NASA's James Webb Space Telescope and Hubble have detected a tiny black hole, oMEGACat BH-2, in the ancient star cluster Omega Centauri. This discovery is significant because it showcases the precision of modern astronomy and the ability to find black holes that are not supermassive. The black hole is just 4.5 times the mass of the sun and is not in the middle of a feast or glowing, but rather was inferred by tracking the orbit of a star around it.
This is the first time a black hole of such a small scale has been found using astrometry, a technique that involves measuring the positions of stars to infer the presence of an invisible object. The discovery of oMEGACat BH-2 raises questions about the prevalence of tiny black holes in globular clusters and their impact on the dynamics of these clusters.
One surprising finding is that oMEGACat BH-2 is not as heavy as predicted by computer models based on the age of the stars in Omega Centauri. Early stars, formed before the prevalence of much heavier elements in the universe, are thought to produce heavier stellar black holes. However, this discovery suggests that lighter elements can also form black holes, challenging our understanding of black hole formation.
The discovery of oMEGACat BH-2 highlights the power of modern astronomy and the ability to find and study black holes that are not supermassive. It also raises questions about the dynamics of globular clusters and the formation of stellar black holes, providing new insights into the complex interplay between stars and black holes in the universe.
