Star Formation

The basic idea of ​​star formation is gravity shrinkage - contraction of the gas region under the influence of gravity. This is a simple process that is expected to occur in a region of sufficiently high density of material so that atomic collisions can radiate energy. However, star formation must occur only in a few regions, as the gas must be of sufficient density to impinge and the temperature must be low enough that the atomic velocity can not escape from the gravity of the system. The majority of galaxy stars are in molecular clouds - expanding cold clouds, primarily hydrogen and helium.

M83 has a complex multiphase gas halo. The gas in these auras is particularly interesting for astronomers. Because they are important to advance the knowledge of star formation. This is because the gas required for continuous star formation most likely comes from the gas reservoir located in the halo around the galaxy. A warm ionized gas at a temperature of approximately 1,000 K is called a hyperplane diffusive ionization gas (or eDIG). It is well known that eDIG has different characteristics compared to the gas in the star region. Therefore, astronomers are still looking for more evidence of this ionized gas in the galaxy.

Most of the water in the universe is a byproduct of star formation. Star formation involves strong gas and dust. When the outflow of this material eventually affects the surrounding gas, the resulting shock wave compresses and heats the gas. Observed water is rapidly generated in this warm and dense gas. On July 22, 2011, a report explains the discovery of a huge water vapor cloud, including "over 140 trillion times of water on all the oceans on Earth", around Tropon, which is at a distance of 12 billion light-years from Earth did. . According to researchers, "The survey results show that water is ubiquitous throughout the process of existence."