Gravitational lensing (episode:4)

Why lensing is important

Lensing gives astronomers an idea about the presence, quantity, layout and effect of Dark Matter. Turning on the light depends on the intensity of the existing gravitational field on its journey. Notice the next page picture. It is known as Bullet Cluster. This cluster has been observed through visible light waves and X-ray waves. A large part of the light coming from it comes from heated X-ray radiation gas. The middle part of the smoke shown in the film is part of the visible light wave. Originally this image is an overlay or composite image of X-rays and visible light waves.
Some parts of the clouds of the picture point to the presence of dark matter in the cluster. This position was identified by estimating the lensing signal in the visible light wave. Picture of the X-ray radiation gas source and circumference of the Dark Matter region (offset) actually indicates the next condition of the collision between two galaxies clusters. During this conflict, barionic particles (intermediate objects) interacted with each other through gravity and fixed electric force. Pushing each other and pushing slow down.

But dark matter particles interact with each other only through the gravitational field. Their interaction did not have any impact or role in the electrochemical field. So in this clash, the X-ray gas particles are slightly lagging behind the Dark Matter and created this difference in the film. Almost all of the visible object is roughly at the center of the photo. But from the lensing effect we can say that most of the cluster's mass is spread over a larger area.

All of the impacts of Dark Matter's observations on gravity are all about gravitation. So many scientists think that our knowledge or idea about dark matter or gravitation is not yet complete. Maybe it is possible that Dark Matter is not a new type of object, but there is an error in our current view of gravity, which is why we can not understand Dark Matter very well.

As a result, many modified versions of the theory of gravitation were released to explain the events of Dark Matter. The bullet cluster image is a solid proof of Dark Matter's presence. If Dark Matter existed, scientists hope that the light and the behavior of the bark would be such that this offset of the photo justifies it. While Dark Matters has evidence for this position, it is difficult to explain the present gravitational theory or its accompanying revised version.

Lensing also gives a lot of speculation about the nature of dark energy. The presence of dark energy affects the creation, structure and expansion of galaxies and clusters. By analyzing their distances and distribution to determine the use of space in the space of gravitational lenses, scientists almost accurately calculate the amount of dark energy.

The impending light from the distant galaxy has started moving toward us millions of years ago. This light has exposed us to the original universe. It is possible to get information about changes in the amount of dark energy in the universe (decrease-increase or indefiniency) from the structure and location difference of the galaxy at different distances. Gravitational lensing is a tool very important to reveal the real nature of the universe, including dark matter and dark energy.