Articles tagged with Cosmic Microwave Background
The Atacama Cosmology Telescope's sixth and final data release confirms the 'Hubble tension' and rules out extended cosmological models, providing new insights into the Universe's evolution and current state. ACT's observations offer a cleaner starting point for future research.
Researchers use high-resolution computer simulations and terabytes of data to detect faint signals from the Epoch of Reionization, providing insights into galaxy formation. The study sets an upper limit on when the EoR likely ended, offering a new parameter for scientists to work with as they continue to investigate the early universe.
Researchers propose using lensed gravitational waves from binary black holes to measure cosmic expansion. The method uses the delays between repeat appearances of these signals to encode the universe's expansion rate. This approach does not rely on knowing the exact locations or distances of binary black holes, making it a promising to...
Researchers at the University of Toronto have made a breakthrough in understanding dark matter and its impact on the universe's large-scale structure. By analyzing cosmic microwave background data and galaxy clustering patterns, they suggest that ultra-light axion particles could account for the observed lack of clumpiness.
Researchers from the Atacama Cosmology Telescope collaboration have created a groundbreaking new image that reveals the most detailed map of dark matter distributed across a quarter of the entire sky. The study confirms Einstein's theory of how massive structures grow and bend light, supporting the standard model of cosmology.
The Princeton-led team measured the dark matter's 'clumpiness,' finding a value of 0.776 that conflicts with the Cosmic Microwave Background's value of 0.83. The discrepancy suggests the standard model might be incomplete or has an error, prompting further investigation.
A new study by EPFL researchers has calibrated the best cosmic yardsticks to unprecedented accuracy, further amplifying the Hubble tension. The Hubble constant is measured in kilometers per second per megaparsec and has puzzled astrophysicists and cosmologists worldwide.
The QUIJOTE experiment has provided detailed maps of the galaxy's microwave emission processes, characterizing synchrotron emission with unprecedented accuracy. The new data also enable the study of anomalous microwave emission and offer insights into dark matter decay processes.
Researchers develop new method to evaluate telescope performance before installation, enabling better optimization and reduced scattering. This approach uses near-field radio holography to map the optics at cryogenic temperatures, improving signal-to-noise ratio and ensuring accurate space observations.
Astrophysicists have identified a potential test to rule out cosmic inflation, a theory explaining the universe's origins. The cosmic graviton background (CGB) could provide evidence against inflation if detected, and its impact on the early Universe's expansion rate could be measured by next-generation probes.
Researchers used microwaves from the cosmic microwave background to measure dark matter distribution around distant galaxies. The findings suggest a different clumpiness measurement than predicted by the Lambda-CDM model, hinting at a possible flaw in the current cosmology theories.
Physicists have developed a method to predict the composition of dark matter by analyzing cosmological signatures. The research uses big bang nucleosynthesis and cosmic microwave background radiation to identify specific categories of dark matter with masses between those of the electron and proton.
A new study by the POLARBEAR collaboration provides a new correction algorithm that allows for almost double the amount of reliable data on Cosmological Gravitational Waves (CGWs), produced during Inflation in the early Universe. This enhances our understanding of the signal and brings us closer to observing CGWs.
A team of astrophysicists has discovered a new method to measure the cosmic microwave background radiation's temperature at an early epoch of the universe. By observing HFLS3, a massive starburst galaxy, they found a cold water cloud that casts a shadow on the microwave radiation, revealing the Big Bang's relic temperature.
The BICEP3 experiment has ruled out several popular inflation models, including some motivated by string theory. The findings suggest that the correct model will be slightly more complicated than those ruled out, but still offer a wide range of viable alternatives.
A new method to measure polarization angle developed, achieving precision twice that of previous work. A hint of parity symmetry violation found in the cosmic microwave background radiation with 99.2% confidence level.
A new measurement of the Hubble constant has been made using light from extremely distant galaxies, estimating a value of 76.8 kilometers per second per megaparsec. The result is comparable to previous estimates but differs significantly from other methods, sparking debate about potential new physics beyond our current understanding.
A new survey of galaxy redshifts finds no evidence of a supervoid causing the Cosmic Microwave Background's Cold Spot. The researchers suggest that smaller voids and galaxy clusters in the area may be responsible, but simulations of standard cosmology give only a 1-in-50 chance that the spot arose by chance.
Researchers have created a 3D printed map of the cosmic microwave background, providing a new way to visualize the oldest light in the universe. This innovation uses 3D printing technology to represent temperature differences as bumps and dips on a spherical surface, allowing anyone to appreciate the structure of the early universe.
Researchers propose a novel approach to determine the origin of the universe by analyzing variations in the cosmic microwave background. The new method identifies
The POLARBEAR collaboration has made the most sensitive measurements yet of the cosmic microwave background's polarization, revealing telling twists called B-modes that indicate cosmic history imprints. These findings suggest a new regime in precision cosmology, paving the way for solving mysteries about matter and energy at the Big Bang.
The study provides the first direct evidence that million-degree gas clouds are tightly gathered in the cluster's outskirts. The Suzaku images reveal that the outer parts of the Perseus cluster contain too many baryons, contradicting earlier studies and galaxy surveys.
Researchers have developed MADmap, a new software tool that improves the mapping of the cosmic microwave background by accounting for noise in the data. The software uses a special code to weight and account for colored noise, which is a known characteristic of bolometers used to measure radiation at certain wavelengths.
Researchers have found an unusual cold spot in the cosmic microwave background that could be caused by a cosmic defect created just after the Big Bang. The discovery provides a potential window into understanding the fundamental nature of elementary particles and forces.
Researchers at University of Cambridge and Institute of Physics of Cantabria propose existence of cosmic defects called textures, predicted by particle physics theories. Textures are defects in vacuum left over from hot early universe, observed as hot and cold spots in cosmic microwave background radiation.
The COBE experiments confirmed the universe was born in a big bang, shedding light on its structure. Variations in the CMB revealed tiny but regular temperature fluctuations that exist everywhere in the cosmos.
The team developed statistical techniques to analyze WMAP data, helping confirm the Big Bang theory and offering insights into the universe's shape, composition, and fate. Their approach allows for separation of data information from model assumptions, providing a more accurate understanding of the cosmos.
The robotic telescope successfully mapped the southern sky in hydrogen-alpha light for a two-year project to identify low-surface-brightness phenomena within our own galaxy. The data will help decontaminate measurements of the cosmic microwave background from galactic emissions.
Marc Kamionkowski has been awarded the Helen B. Warner Prize for his significant contributions to cosmology, astrophysics, and particle physics. His research focuses on the cosmic microwave background radiation and its potential to clarify the origins of the universe.