According tomedia reports, the European Space Agency XMM-Newton satellite’s latest observations found that the temperature of the gas lurking in the Galaxy halo is much higher than expected, its chemical composition is different from expected, which poses a challenge to our exploration of the origin of the Milky Way.
Scientists based their latest findings on Observations from the XMM-Newton satellite show that the Milky Way halo contains more than one, but three different hot gases, the highest temperature of which is 10 times higher than expected. They also point out that there is a diverse gas component not only in the Milky Way, but in any galaxy.
The halo is a large ring structure that surrounds the galaxy, consisting of gas, stars, and invisible dark matter, and is an important part of the galaxy, connecting the wider galactic space and is therefore considered to be a vital role in the evolution of galaxies.
Previously, scientists believed that the galaxy halo contained a single temperature of hot gas, the exact temperature of the gas depends on the mass of the galaxy.
However, scientists based their latest findings on observations from the XMM-Newton satellite that the Milky Way halo contains more than one, but three different hot gases, the highest temperature of which is 10 times higher than expected. They also point out that there is a diverse gas component not only in the Milky Way, but in any galaxy.
“We think the galaxy halo gas temperature is 10,000 to 1 million degrees Celsius, and even some of the gas in the halo can reach 10 million degrees Celsius, ” said Sanskriti Das, a graduate student at the University of Ohio. “
Although we think that when the galaxy first formed, the gas would be heated to 1 million degrees Celsius, we are not sure how the gas portion became hot and hot, speculating that it may be related to stellar winds released by the disk in the Milky Way.
The study combined observations from two on-board survey instruments of the XMM-Newton satellite, the Reflective Grating Spectrometer (RGS) and the European Photonic Imaging Camera (EPIC), which is used to study the light released by the halo, which is used to study how the halo affects and absorbs the light passing through it.
To see how the Milky Way halo absorbs light, Das and colleagues observed the yaostar, a very active, energy-filled core of distant galaxies that continuously releases intense light.
The X-rays released by the yaostar travel edgy nearly 5 billion light-years through the universe and pass through the Milky Way halo before reaching the XMM-Newton satellite probe, which will provide important clues to the exploration of the gaseous region’s properties.
Unlike previous X-ray studies of the Milky Way halo, which typically lasted only one to two days, Das and colleagues conducted three weeks of observational analysis, allowing them to detect very dim, unobservable signals.
Study co-author Smita Mathur, of Ohio State University, said: “We analyzed the light released by the yaostar and locked its spectral features, which will reveal the way the flare difoeped through the Milky Way.” There are some signals that exist only under certain temperature conditions, so we are able to determine the temperature value of the halo gas and analyze how it affects the flare dilexic light. “
At the same time, the Milky Way’s fiery halo is rich in elements heavier than helium, usually produced in the late stages of star life, suggesting that the halo receives material from the end of life of certain stars, which, when they die, throw cosmic material into space.
So far, Das stressed, scientists have been looking for oxygen because it is rich in content and therefore easier to find than other elements, and our research is more detailed, not only studying oxygen, but also analyzing helium, argon and iron, and making some very interesting discoveries.
Scientists expect the proportion of elements in the Milky Way halo to be similar to that contained in the solar system, and Das and colleagues note that fewer iron elements are expected in the halo, suggesting that there are large numbers of dying stars in the Halo and that there is less oxygen, possibly because dust particles in the halo absorb oxygen.
‘This latest is really exciting and completely unexpected,’ Das said, revealing how the Milky Way has evolved into what it is today, and we need more discovery.
The newly discovered hot gas composition also has a broader meaning, affecting our overall understanding of the universe. In fact, the Milky Way contains far less mass than we expected, which is called the “lost matter problem” because what we observe is not consistent with theoretical predictions.
In the long-term mapping of the universe, scientists based on the European Space Agency Planck spacecraft observation data analysis, the universe less than 5% of the mass should be in the form of “normal matter”, these substances make up stars, galaxies, planets and so on.
‘When we take all the observed material into account, it’s a far cry from previous predictions,’ said study co-author Fabrizio Nicastro of Italy’s National Institute of Astrophysics (INAF). Some experts may be hiding in the huge halo that extends around the Milky Way, and these ideas make our latest research exciting!
Because the high temperature components of the Milky Way halo have never been found before, scientists are likely to ignore it, meaning that the Milky Way halo contains a large amount of “missing” material.