Dark energy tagged posts

The weak lensing surveys such as HSC prefer a slightly less clumpy Universe (left) than that predicted by Planck (right). The pictures show the slight but noticeable difference as expected from large computer simulations.
Credit: Hyper Suprime-Cam Survey

An international group of researchers, including Carnegie Mellon University’s Rachel Mandelbaum, has released the deepest wide field map of the 3D distribution of matter in the universe ever made and increased the precision of constraints for dark energy with the Hyper Suprime-Cam survey (HSC).

The present-day universe is a pretty lumpy place...

Artistic impression of a Multiverse — where our Universe is only one of many. According to the research varying amounts of dark energy have little effect on star formation. This raises the prospect of life in other universes — if the Multiverse exists. Credit: Image by Jaime Salcido/simulations by the EAGLE Collaboration

A Multiverse – where our Universe is only one of many – might not be as inhospitable to life as previously thought, according to new research. Questions about whether other universes might exist as part of a larger Multiverse, and if they could harbour life, are burning issues in modern cosmology...

Images of one of the transient events, from eight days before the maximum brightness to 18 days afterwards. This outburst took place at a distance of 4 billion light years. Credit: M. Pursiainen / University of Southampton

Gone in a (cosmological) flash: a team of astronomers found 72 very bright, but quick events in a recent survey and are still struggling to explain their origin. The scientists found the transients in data from the Dark Energy Survey Supernova Programme (DES-SN). This is part of a global effort to understand dark energy, a component driving an acceleration in the expansion of the Universe. DES-SN uses a large camera on a 4-metre telescope in the Cerro Tololo Inter-American Observatory (CTIO) in the Chilean Andes...

In the new dark matter model, the Higgs particle has different properties to those in the standard model of particle physics. The figure shows the energy of the Higgs particle as a function of the model parameters.
Credit: Ill./©: Michael Baker, JGU

Theoretical physicists present an alternative to the WIMP paradigm. Very little is known about dark energy, but there are many theories and experiments on the existence of dark matter designed to find these as yet unknown particles. Scientists at Johannes Gutenberg University Mainz (JGU) in Germany have now come up with a new theory on how dark matter may have been formed shortly after the origin of the universe. This new model proposes an alternative to the WIMP paradigm that is the subject of various experiments in current research.

Dark matt...