In a new research paper published in Monthly Notices of the Royal Astronomical Society, astronomers from the University of Leicester explain for the first time how the “excessive diet” of fresh material in black holes has led to emissions reaching nearly a third of the speed of light.
This image illustrates Seyfert Galaxy PG1211+143. Image credits: Centre Donna Astromyk destrasbourg/Sinbad/SDSS.
The intense outflow of ionized gases has raised significant concerns at the ESA’s XMM-Newton X-ray observatory since its initial detection by University of Leicester astronomers in 2001, now recognized as a distinctive trait of the luminous active galactic nuclei (AGNs).
Professor Ken Pound and Dr. Kim Page from Leicester remarked:
“The black hole’s size increases with its mass, with a solar mass black hole having a radius of about 3 km.”
“Stellar mass black holes are prevalent across galaxies, often forming from the dramatic collapse of massive stars; however, ultra-massive black holes can be found in the nuclei of almost all galaxies except the smallest external ones.”
In 2014, astronomers undertook a five-week investigation of an ultra-massive black hole in the distant Seyfert Galaxy PG1211+143, located approximately 1.2 billion light-years from the constellation Coma Berenices.
Utilizing ESA’s XMM-Newton Observatory, they observed counter-inflows, accumulating at least 10 Earth masses near the black hole.
In their latest study, they detected a powerful new outflow traveling at 0.27 times the speed of light, initiated shortly thereafter. The gravitational energy released as material is drawn into the black hole is heated to millions of degrees, producing an overwhelming radiant pressure.
“Establishing a direct causal relationship between significant, temporary inflows and the resulting outflows offers an exciting perspective for observing the growth of supermassive black holes through continuous monitoring of the hot relativistic winds linked with new material accretion,” stated Professor Pound.
“PG1211+143 has been the focus of University of Leicester X-ray astronomers using ESA’s XMM-Newton Observatory since its launch in December 1999.”
“Initial findings surprisingly revealed a counterflow of rapid movements, reaching 15% of the speed of light (0.15c), affecting stellar formation (and consequently the growth) of the host galaxy.”
“Subsequent observations have shown that such winds are a common characteristic of bright AGNs.”
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Ken Pounds & Kim Page. 2025. Observations of the Eddington-style outflow from the bright Seyfert Galaxy PG1211+143. mnras 540(3): 2530-2534; doi: 10.1093/mnras/staf637
Source: www.sci.news
