The mysterious, invisible material called dark matter holds our universe together. Since decades the scientists are trying to trace the existence of dark matter. For the first time, the researchers from Canada claim that they have successfully captured a photograph of dark matter. As the name indicates, the matter does not emit or interact with light. Our universe comprises of 25 percent of this matter.
The researchers are aware of the fact that there is a presence of a thread-like structure that constitutes a large volume of the universe. The group of researchers from the University of Waterloo has been praised for tracing the existence of dark matter. Their findings were based on gravitational leasing technique.
The captured image reveals a ghost-like object. Weak gravitational lensing causes bending of light due to the presence of large structures of the galaxy.
Mike Hudson, a professor of astronomy at the University of Waterloo and his co-author Seth Epps have published their study in Monthly Notices of the Royal Astronomical Society.
What Does Composite Image Mean?
With the help of Canada-France-Hawaii Telescope, the researchers noticed the presence of dark matter using a weak gravitational lensing that changes a galaxy’s shape by 1 percent.
For the purpose of the study, the researchers developed a lensing image consisting of a pair of galaxies located 4.5 billion light-years ahead. The image revealed a bridge-like galaxy structure. This structure suggests the interaction of dark matter with the galaxies.
Some studies also suggest that the dark matter is composed of particles called axions. But if this is supposed to be true, they can be detected easily by gravitational waves because axions, when accelerated by black holes, would release gravitational waves similar to electromagnetic waves that are released by electrons
The presence of dark matter was suspected since the 1930s and this is for the first-time researchers were able to capture its image.
With the help weak gravitational lensing technique, the researchers are able to capture these filament-like structures to estimate the extent to which this matter binds the universe.