James Webb Telescope glimpses possible first dark stars

Three dark stars nominated by JWST

image: These three objects (JADES-GS-z13-0, JADES-GS-z12-0 and JADES-GS-z11-0) were originally identified as galaxies in December 2022 by the JWST Advanced Deep Extragalactic Survey (JADES). Now, a team including Katherine Freese of the University of Texas at Austin speculates that they may actually be dark stars, theoretical objects much larger and brighter than our sun, powered … Read more

Unlock the mysteries of dark matter through gravitational waves

Gravitational wave dark matter astrophysics illustration

The researchers have revealed that observing gravitational waves from merging black holes can provide new insights into the nature of dark matter, according to findings presented at the 2023 National Astronomy Meeting. The international team used computer simulations to study the generation of gravitational wave signals in universes simulated with different types of dark matter. … Read more

Breakthrough Cosmology: The Role of 21-cm Forest Probes in Deciphering Dark Matter

Exploring the Forest of Dark Matter

Explore dark matter and the first galaxies at the same time as the 21cm forest. This approach can help constrain the properties of dark matter and provide insight into the thermal history of the universe. Credit: NAOC & NEU Simultaneously exploring dark matter and the first luminous galaxies: a 21-cm forestry probe could reveal the … Read more

Discrepancy in dark matter: a cosmic conundrum in the standard cosmological model

Abstract astrophysics Dark matter cosmology

An international team of astrophysicists and cosmologists has presented five papers suggesting that the aggregate (S8 value) of the universe’s dark matter is 0.76, a figure that lines up with other gravitational lensing surveys but not with the 0 value. 83 derived from the Cosmic Microwave Background. An international team of scientists used advanced techniques … Read more

Next-generation gravitational-wave detectors could pinpoint dark matter

Next-generation gravitational-wave detectors could pinpoint dark matter

Predicted upper bounds at the 90th percentile on stochastic DM signals from LIGO, LISA, GQuEST and Holometer, assuming T = 1 year of observation time and local DM density DM = 0.46 GeV/c2/cm3. The limits are derived by setting the 10th percentile SNR defined in Eq. (43) be two. Credit: arXiv (2023). DOI: 10.48550/arxiv.2306.13122 Gravitational … Read more

Next-generation gravitational-wave detectors could pinpoint dark matter

Universe Today

Gravitational astronomy is a relatively new discipline that has opened many doors for astronomers to understand how the huge, violent end of the scale works. It has been used to map merging black holes and other extreme events across the universe. Now a team at Cal Tech’s Walter Burke Institute for Theoretical Physics thinks they … Read more

What’s next for the Euclid ‘dark universe’ telescope in Europe after SpaceX’s extraordinary launch?

CAPE CANAVERAL, Fla. — A new space observatory is soaring through the void after a dramatic launch atop a SpaceX rocket on Saturday (July 1), but its journey has only just begun. Europe’s Euclid Space Telescope began its long journey into deep space on a SpaceX Falcon 9 rocket at 11:11 am EDT (1511 GMT) … Read more

The Euclid Dark Universe Space Telescope rises on a mission to unravel the deepest cosmic mysteries

Euclid's takeoff

On July 1, 2023, the Euclid spacecraft, operated by the European Space Agency (ESA), was successfully launched on a SpaceX Falcon 9 rocket from Cape Canaveral Space Force Station. The spacecraft is intended to explore the mysterious components of the Universe, dark matter and dark energy. Credit: SpaceX ESA’s Euclid spacecraft took off aboard a … Read more

Dark matter could interact in totally unexpected ways with the universe

Universe Today

According to Sir Isaac Newton’s theory of universal gravitation, gravity is an action at a distance, where one object feels the influence of another regardless of distance. This became a central feature of classical Newtonian physics which remained the accepted canon for over two hundred years. In the 20th century, Einstein began reconceptualizing gravity with … Read more

SpaceX rocket launches Euclid space telescope to map ‘dark universe’ like never before (video)

CAPE CANAVERAL, Fla. — A SpaceX rocket launched a new space telescope into orbit on Saturday (July 1) in a mission to map the “dark universe” like never before. The European Space Agency’s observatory, called Euclid, flew into space today aboard a SpaceX Falcon 9 rocket at 11:11 am EDT (1511 GMT) from Space Launch … Read more