Astronomers have compiled one of the most comprehensive maps of all matter in the universe. The large-scale effort implies a universe that is slightly smoother than we thought, suggesting that our model may be missing something.
The widely accepted theory is that the Big Bang started everything by throwing matter in all directions into the expanding universe. , certain areas had more problems than others. Over time, denser regions began to form clouds of dust and gas that condensed into stars, galaxies, and everything else.
By studying the distribution of matter in the universe today, scientists can better understand the forces that shape the universe. This includes mysteries such as dark energy, which is thought to be accelerating the expansion of the universe over time.
Scientists have now created one of the most accurate maps of matter in the universe ever. This required collecting vast amounts of data from two different telescope surveys and cross-checking them. This reduces the chance that errors in one dataset will interfere with your results.
The first is the Dark Energy Survey, a six-year project that scans the sky in near-ultraviolet, visible, and near-infrared light from the Chilean highlands. The second is the Antarctic Telescope, which studies the Cosmic Microwave Background (CMB), the afterglow of the Big Bang.
Yuuki Omori
To answer this question, scientists turned to a phenomenon called gravitational lensing. Basically, objects with enormous mass actually distort space-time itself to the point where the path of light passing through it bends. By measuring the degree of this bending, scientists can calculate the mass, or amount of matter, present in a particular area.
This analysis is largely consistent with the Lambda Cold Dark Matter (ΛCDM) model, which is currently the most widely accepted model of the Universe. But it may not have been a perfect fit — research suggests that matter is a little less cohesive than we thought, and a whole new model for explaining things better. You can open the door to
The study’s author, Eric Baxter, said, “The variability of the current universe appears to be slightly less than we would expect given the standard cosmological model anchored to the early universe.”
This is not the first crack to appear in the so-called standard model of cosmology. ΛCDM requires the presence of a mysterious matter called dark matter that can only be observed by exerting gravitational influence on ordinary matter. However, decades of experimentation have failed to detect it directly, as astronomers are convinced of its existence.
There is also a problem called Hubble tension. Basically, one method of observing the universe will give you a certain value for what is called the Hubble constant, while the ΛCDM model backed up by other methods of observation will give you an entirely different value. , both increasingly certain, but not overlapping, suggesting the possibility of new physics.
That said, researchers in the new project acknowledge that their observations of low cohesiveness in materials have yet to reach the level of statistical significance that is certainly needed. , which may help to verify this.
In any case, this new map of matter in the universe will provide a good foundation for future research.
This study was published in three journal articles. Physical Review D.
Source: University of Chicago
