Astronomers Discover Unusual Black Hole Jets in Spiral Galaxy, Challenging Galactic Evolution Theories

March 24, 2025
Astronomers Discover Unusual Black Hole Jets in Spiral Galaxy, Challenging Galactic Evolution Theories
  • The findings, published in the Monthly Notices of the Royal Astronomical Society, were derived from data collected using the Hubble Space Telescope, the Giant Metrewave Radio Telescope, and the Atacama Large Millimeter Wave Array.

  • Astronomers have recently identified a supermassive black hole in the galaxy 2MASX J23453268-0449256, which is emitting powerful jets of energy, raising concerns about the future of the Milky Way's own black hole, Sagittarius A* (Sgr A*).

  • Overall, the study of J2345-0449256 and similar rare galaxies can illuminate the relationship between the growth of supermassive black holes and their host galaxies, suggesting they may evolve independently.

  • The study revealed that the black hole's jets are heating the surrounding gas halo, preventing it from cooling and forming new stars, which is contrary to typical galactic behavior.

  • Despite hosting one of the most extreme black holes, the galaxy maintains a stable spiral structure with defined arms and an undisturbed stellar ring.

  • Interestingly, the galaxy features a 'pseudo-bulge' rather than a classical bulge, indicating a unique evolutionary path that remains calm despite the active black hole.

  • Lead author Professor Joydeep Bagchi emphasized the need to rethink our understanding of galaxy evolution and the implications for the future of galaxies like the Milky Way.

  • This research suggests that the Milky Way may have experienced similar powerful jets in the past, as indicated by large gamma-ray bubbles observed above and below the galactic plane.

  • This discovery challenges existing theories regarding jet formation, as such jets are typically found in elliptical galaxies rather than spiral galaxies like J2345-0449256.

  • In contrast, Sgr A*, which has a mass of about 4.3 million solar masses, currently does not produce powerful jets due to a lack of feeding material, but a tidal disruption event could change this.

  • Understanding galaxies like J2345-0449256 could provide significant insights into dark matter, galaxy evolution, and the origins of life, according to researchers.

  • The galaxy contains ten times more dark matter than the Milky Way, which may help stabilize its structure and maintain organization despite the energetic activity of its black hole.

Summary based on 6 sources


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