Cosmology News

How can machine learning methods help us understand our tangled cosmic web? A new study presents a ‘deep learning’ framework to shed light onto the physics of the formation of dark matter halos. The results show that spherical averages over the initial conditions of the Universe carry the most relevant information about the final mass of halos. more

Three years into its quest to reveal the nature of dark energy, the Hobby-Eberly Telescope Dark Energy Experiment (HETDEX) is on track to complete the largest map of the cosmos ever. The team will create a three-dimensional map of 2.5 million galaxies that will help astronomers understand how and why the expansion of the universe is speeding up over time. Scientists in Munich and Garching have contributed to the design of the survey strategy, planning and execution as well as developing key software and data management tools for the cosmology data analysis. more

Dark matter is the most abundant matter component in the universe. But while it influences all structure in the universe, its nature is still unknown. Among the many candidates is ultra-light dark matter, the lightest possible candidate for dark matter, which been receiving a lot of attention recently, as this might be probed by current and future experiments. MPA researchers have written a review on the current status of these models and their search for observational markers, introducing a division into three classes and showing how the rich phenomenology of this leading candidate for dark matter could help answer the question of what dark matter really is. more

Using Planck data from the cosmic microwave background radiation, an international team of researchers has observed a hint of new physics. The team developed a new method to measure the polarization angle of the ancient light by calibrating it with dust emission from our own Milky Way. While the signal is not detected with enough precision to draw definite conclusions, it may suggest that dark matter or dark energy causes a violation of the so-called “parity symmetry”. more

How hot is the Universe today? How hot was it before? A new study, which has been published in the Astrophysical Journal, suggests that the mean temperature of gas in large structures of the Universe has increased ten times over the last 10 billion years, to reach about 2 million Kelvin today. more

Go to Editor View