The evolutionary paths of supermassive black holes and their host galaxies
A new paper entitled “Evolutionary Paths of Active Galactic Nuclei and Their Host Galaxies,” published on August 17, 2023, in Nature Astronomy, provides critical new insights on the co-evolution of supermassive black holes and their host galaxies. The tight correlations observed between the masses of supermassive black holes and the properties of their host galaxies have long intrigued astronomers. No consensus has been reached, however, on how the black hole-galaxy relations arose or how they evolved over time. The specific link between the black hole mass and the properties of host galaxies of AGNs in the nearby universe has remained elusive. The study found that galaxies with actively accreting black holes follow a similar relationship between black hole mass and stellar mass, regardless of galaxy type. Moreover, the position of a galaxy on this relation appears linked to the level of star formation and black hole accretion activity. "Our results unveil evolutionary trajectories for galaxies on the black hole mass-stellar mass plane," said Dr. Zhuang. “The joint evolution of the galaxy and its central black hole appears synchronized over long timescales. Galaxies that have overweight black holes catch up by making more stars. Those that have skinny black holes allow the black hole to eat more. In the end, the two reach a happy balance.” The availability of a common gas supply for black hole accretion and star formation may account for the lockstep, synchronized growth of objects on the local relation. The evolutionary path of objects with undermassive black holes situated below the local relation supports a scenario suggested by recent simulations in which black hole growth initially lags behind star formation but later the situation reverses after the gas becomes stabilized at higher stellar mass. AGNs with overmassive black holes above the local relation continue to gain stellar mass, consistent with the detection of active star formation and abundant gas content in early-type AGN host galaxies. These trajectories suggest that radiative-mode AGN feedback mechanisms, which are expected to suppress star formation, are less effective for galaxies below the scaling relation. For galaxies above the relation, kinetic-mode feedback appears insufficient to halt long-term star formation. "This work provides new insights on the coevolution of supermassive black holes and their host galaxies that can serve as the definitive benchmark and framework for evolutionary studies," highlighted Prof. Ho. "The results offer critical observational constraints for numerical simulations modeling the complex interplay between black holes and their host galaxies." “This article explores the evolutionary paths of galaxies on the black hole mass–stellar mass plane in the nearby Universe, linking the properties of star formation and black hole accretion and providing critical constraints for active galactic nuclei feedback,” the editor of Nature Astronomy highly commends. “The findings in this paper are extremely interesting and are quite important for our understanding of black hole and galaxy co-evolution across cosmic times and their star formation and accretion,” says one of the reviewers.
The James Webb Space Telescope, humanity's next-generation space observatory, has once again astounded scientists and astronomers with a groundbreaking discovery. In its Cosmic Evolution Early Release Science (CEERS) Survey, the Webb telescope team has successfully identified the most distant active supermassive black hole ever recorded. Situated within the galaxy CEERS 1019, this remarkable black hole emerged just over 570 million years after the cataclysmic event known as the Big Bang. Astonishingly, it possesses a mass equivalent to a mere 9 million times that of our Sun. Read full article here
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James Webb Space Telescope Reveals Mysterious "Mini-Neptune" Planet with Steamy Atmosphere. Read full article here
NASA’s James Webb Space Telescope has made a significant discovery, providing insight into the atmosphere of a “mini-Neptune,” a type of planet that is common in the galaxy but is not well-understood. The telescope observed GJ 1214 b, a distant planet outside our solar system, and found that it is likely a highly reflective world with a steamy atmosphere. This is the closest look yet at this type of planet, which was largely impenetrable to previous observations. Read full article here
NASA’s James Webb Space Telescope has unveiled groundbreaking details about the Crab Nebula! This iconic supernova remnant, observed in unprecedented detail, challenges previous theories about its origins. JWST’s advanced instruments revealed intricate structures and compositions, offering fresh insights into the enigmatic nebula. Dive into the mysteries of space with this latest discovery!
🔭🚀 Read more: https://www.jameswebbdiscovery.com/discoveries/james-webb-space-telescope-uncovers-new-mysteries-of-the-crab-nebula
#NASA #JamesWebb #CrabNebula #SpaceDiscovery #Astronomy #Supernova #SpaceExploration #Astrophysics #ScienceNews
The James Webb Space Telescope has once again left us in awe with its groundbreaking discoveries! 🚀🔭
In the Orion Nebula, located 1,300 light-years from Earth, astronomers have unveiled a cosmic enigma – Jupiter Mass Binary Objects (JuMBOs)! 🪐🪐 These pairs of planet-like entities challenge the very foundations of our understanding of the universe.
🌠 How did they form? Why are they there? These are questions that have left scientists scratching their heads. This discovery hints at something fundamentally new about star and planet formation.
As Webb continues to probe deeper into the mysteries of the cosmos, we are reminded of the boundless wonders our universe holds. 🌠🤯
Read the full article here and embark on a cosmic journey of discovery.
Stellar Nursery of The Pillars of Creation revealed by James Webb Telescope. Read full article here
#Stargazing #AndromedaGalaxy #CosmicAdventure #NakedEyeAstronomy #StellariumMagic
This week Webb is observing objects including asteroids, comets, stars, and galaxies. Read full release here
M-106 galaxy as seen by Hubble telescope is being observed by JWST this week.
M-106 Galaxy - Credit - NASA, ESA, the Hubble Heritage Team (STScI/AURA), and R. Gendler (for the Hubble Heritage Team); Acknowledgment: J. GaBany
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