Astronomers See Origin of Sagittarius A* Black Hole Glow

Sagittarius A
Sagittarius A

A group of space experts, driven by Radboud University PhD scholar Sara Issaoun, have at long last possessed the capacity to see through these mists and to ponder what makes the black hole illuminate. Issaoun finished this work while partaking in the Predoctoral Program at the Smithsonian Astrophysical Observatory in Cambridge, MA.

Sagittarius A

"The origin of the radiation from Sagittarius A* (Sgr A*) has been bantered for a considerable length of time," says Michael Johnson of the Center for Astrophysics Harvard and Smithsonian (CfA).

A few models anticipate that the radiation originates from the disk of material being gulped by the black holes, while others credit it to a stream of material shooting far from the black hole. Without a keener perspective of the black hole, we can’t prohibit either probability.

The group utilized the system of Very Long Baseline Interferometry (VLBI), which joins numerous telescopes to shape a virtual telescope the extent of the Earth. The conclusive development was preparing the amazing ALMA exhibit of telescopes in northern Chile with another staging framework. This enabled it to join the GMVA, a worldwide system of twelve different telescopes in North America and Europe.


Issaoun, et al., “The Size, Shape, and Scattering of Sagittarius A* at 86 GHz: First VLBI with ALMA,” ApJ, 2019; doi:10.3847/1538-4357/aaf732

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