How are the bars in barred spiral galaxies thought to have formed?(1 point) Responses merging merging primordial collapse primordial collapse separation separation slow evolution slow evolution
The bars in barred spiral galaxies are thought to have formed through the process of slow evolution.
Where is most of the baryonic matter (ordinary matter) of the universe found?(1 point) Responses in comets and asteroids in comets and asteroids in dark matter and dark energy in dark matter and dark energy in planets and natural satellites in planets and natural satellites in interstellar gases and stars
Most of the baryonic matter (ordinary matter) of the universe is found in interstellar gases and stars.
Bars in barred spiral galaxies are thought to have formed through a process called slow evolution. This happens over time as stars and matter within the galaxy gradually rearrange themselves under the influence of gravity. The slow evolution of the galaxy's structure leads to the formation of a central bar-shaped structure.
The bars in barred spiral galaxies are thought to have formed through a process called "slow evolution." This answer is worth 1 point.
To understand how this conclusion was reached, let's break it down step by step:
1. Observations: Scientists have carefully observed and studied barred spiral galaxies in order to understand their formation process. They use telescopes to collect data and images from various galaxies.
2. Detection of bars: By examining the observed galaxies, astronomers have noticed the presence of bars in the center of some spiral galaxies. Bars are elongated structures that extend from the central bulge of the galaxy.
3. Theoretical models: Scientists have developed theoretical models to simulate the formation and evolution of galaxies. These models take into account various factors such as gravity, gas dynamics, and dark matter.
4. Simulations and computer modeling: Using computer simulations and modeling, scientists run virtual experiments to understand how galaxies evolve over time. They simulate the conditions of the early universe and simulate the formation of galaxies.
5. Comparison with observations: The results of the simulated models are then compared with observations of real galaxies. Scientists look for similarities between the simulated formation processes and the observed structures of barred spiral galaxies.
6. Evolution over time: Through this process of comparison, scientists have found that the formation of bars in barred spiral galaxies is best explained by a slow evolution scenario. This means that the bars were not formed instantaneously but rather developed over long periods of time due to interactions and gravitational forces within the galaxy.
It is important to note that the exact mechanisms of bar formation are still an area of active research, and there may be variations in the scenarios depending on the specific galaxy being studied. However, based on current understanding, the consensus points towards slow evolution as the main process for bar formation in barred spiral galaxies.