulent environment around the black hole.
- The EHT used very long baseline interferometry involving a global network of telescopes to observe M87* in detail.
- The multi-epoch analysis provides a new statistical approach to studying black hole systems and their dynamical behavior over time.
- Ongoing analysis of observations made in 2021 and 2022 will offer further insights into black hole accretion environments.
- Future research aims to provide deeper insights into the astrophysics of strong gravity and magnetized plasma near the event horizon.
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