Discovery Sheds Light on Formation of Ancient Elliptical Galaxies
An international team of researchers, including scientists from The University of Tokyo’s Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), has uncovered evidence that old elliptical galaxies may have originated from intense star formation in the early cores of galaxies. This groundbreaking finding, published in Nature, provides new insights into the evolution of galaxies from the early universe.
Modern galaxies are diverse in shape and behavior. Younger, disk-shaped spiral galaxies like the Milky Way actively form new stars, while older elliptical galaxies are dominated by central bulges, lack significant gas, and no longer generate new stars. These ancient spheroidal galaxies, populated by very old stars, have long been a mystery—until now.
The research team analyzed data from the Atacama Large Millimeter/submillimeter Array (ALMA), focusing on over 100 Submillimeter Bright Galaxies (SMGs) with redshifts corresponding to the "Cosmic Noon" era. This period, between 1.6 and 5.9 billion years after the Big Bang, marked a peak in galaxy star formation. The study provides the first observational evidence that spheroidal galaxies could form directly through intense starburst activity in the luminous cores of early galaxies.
Led by Qinghua Tan from the Chinese Academy of Sciences Purple Mountain Observatory and including contributions from Kavli IPMU researchers John Silverman, Boris Kalita, and Zhaoxuan Liu, the team employed statistical and 3D analyses of submillimeter dust emissions. They discovered that the emissions were highly compact and deviated from typical exponential disk profiles. This suggests that the star-forming regions in these galaxies were already spheroid-like.
Further analysis of the galaxies’ 3D geometry revealed that their shapes were predominantly spherical, with shorter axes averaging half the length of their longest axes. Supported by numerical simulations, the researchers determined that cold gas accretion and galaxy interactions were key mechanisms driving the formation of these spheroidal galaxies in the early universe.
http://www.akvarijum.org/forum/galaxy-clusters-unveiling-the-role-of-supermassive-black-ho-t28224.html
http://www.akvarijum.org/forum/white-dwarfs-reveal-new-insights-into-extreme-gravity-and-da-t28225.html
https://melds.eu/blogs/11449/Massive-Dormant-Black-Hole-Discovered-in-the-Early-Universe
https://melds.eu/blogs/11450/Unveiling-the-Moon-s-True-Age-A-Volcanic-Facelift
https://www.retroskoter.com/viewtopic.php?t=17493
https://www.retroskoter.com/viewtopic.php?t=17494
https://www.consolefun.fr/forum/viewtopic.php?t=44718
https://www.consolefun.fr/forum/viewtopic.php?t=44719
https://www.suzukiclubnederland.nl/forum/showthread.php?tid=30894
https://www.suzukiclubnederland.nl/forum/showthread.php?tid=30895
https://forum.heroes-centrum.com/viewtopic.php?f=1&t=49317
https://forum.heroes-centrum.com/viewtopic.php?f=1&t=49318
https://www.mzriders.com/viewtopic.php?f=19&t=14423
https://www.mzriders.com/viewtopic.php?f=19&t=14424
https://cupef.org/blogs/488/World-s-Smallest-Walking-Robot-Created-for-Microscale-Imaging
https://cupef.org/blogs/489/Nobel-Prizes-Highlight-the-Convergence-of-Physics-Chemistry-and-AI
https://www.thekgh.org/forum/breakthrough-in-low-power-ai-sensors-for-time-series-data-processing
https://www.thekgh.org/forum/improving-trust-in-human-robot-teams-through-synchronised-movement
https://forum.czech.farm/d/328-ai-gains-the-ability-to-feel-surfaces-using-quantum-technology
https://forum.czech.farm/d/329-ai-enhances-mouse-behaviour-analysis-reducing-animal-use-in-research
https://www.naacp-lowerrichland.org/forum/robot-identifies-plant-species-through-touch-advancing-agricultural-research
https://www.naacp-lowerrichland.org/forum/panoradar-enhancing-robot-perception-in-harsh-conditions-using-radio-waves
https://www.gooalsocial.com/blogs/view/7704/ai-powered-robots-revolutionize-chemical-synthesis-research
https://www.gooalsocial.com/blogs/view/7705/autonomous-drones-to-enhance-sperm-whale-communication-study
https://blog.spacehey.com/entry?id=1341031
https://blog.spacehey.com/entry?id=1341035
https://sabaylok.com/blogs/18941/Unraveling-the-Mystery-of-Mars-Dust-Storms
https://sabaylok.com/blogs/18942/Resolving-the-Mystery-of-Star-Movements-in-Omega-Centauri
https://musescore.org/es/node/373216
https://musescore.org/es/node/373217
https://management.org/forum/threads/revolutionizing-surveillance-and-ai-with-action-detecting-video-systems.57/
https://management.org/forum/threads/inspired-by-feline-vision-a-new-leap-in-robotic-eyesight.58/
https://forum.shmupemall.com/viewtopic.php?f=9&t=3127
https://forum.shmupemall.com/viewtopic.php?f=9&t=3128
https://ps2onlinegaming.com/viewtopic.php?f=10&t=2827
https://ps2onlinegaming.com/viewtopic.php?f=10&t=2828
http://www.akvarijum.org/forum/breakthrough-in-soft-robotics-toroidal-micro-robot-navigate-t28226.html
https://melds.eu/blogs/11468/Exploring-the-Universe-s-Secrets-Through-Neutrinos
This finding challenges traditional models of galaxy evolution and suggests that such processes were common during the formation of early spheroids.
The research utilized data from the A3COSMOS and A3GOODSS archival projects, enabling detailed analysis of galaxies with high signal-to-noise ratios. Future studies using more advanced observations from ALMA, along with next-generation instruments like the Euclid spacecraft, the James Webb Space Telescope (JWST), and the China Space Station Telescope (CSST), will provide deeper insights into the distribution and dynamics of cold gas and star formation in galaxies.
By combining these advanced tools, researchers aim to construct a more comprehensive understanding of how galaxies, and ultimately the universe, have evolved over time.