Zooming Back From a Black Hole
The first images ever taken of a black hole were released in April 2019. The images were captured with the Event Horizon Telescope (EHT). But that wasn t the only instrument to capture it. Now, researchers have released data from 19 observatories, providing new insights into this black hole, and enabling scientists to test Einstein s General Theory of Relativity. These recent findings have been published in We knew that the first direct image of a black hole would be groundbreaking, said study co-author Kazuhiro Hada of the National Astronomical Observatory of Japan. But to get the most out of this remarkable image, we need to know everything we can about the black hole s behavior at that time by observing over the entire electromagnetic spectrum.
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In 2019 astronomers lifted the veil on the monster black hole called Sagittarius A (Sgr A ) at the heart of our Milky Way Galaxy. Using computer modelling, astronomers to simulated the material inside the thick cloud of plasma, dust and gas surrounding Sgr A . The results pointed to the possibility of a relativistic jet coming from the supermassive black hole with an inclination that is aligned with Earth’s viewing point.
The Unveiling
An international team of astronomers recently used an Interferometric technique which combines many telescopes to form a virtual telescope the size of Earth to map out the exact properties of Sgr A . Using telescopes including the Atacama Large Milimeter/submilimeter Array (ALMA) in northern Chile, an image was produced with a resolution that allowed us to peer through the fog surrounding the supermassive black hole.
Center for Astrophysics
EHT Collaboration
Cambridge, MA – In April 2019, scientists released the first image of a black hole in galaxy M87 using the Event Horizon Telescope (EHT). However, that remarkable achievement was just the beginning of the science story to be told.
Data from 19 observatories released today promise to give unparalleled insight into this black hole and the system it powers, and to improve tests of Einstein’s General Theory of Relativity.
“We knew that the first direct image of a black hole would be groundbreaking,” says Kazuhiro Hada of the National Astronomical Observatory of Japan, a co-author of a new study published in The Astrophysical Journal Letters that describes the large set of data. “But to get the most out of this remarkable image, we need to know everything we can about the black hole’s behavior at that time by observing over the entire electromagnetic spectrum.”
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