Scientists weigh the balance of matter in galaxy clusters

The result is to use the first observation data to measure this balance, which is theoretically assumed 20 years ago and will give a new view on the relationship between ordinary matter that emits dark and light matter and how our universe expands.

Galaxy clusters are the largest objects in the universe, each consisting of about 1000 massive galaxies. They contain large amounts of dark matter, hot gases, and ordinary matter such as stars and cold gases.

Dark matter:

In a new study published in Nature Communications, a team of international astrophysicists led by the University of Michigan in the US and the University of Birmingham in the United Kingdom, used data from the LoCuSS study to link between local cluster substructure to measure three main tables. Components such as galaxy clusters, dark matter, hot gas, and stars.

Members of the research team spent 12 years collecting data on the wavelength factor of 10 million using the Chandra and XMM-Newton satellites, the ROSAT All-Sky Survey, the Subaru Telescope, the UK Infrared Telescope (UKIRT), and the Mayall Telescope. Satellite of Suvayev-Zeldovich-Massif and Planck. With a statistical model and sophisticated algorithm built by Dr. med. Arya Farahi, during her doctorate at the University of Michigan, the team was able to conclude that the amount of gas and stars in the group, which they explored almost evenly from the mass of darkness. This means that when stars are formed, the amount of available hot gas decreases proportionally

Groups of galaxies:

This confirms the predictions of the existing cold dark matter theory. Everything is in line with our understanding of the universe, said Dr. Farahi, currently a PhD Makkiliams student in the Department of Physics at Carnegie Mellon University.

Dr. Graham Smith’s School of Physics and Astronomy at the University of Birmingham and leading LoCuSS investigators said: The amount of matter in the universe collapsed to form groups of galaxies.

But once formed, this cluster is a closed box. Hot gas has been formed into stars or remains as gas, but the total remains.

Total mass of the system:

This study has been supported by more than a decade of investing in telescopes, added Professor August Evrard of the University of Michigan. With these high-quality data, we can characterize 41 clusters to characterize galaxies and find special relationships, especially anticorelirano to feed masses in stars and tables in hot gases. This is important because these two measurements provide the best indication of the total mass of the system.

The results will be very important for the efforts of astronomers to measure the properties of the entire universe. By better understanding the internal physics of galaxy clusters, researchers will be able to better understand the behavior of dark energy and the process behind the expansion of the universe.

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