hole
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Space & Cosmos
Discovery of distant blazars supports rapid black hole formation in the early universe
Artist’s impression of a bright, very early active galactic nucleus discovered by Bañados and his colleagues. This has fundamental implications for the growth of black holes during the first billions of years of cosmic history. Credit: NSF/AUI/NSF NRAO/B. Saxton Astronomers have discovered a key piece of the puzzle of how supermassive black holes were able to grow so quickly in…
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Physics
Extending the classical black hole inequality to the quantum domain
Scientists are studying the influence of quantum phenomena on the dynamics of black holes. Credit: NASA Goddard Space Flight Center/Jeremy Schnittman, cmglee. https://www.nasa.gov/feature/goddard/2019/nasa-visualization-shows-a-black-hole-s-warped-world. A recent study published in Physical Review Letters investigates quantum effects on the thermodynamics and geometry of black holes, focusing on extending two classical inequalities to the quantum realm. Black holes have been thoroughly studied through classical…
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Space & Cosmos
Black hole research questions Kerr solution assumptions
Left: A concrete realization of the Meisner-Sharp mass of Eq. (18) and parameters 𝑀0=10, ℓ=1, 𝑣𝑖=−20, 𝑣𝑓=1000, 𝑠1=1, 𝑠2=1/40. The radius of the outgoing shell is initially set to 𝑅(𝑣=30)=5. Right: As an illustrative example, the Meisner-sharp mass in the interior region of the output shell 𝑀+(𝑣,𝑅(𝑣)) 𝑚(𝑣)=−𝛽(1+𝜀cos(𝜔𝑣 ) )/𝑣)/𝑣𝑝 is 𝛽=1, 𝜔=1, 𝑝=2, 𝜀=0 (green solid line) or 𝜀=1…
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Environment
What’s going on with the hole in the ozone layer?
Measurements by the Copernicus Sentinel-5P satellite in 2023 reveal an ozone hole over Antarctica. Credit: ESA (with corrections to 2023 Copernicus Sentinel data processed by DLR) Scientists first sounded the alarm about human-caused destruction of the ozone layer in 1974, but it took several more years before the international community reached an agreement to ban chemicals that damage the ozone…
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Space & Cosmos
Astronomers discover black hole is ‘starving’ its host galaxy
Astronomers have used the NASA/ESA James Webb Space Telescope to confirm that a supermassive black hole may be robbing its host galaxy of the fuel it needs to form new stars. Using Webb, an international team co-led by the University of Cambridge observed a galaxy roughly the same size as the Milky Way in the early universe, about 2 billion…
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