supermassive black hole tagged posts

Dark matter, not a black hole, could power Milky Way’s heart

'Dark matter, not a black hole, could power Milky Way's heart'
Artistic representation of the Milky Way, where the innermost stars move at near relativistic speeds (defined as velocities that constitute a significant fraction of the speed of light, typically considered to be 10% or more) around a dense core of dark matter, with no black hole at the centre. At greater distances, the halo part of the same invisible dark matter distribution continues to shape the motions of stars in the outskirts of our galaxy, tracing the characteristic rotation curve. Credit: Valentina Crespi et al. License type Attribution (CC BY 4.0)

Our Milky Way galaxy may not have a supermassive black hole at its center but rather an enormous clump of mysterious dark matter exerting the same gravitational influence, astronomers say...

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After nearly 100 years, scientists may have detected dark matter

After nearly 100 years, scientists may have detected dark matter
Gamma-ray intensity map excluding components other than the halo, spanning approximately 100 degrees in the direction of the Galactic center. The horizontal gray bar in the central region corresponds to the Galactic plane area, which was excluded from the analysis to avoid strong astrophysical radiation. Credit: Tomonori Totani, The University of Tokyo

In the early 1930s, Swiss astronomer Fritz Zwicky observed galaxies in space moving faster than their mass should allow, prompting him to infer the presence of some invisible scaffolding—dark matter—holding the galaxies together. Nearly 100 years later, NASA’s Fermi Gamma-ray Space Telescope may have provided direct evidence of dark mattner, allowing the invisible matter to be “seen” for the very first time.

The elusive nature of ...

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Black hole blast outshines 10 trillion Suns

A distant supermassive black hole has set a new cosmic record, unleashing the brightest flare ever seen as it devoured a gigantic star that wandered too close. A colossal black hole 10 billion light-years away has been caught devouring one of the universe’s biggest stars, unleashing a flare 30 times brighter than any seen before. The flare, detected by Caltech’s ZTF, likely marks a tidal disruption event — when a star is shredded by a black hole’s gravity.

The Universe’s most massive stars typically end their lives in spectacular explosions known as supernovae before collapsing into black holes. But one enormous star seems to have met a very different fate...

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Astronomers spot the ‘Eye of Sauron’ in deep space

A stunning new image of a cosmic jet has helped astronomers unlock the mystery behind the usually bright emission of high-energy gamma rays and neutrinos from a peculiar celestial object. The source is a blazar—a type of active galaxy powered by a supermassive black hole devouring matter a the heart of a galaxy. They have captured what looks like the mythical “Eye of Sauron” in the distant universe and may have just solved a decade-long cosmic puzzle.

The researchers made a discovery that will help in understanding how a seemingly slow-moving blazar, known as PKS 1424+240, could be one of the brightest sources of high-energy gamma rays and cosmic neutrinos ever observed. The work is published in the journal Astronomy & Astrophysics.

Located billions of light-years away, the bl...

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