All articles tagged with #galaxy clusters
Originally Published 3 days ago — by Space
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.
Originally Published 3 days ago — by Big Think
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.
Originally Published 6 days ago — by Live Science
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.
Originally Published 6 days ago — by Yahoo
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.
Originally Published 7 days ago — by Nature
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.
Originally Published 2 months ago — by Phys.org
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.
Originally Published 2 months ago — by Space
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.
Originally Published 2 months ago — by Phys.org
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.
Originally Published 2 months ago — by Space
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.
Originally Published 3 months ago — by Space
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.
Originally Published 4 months ago — by Earth.com
Astronomers have identified a massive, ring-like structure called the Big Ring, spanning about 1.3 billion light-years, which challenges current cosmological models that predict the universe's large-scale matter distribution should be more uniform. This discovery, along with findings about the Milky Way's larger gravitational basin, suggests the universe may contain more extensive and complex structures than previously thought, prompting a reevaluation of existing theories.
Originally Published 5 months ago — by Phys.org
Researchers from the University of Copenhagen used galaxy clusters and the magnetic fields around them to search for axions, a hypothetical particle linked to dark matter. By combining data from 32 distant black holes, they identified a pattern that hints at the presence of axions, bringing us closer to understanding dark matter. This innovative method could be applied to other radiation types and help narrow down the search for these elusive particles.
Originally Published 6 months ago — by Live Science
Astronomers have detected the most distant mini-halo, a cloud of energetic particles around a galaxy cluster from 10 billion years ago, which could shed light on the early universe and galaxy formation processes. The discovery suggests such particles have existed since galaxy cluster formation and may be caused by black holes or particle collisions, impacting star formation and cosmic magnetic fields. Future telescopes like the SKA will help further explore these phenomena.
Originally Published 6 months ago — by Earth.com
Astronomers have discovered Quipu, a cosmic filament over 1.3 billion light-years long and weighing around 200 quadrillion times the Sun's mass, making it the largest known structure in the universe. This massive filament influences galaxy motions, cosmic microwave background measurements, and provides insights into cosmic web formation, validating predictions from cosmological models.
Originally Published 6 months ago — by Phys.org
Astronomers have discovered the most distant mini-halo surrounding a galaxy cluster from 10 billion years ago, revealing that energetic processes involving black holes and cosmic collisions have shaped galaxy clusters throughout most of the universe's history, providing new insights into the early universe's formation.