Astronomers Correct Black Hole Growth Theories with Dust-Adjusted Mass Measurements

April 25, 2025
Astronomers Correct Black Hole Growth Theories with Dust-Adjusted Mass Measurements
  • In November 2024, astronomers identified LID-568 as a black hole dating back to 1.5 billion years after the Big Bang, initially suggesting it was consuming matter at an unrealistic rate for its early formation period.

  • The revised analysis utilized infrared light, which is less affected by dust, revealing that LID-568's mass is approximately one billion solar masses, 40 times greater than previous estimates.

  • With this updated mass, astronomers have determined that LID-568 is behaving normally, rather than feeding at 40 times the theoretical limit as previously thought.

  • These findings imply that the rapid growth of supermassive black holes in the early universe cannot solely be attributed to accretion rates exceeding theoretical limits.

  • However, dust absorption and scattering significantly dimmed the light from LID-568, leading to miscalculations of its mass and feeding rate.

  • New research published on April 4, 2025, in The Astrophysical Journal indicates that earlier estimations were incorrect due to heavy dust obscuring the black hole's emissions.

  • The black hole's luminosity now aligns with the Eddington limit, confirming it is not in a super-Eddington accretion phase as earlier suggested.

  • This study highlights the importance of correcting for dust extinction in black hole mass measurements, a practice that has not been thoroughly applied to active galactic nuclei (AGN) previously.

  • The revised understanding of LID-568's feeding habits may influence interpretations of other black holes and their properties, particularly in dust-obscured environments.

Summary based on 1 source


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