Articles tagged with Dark Energy
Astronomers propose a new method to measure the universe's expansion rate by analyzing the changes in signal properties of black hole collisions. By using the entire population of black holes as a calibration tool, scientists can directly identify and correct for errors, providing a more accurate measurement.
Researchers used simulations to compare Einstein's theory and modified gravity, finding that 'dark gravity' may be equally good at explaining data from binary neutron star collisions. This could lead to the discovery of new phenomena detectable by next-generation gravitational interferometers.
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.
Swati Singh, a UD assistant professor of electrical and computer engineering, has received a $400,000 NSF CAREER award to explore new methods for studying the dark sector. She aims to develop precision measurement systems to detect astrophysical signals using mechanical devices operating in classical and quantum realms.
Researchers examine the accelerating expansion of the Universe, a phenomenon driven by dark energy. The study reveals disparities between observations and theoretical models, highlighting the need for new understanding and precision experiments.
Researchers at the University of Cambridge suggest that unexplained results from the XENON1T experiment could be attributed to dark energy, rather than dark matter. The study proposes a physical model to explain the findings, which may have originated from dark energy particles produced in the Sun's strong magnetic fields.
Researchers used a neutron beam to perform pendellösung interferometry on silicon, achieving the highest precision measurements to date. The technique provided insights into the crystal's mechanical and thermal properties, as well as the neutron's charge radius and short-range forces.
The Dark Energy Survey has released its most precise look at the universe's evolution, using data from 226 million galaxies observed over nearly one-eighth of the sky. The results confirm the current best model of the Universe, but hint that the Universe today is a few percent less clumpy than predicted.
Roman will study thousands of type Ia supernovae across vast distances to pin down dark energy and understand the universe's expansion history. The mission aims to clarify discrepancies in measurements of the Hubble constant, which describes the current expansion rate.
The DESI instrument will capture light from tens of millions of galaxies and other distant objects to construct a detailed three-dimensional map of the universe. The data will help scientists better understand dark energy's repulsive force and its impact on the expansion of the universe.
Cosmologists have found a way to double the accuracy of measuring distances to supernova explosions, enabling precise study of dark energy. The Nearby Supernova Factory collaboration has developed a new method that quadruples the number of supernovae used, allowing for more accurate measurements and reducing biases.
Researchers have made a significant step in understanding dark energy using the eBOSS survey, detecting its existence at a 11-sigma significance. The study employed multi-tracer analysis to mitigate systematics and achieve robust cosmological results.
Researchers at the Dark Energy Survey combined data on matter distribution, galaxies, and galaxy clusters to refine estimates of dark matter and dark energy. This analysis provides more precise estimates of the average density of matter and its clumpiness, which are crucial parameters for understanding these mysterious substances.
Researchers propose a new type of dark energy that could explain conflicting measurements of the universe's expansion rate. The theory suggests that dark energy underwent a phase transition triggered by the universe's expansion, resulting in a more consistent explanation for observed phenomena.
A giant 2D map of the universe, released by the Beijing-Arizona Sky Survey (BASS), will aid the upcoming DESI project's spectroscopic survey. The map covers half of the sky, spanning over 10 trillion pixels and containing about two billion objects.
The Dark Energy Survey has released a massive catalog of nearly 700 million astronomical objects, building on the previous data release and improving calibration techniques. The catalog provides unprecedented insights into the distribution of matter in the Universe and may hold clues to how our galaxy was assembled over billions of years.
Astronomers have released the largest-ever map of the sky, comprising over a billion galaxies, to aid in understanding dark energy. The DESI Legacy Imaging Surveys will provide new insights into this mysterious force driving the Universe's accelerating expansion.
A new project led by West Virginia University researcher Kevin Bandura aims to understand the nature of dark energy by mapping out the distribution of matter throughout the universe. The three-year project will use precise observations to study the expansion of the universe, which is currently accelerating due to dark energy.
Astronomers have spotted a spectacular UV flash accompanying a type Ia supernova, providing clues to understanding how white dwarfs explode and creating iron. The event may also shed light on dark energy and the universe's formation.
A new study has provided precise tests of dark energy and cosmic expansion by analyzing the distribution of galaxies in the Universe. The research uses a combination of cosmic voids and baryon acoustic oscillations, yielding more accurate results than previous methods.
Using DES data, researchers found more than 300 trans-Neptunian objects, including 245 discoveries made by DES. The method developed by Pedro Bernardinelli can also be used to search for TNOs in upcoming astronomy surveys.
The IKBFU scientists proposed a new theory suggesting that the 'Dark Energy' is not a mysterious entity but rather a manifestation of the universe's boundaries. They draw an analogy with the Earth, where we experience attraction due to gravity but also have no physical boundaries.
The Dark Energy Spectroscopic Instrument (DESI) has begun testing its capabilities, capturing light from distant galaxies and preparing to map 35 million galaxies across 1/3 of the sky. DESI aims to study 10 million stars in our galaxy, the Milky Way, tackling one of physics' most profound problems: the nature of dark energy.
Researchers used machine learning algorithms to analyze dark matter maps, achieving 30% more accurate results than traditional methods. The AI was trained on simulated data and applied to actual KiDS-450 dataset, showing promising potential for future cosmological applications.
A team of researchers used innovative approaches to calculate the mass of neutrinos, setting an upper limit for the lightest species for the first time. They combined data from various sources, including galaxy observations and particle accelerator experiments, to arrive at a maximum possible mass of 0.086 eV.
Researchers at Imperial College London and the University of Nottingham have tested the possibility of a fifth force acting on single atoms, finding no evidence for its existence. This rules out popular theories of dark energy that modify the theory of gravity, leaving fewer places to search for the elusive force.
A new study has developed a method to measure the cosmic expansion with greater precision, utilizing galaxy voids and accounting for distortions caused by dark energy and curvature. The results agree with the simplest model of a flat universe and tighten constraints on alternative theories.
A team led by UC Riverside physicists has identified dark trions as a promising carrier of quantum information, with a lifetime of over 100 times longer than bright trions. This breakthrough could revolutionize information transmission and enable new ways of data transfer.
Astronomers using NASA's Hubble Space Telescope have strengthened the case for new theories to explain the forces shaping the cosmos. The latest Hubble measurements suggest a faster expansion rate in the modern universe, contradicting expectations based on early universe observations.
A research team from the University of Kansas has earned a $900,000 grant to investigate dark matter and dark energy. The team plans to use supercolliders, neutrino detectors, and computer simulations to search for indications of these mysterious entities.
The Dark Energy Survey's legacy continues as scientists prepare to analyze the final image taken on January 9, 2019. The survey mapped 5,000 square degrees of the southern sky, collecting 50 terabytes worth of data and mapping nearly a billion galaxies.
Researchers propose a new structural concept for the Universe, including dark energy, which rides on an expanding bubble in an additional dimension. This model may solve the enigma of dark energy and provide insight into the creation and future fate of the Universe.
Recent developments in string theory suggest a paradigm shift could be imminent, with some theories being incompatible with dark energy. Timm Wrase's calculations reveal that certain fields may not exist in string theory, contradicting the Higgs field's properties.
A study from the University of Bonn confirms that galaxy clusters formed too slowly than expected, potentially requiring a rework of current theories. The researchers will analyze their data in greater detail to confirm whether the standard model needs to be revised.
The study uses tiny gravitational distortions to measure the lumpiness of dark matter in the universe. The researchers find that the new observations are consistent with the simplest model for dark energy, but more data are needed to confirm the results.
Scientists are using large-scale computer simulations and statistical methods to better understand dark matter and dark energy. These mysterious components make up approximately 96% of the universe, influencing its expansion and structure. The research aims to provide insights into over 14 billion years of cosmic history.
A new theory suggests that a dynamical system singularity may not be a physical reality, allowing the universe to evolve infinitely. The study, published in Physical Review D, proposes an alternate gravity model that includes quadratic scalar invariants and corresponds with Alexei Starobinsky's inflational theory.
Researchers at TU Wien use the PF2 ultra-cold neutron source to test the existence of symmetrons, a theory that could explain dark matter. The experiment excludes a broad range of parameter values, but the team is cautious and seeks further measurements or discoveries.
The cosmological constant was first introduced by Einstein in 1917 to make the static universe model work. However, after the discovery of cosmic expansion, it became marginalized until recent observations and experiments revived its relevance as a key component of dark energy theory.
New research suggests that life could be common throughout the multiverse due to dark energy's impact on star and planet formation. The findings contradict the long-held notion that a specific amount of dark energy is necessary for life to emerge, raising questions about the multiverse theory's ability to explain cosmic origins.
Scientists warn that human brains may be overlooking signs of extraterrestrial life due to cognitive biases. Researchers conducted an experiment where participants failed to detect artificial structures in images, mirroring the famous gorilla suit test.
The Mayall telescope is undergoing a major overhaul to install the Dark Energy Spectroscopic Instrument (DESI), which will measure the spectra of 5000 astronomical objects simultaneously. The instrument will allow DESI to map out about one-third of the sky and survey 30 million galaxies and quasars over a five-year period.
The Dark Energy Survey has publicly released its first three years of data, containing information on 400 million astronomical objects, including distant galaxies and stars in the Milky Way. The dataset also reveals 11 new stellar streams, remnants of smaller galaxies torn apart by the Milky Way.
Emission line galaxies, or cosmic lanterns, help us understand the composition and fate of the Universe. These galaxies show strong emission lines from heated gas, allowing precise distance determination and insight into galaxy formation and evolution.
The neutron star collision has challenged existing theories of dark energy and gravity, ruling out a class of dark energy theories that modify gravity. The observation also supports the simplest theories, suggesting that the timing between gravitational waves and light is crucial in understanding these phenomena.
Three mathematicians argue that Einstein's General Relativity theory predicts cosmic acceleration due to an instability, contradicting the need for dark energy. The unstable Friedmann space-time exhibits accelerating local space-times with similar cosmic accelerations as dark energy theories.
A new cosmic picture of the universe's history shows a close agreement with previous findings, leaving little room for new physics that could reveal dark matter and dark energy. The results support the standard model of Big Bang cosmology, but scientists remain hopeful that new observations will offer clues about what lies beyond.
A team of scientists captured images of the kilonova explosion from a neutron star collision, detecting the first confirmed explosion from two colliding neutron stars. The detection correlates to a burst of gamma rays spotted by NASA's Fermi Gamma-ray Space Telescope.
Researchers have discovered evidence of dynamical dark energy, suggesting that the nature of dark energy may not be a constant vacuum energy. The discovery was made possible by high-precision measurements of Baryonic Acoustic Oscillations and will require confirmation from next-generation astronomical surveys.
A new study finds a model universe with no dark energy provides a slightly better fit to Type Ia supernovae data than the standard dark energy model. The 'timescape cosmology' challenges current understanding of the Universe's expansion, highlighting the need for more data and better supernova precision.
The Standard Model of cosmology has been tested to its limits by the Dark Energy Survey, with results showing that the universe clumps and expands as predicted by our best models. The survey's researchers analyzed light from 26 million galaxies to study how structures have changed over the past 7 billion years.
The Dark Energy Survey (DES) collaboration has made the most accurate measurement ever made of the present large-scale structure of the universe. The new result rivals the precision of cosmic microwave background measurements, supporting the theory that dark matter and dark energy make up 26% and 70% of the cosmos, respectively.
The University of Zurich has simulated a gigantic catalogue of 25 billion virtual galaxies from 2 trillion digital particles using the revolutionary code PKDGRAV3. This simulation will help optimize the observational strategy of the Euclid satellite, which aims to investigate dark matter and dark energy.
A Hungarian-American team suggests that standard models of the universe fail to account for its changing structure, eliminating the need for dark energy. The new model shows how the formation of complex structures affects the expansion, providing an alternative explanation for the acceleration.
Researchers at University of Chicago and Wayne State University reaffirm the reliability of Type Ia supernovae for measuring cosmic distances. The findings contradict recent claims that these supernovae are inconsistent in their brightness.
Researchers studied 36 mini-spiral galaxies and found a link between ordinary matter and dark matter. The structure of dark matter mimics visible matter in its own way, disagreeing with current hypotheses.
A team of scientists found that the evidence for an accelerating expansion of the universe may be flimsier than previously thought, with data consistent with a constant rate of expansion. The study challenges the standard cosmological concept and suggests that dark energy, a mysterious substance driving this acceleration, may not exist.
A team of physicists and astronomers has created the largest-ever three-dimensional map of distant galaxies to measure dark energy's effects on the universe's expansion. The Baryon Oscillation Spectroscopic Survey (BOSS) program reveals the structure of the universe over 650 cubic billion light years.
Scientists mapped 1.2 million galaxies in a 3D map to study the properties of dark energy and its impact on the universe's expansion rate. The map reveals the effects of dark energy, allowing astronomers to measure the amount of matter and dark energy in the present-day universe.
Researchers at UCL have created a new approach to simulate virtual universes, allowing for accelerated research into the effects of dark energy and dark matter. By comparing results from large studies to computational models, scientists can gain more accurate predictions and explore alternative versions of these mysterious substances.