Sgr A tagged posts

Using the MIRI instrument onboard the James Webb Space Telescope, an international team of scientists made the first-ever detection of a mid-IR flare from Sagittarius A*, the supermassive blackhole at the heart of the Milky Way. In simultaneous radio observations, the team found a radio counterpart of the flare lagging behind in time. The paper is published on the arXiv preprint server.

Scientists have been actively observing Sagittarius A* (Sgr A)—a supermassive black hole roughly 4 million times the mass of the sun— since the early 1990s. Sgr A regularly exhibits flares that can be observed in multiple wavelengths, allowing scientists to see different views of the same flare and better understand how it emits light and how the emission is generated...

A multi-wavelength image of the field around Sagitarrius A*, the supermassive black hole at the center of the Milky Way galaxy (SgrA* is an imperceptible speck located at the center of this large field of sky). Astronomers have used an array of millimeter-wave telescope facilities to detect a small asymmetry that might be associated with the shadow of the black hole. Credit: NASA

The supermassive black hole candidate at the center of our Galaxy (associated with the radio source Sgr A*) is a prime candidate for studying the physical phenomena associated with accretion on to a supermassive black hole...