🌌 Cosmic Megastructures: Latest Discoveries Digest
🌀 Ultra-Massive Spiral Galaxy Found in Early Universe
Mengyuan Xiao, Christina C. Williams, Pascal A. Oesch
JWST has revealed "Zhúlóng" (Torch Dragon), an extraordinarily massive spiral galaxy existing just 1 billion years after the Big Bang. This discovery, showing a mature galaxy with spiral arms spanning 19 kpc, challenges our understanding of how quickly large cosmic structures could form in the early universe. (read...)
🕸️ Extensive Cosmic Web Filaments Detected Near M81 Group
Kenneth M. Lanzetta, Stefan Gromoll, Michael M. Shara
Researchers have discovered a remarkable network of ionized gaseous filaments stretching across 30 degrees of sky, providing the first direct observation of cosmic web structures in our galactic neighborhood. This finding offers unprecedented evidence of the theorized cosmic web that connects galaxies and galaxy groups. (read...)
🌟 Massive Double Protocluster Confirmed at High Redshift
Michael J. Nicandro Rosenthal, Amy J. Barger, Lennox L. Cowie
A spectroscopic survey has confirmed two massive overdensities at z≈3.1, containing dozens of spectroscopically confirmed members. These structures are predicted to evolve into a single massive cluster with a total mass of 1.0-1.5×10¹⁵ solar masses by z~0.1-0.4. (read...)
🔭 Large-Scale Structure Mapping Reveals Protocluster Network
Vandana Ramakrishnan, Kyoung-Soo Lee, Maria Celeste Artale
The ODIN survey has successfully mapped protoclusters and cosmic filaments at z=3.1 using Lyman-alpha emitting galaxies. The observations match remarkably well with IllustrisTNG simulations, confirming theoretical predictions about early universe structure formation. (read...)
⭐ Supercluster Evolution in the Local Universe
B. A. Seidel, K. Dolag, R.-S. Remus
Analysis of superclusters in the SLOW simulations reveals that not all nearby massive structures will eventually merge, providing new insights into the largest bound structures in the universe. This study helps understand which superclusters will remain distinct in the future evolution of cosmic structures.
arXiv.org
PANORAMIC: Discovery of an Ultra-Massive Grand-Design Spiral...
We report the discovery of an ultra-massive grand-design red spiral galaxy, named Zhúlóng (Torch Dragon), at $z_{\rm phot} = 5.2^{+0.3}_{-0.2}$ in the JWST PANORAMIC survey, identified as the...
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