A supermassive black hole, designated RACS J0320-35, is challenging our understanding of astrophysics. Located a staggering 12.8 billion light-years away, this cosmic behemoth is growing at an unprecedented rate – 2.4 times the theoretical Eddington limit. This limit, named after the astrophysicist Arthur Eddington, represents the maximum rate at which a black hole can accrete matter before radiation pressure counteracts gravity. The discovery, made using data from NASA's Chandra X-ray Observatory, has left scientists baffled.
RACS J0320-35, with a mass approximately a billion times that of our sun, is already classified as supermassive. Yet, it continues to grow at an astonishing rate, accumulating an estimated 300 to 3,000 solar masses annually. This voracious appetite is fueled by the accretion of vast quantities of gas, dust, and stellar debris, generating intense radiation detectable by Chandra. The sheer amount of X-rays emitted by RACS J0320-35 surpasses any other black hole observed during the universe's first billion years.
Luca Ighina, a study author from the Harvard-Smithsonian Center for Astrophysics, described the findings as "shocking." The implications are significant. The current theoretical understanding suggests that exceeding the Eddington limit should halt a black hole's growth due to the overwhelming outward pressure of radiation. However, RACS J0320-35 is defying this expectation, leaving astronomers to re-evaluate existing models of black hole formation and growth.
The black hole's immense distance, 12.8 billion light-years, means we are observing it as it existed 920 million years after the Big Bang. This observation offers a unique glimpse into the early universe and the rapid evolution of supermassive black holes during that epoch. Further research is crucial to unravel the mysteries surrounding RACS J0320-35 and potentially refine our understanding of black hole physics, offering insights into the fundamental forces governing the cosmos.
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Originally published at: https://www.dailymail.co.uk/sciencetech/article-15121429/monster-black-hole-2-4-times-limit.html
