All articles tagged with #galaxy clusters
Astronomers released LoTSS-DR3, the most detailed low-frequency radio sky map from the LOFAR network, cataloging 13.7 million cosmic sources and offering new insights into supermassive black holes, their jets, and galaxy clusters, while tackling ionospheric distortions with advanced data-processing techniques on ~18.6 petabytes of data.
NASA/JAXA’s XRISM X‑ray mission uses high‑resolution spectroscopy to measure gas motions around supermassive black holes, notably M87* and the Perseus cluster, unveiling the strongest turbulence seen near a black hole and the kinetic energy of surrounding gas. This helps explain how black holes heat their environments and influence galactic evolution; findings published late Jan 2026 in Nature and built on XRISM’s 2023 launch in collaboration with ESA.
A Bonn-led study analyzing 46 nearby galaxy clusters finds their mass is about twice as heavy in baryonic matter as previously thought, due to components like stellar remnants and intracluster light. The revised accounting brings cluster masses closer to MOND predictions and challenges the need for exotic dark matter, with authors suggesting a reevaluation of dark-matter-focused research funding.
Using the James Webb Space Telescope and NASA’s Chandra X-ray Observatory, scientists observed the most distant protocluster yet seen, JADES-ID1, forming when the universe was about 1 billion years old. Light from this building cluster has travelled 12.7 billion years to reach Earth, revealing multiple galaxies bound by gravity within a surrounding cloud of hot gas and X‑ray emission. The finding—published in Nature—suggests galaxy clusters grew far more quickly in the early universe than current models had predicted, raising new questions about how these massive structures assembled.
Using data from NASA’s James Webb Space Telescope, scientists produced the most detailed high-resolution map yet of distant galaxies, revealing the dark matter skeleton that links galaxy clusters and has grown over roughly 10 billion years, with nearly 800,000 galaxies identified.
Scientists are exploring the nature of dark matter, which makes up about 85% of the universe's matter, by studying galaxy clusters with NASA's XRISM telescope. They are particularly interested in detecting signals from hypothetical particles called sterile neutrinos, which could decay and produce observable X-ray emissions, potentially revealing the particles that constitute dark matter.
The article explains what it means for objects to be gravitationally bound in an expanding universe, discussing how structures like stars, galaxies, and clusters are held together by gravity despite the universe's overall expansion, and explores how dark energy influences the future of these structures.
Astronomers using ALMA have discovered a galaxy cluster from just 1.4 billion years after the Big Bang that is unexpectedly hot, challenging current models of galaxy formation and suggesting that such structures may form more rapidly than previously thought.
Scientists discovered an extremely hot and old galaxy cluster from just 1.4 billion years after the Big Bang, which challenges current cosmological theories. The cluster's unexpected heat is likely due to energy from supermassive black holes at its core, suggesting galaxy clusters evolve more explosively than previously thought, potentially reshaping our understanding of the early universe.
This study reports the detection of hot intracluster gas at redshift 4.3 using the Sunyaev–Zeldovich effect, providing insights into the formation and evolution of galaxy clusters in the early universe.
An international team has demonstrated that pixelized strong-lensing modeling on galaxy clusters significantly improves the precision of measuring the Hubble constant, potentially resolving the existing tension in its current measurements and advancing high-precision cosmology.
Astronomers have created the largest galaxy cluster catalog to date, providing new insights into the universe's structure and testing the Lambda-CDM model, with findings supporting its accuracy and offering a clearer map of the cosmic landscape.
A new study using data from the Dark Energy Survey confirms that the Lambda-CDM model accurately describes the universe, by analyzing massive galaxy clusters to understand cosmic laws and the distribution of dark matter and energy, supporting previous findings and setting the stage for future telescope observations.
A new study suggests dark matter might subtly tint passing light with red or blue hues due to indirect interactions, potentially detectable with next-generation ultra-sensitive telescopes, offering a novel way to study this elusive component of the universe.
Citizen scientists discovered the most powerful twin odd radio circles (ORCs) in space, revealing new insights into these large, mysterious structures that are linked to galaxy activity and black hole phenomena, with implications for understanding galaxy evolution and the role of plasma interactions in space.