Universe

Studying Missing Matter in the Universe

About a week ago, astronomers announced that they have traced the source of a “quick burst of radio”, (RRR, or FRB in stands for fast radio burst), a burst of radio waves that releases instantly the equivalent of all the energy released by the Sun for a month.The cause of these flashes is still a mystery, but discovering the Galaxy where one of them originated would have an importance which would extend throughout the cosmology.

Evan Keane and his colleagues had used radio telescopes in Australia (Parkes) and Germany (Effelsberg) to track the RRR, called FRB 150,418, and an optical telescope in Hawaii (Subaru) to track the origins of Galaxy. This would have allowed not only tell us weigh the Universe, but also to find the missing baryonic matter. Establish a new way to measure the expansion of the universe.

It turns out that the alleged “discovery” is being questioned by other teams.

Given the importance of the alleged discovery, Peter Williams and colleagues at the Harvard-Smithsonian Center for Astrophysics rushed to another radio telescope (VLA in relief-USA) in order to monitor the Galaxy indicated as the source of the FRB 150,418.

While the original team claims that the brightness of the Galaxy had faded over the course of six days, Williams discovered that she had begun to shine again, issuing new radio signals. This should not happen if the quick burst of radio if originated from a cosmic collision, as Keane said.

Thus, the most likely explanation is that the Galaxy has an Active Galactic nucleus, a well-known phenomenon in which a central region of the Galaxy features a variable glow in various wavelengths, including the radio frequency.

Periodic RRRs

Practically at the same time, Laura Spitler, the Max Planck Institute for radio astronomy, used the Arecibo radio telescope in Puerto Rico, to discover something that changes all the little that was known about the quick bursts of radio.

Laura detected an RRR periodic, which emits beams of radio waves repeatedly, sometimes several of them in less than a minute.

All quick bursts of radio detected so far appeared to be single events. So most of the theories about the origin of these mysterious cataclysmic incidents involves pulses destroy its source-a star exploding as a supernova, for example, or a neutron star falling into a black hole.

I wouldn’t give so to accommodate this RRR periodic, more like a pulsar, with the idea of Keane and the subsequent observation of new sparkles made by Williams? Laura and his group believe that not because the RRR has much weaker periodic, but also not punching with the cataclysmic event that was the FRB 150,418.

“However, the apparent conflict between the studies could be resolved if there are at least two types of RRR sources,” said Professor Victoria Kaspi, McGill University, involved in the observation of Laura.

In other words, this novel which has already begun to extend may have new chapters.

Lost matter in the universe

In the original article, Keane and his colleagues claim that, as when traveling to Earth these radio waves pass through all the matter in the way, including the cosmic dust, the Galaxy and the RRR will permit monitoring calculate the material present on the road, performing a kind of weighing of the Universe.

And that, claims the team, would have solved a cosmic mystery, the so-called “lost matter” of the universe.

Just to remind: by current cosmological model, 70% of the universe is composed of dark energy, 25 percent dark matter and 5% by ordinary matter, formed by atoms of the periodic table. The problem is that, until now, astronomers were able to detect just half of those 5% of baryonic matter, which led to the coinage of the term “lost matter” of the universe.

If the RRR if originated even the Galaxy indicated by the team, the data indicated that there would be twice that expected in relation to previous calculations, which would mean that matter lost had been found. “The missing matter is not anymore missing,” said Keane when in the publication.

Future detections

Anyway, with so many possibilities raised with the possible detection of a single phenomenon, it is natural that several teams around the world begin to hone their techniques to try to catch a cataclysmic and trace their origin RRR.