Gravitational gravity

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Scheme of gravitational collapse mechanism.

Gravity collapse, collapse - the collapse of the mass of matter under the influence of gravity. One of the most common processes taking place in the Universe in various spatial and temporal scales, from the formation of galaxy clusters, galaxies, to the birth, evolution and death of the stars. Gas cloud collapse happens when it is not possible to maintain a hydrostatic balance, ie when the total gas pressure is not able to balance the gravitational effects. This condition is achieved by any mass of matter that exceeds the critical mass, known as Jeans mass.

A factor that plays a significant role in this process is the magnetic field, which is the source of additional pressure (magnetic pressure) and allows for the removal of momentum from the cloud.

Observations of cloud fall are not possible directly due to their high opacity (outside the radio range). This process is indirectly observed by accompanying phenomena (eg, maserate emissions in emerging protostars).

In the final phase of massive stars' evolution, the star's nucleus is too low for the fusion reactions to provide the right amount of energy needed to maintain the balance. Depending on the star's mass, there are three possible scenarios:

During the evolution of massive stars, a very violent gravitational collapse can occur. The resulting explosion is the cause of the supernova flare.

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