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The magnetic soul of the universe

The magnetic soul of the universe 1

“In 1945, the primitive appearance of pre-intelligent primates on planet Earth blew up the first thermonuclear device. They did not suspect that they created an echo in the super-space web, used for non-local communication and the transmigration of souls by the civilizations of the Trans-galactic union, network , which the more mysterious races call the “body of God.”

Shortly afterwards, the secret forces of intelligent races were sent to Earth to observe the situation and prevent further electromagnetic destruction of the universal network. “

The introduction taken in quotation marks looks like a plot for science fiction, but just such a conclusion can be drawn after reading this scientific article. The presence of this network pervading the entire Universe could explain a lot – for example, the UFO phenomenon, their elusiveness and invisibility, incredible possibilities, and besides, indirectly, this theory of the “body of God” gives us real evidence that there is life after death.

We are at the very initial stage of development, and in fact we are “pre-intelligent beings” and who knows if we can find the strength in ourselves to become a truly intelligent race. Astronomers have discovered that magnetic fields permeate much of space. Hidden lines of the magnetic field extend for millions of light years throughout the universe.

The magnetic soul of the universe 2

Each time astronomers come up with a new way to search for magnetic fields in more and more distant regions of space, they inexplicably find them.

These force fields are the same entities that surround the Earth, the Sun and all galaxies. Twenty years ago, astronomers began to discover magnetism permeating entire clusters of galaxies, including the space between one galaxy and the next. Invisible field lines sweep through intergalactic space.

Last year, astronomers finally managed to explore a much more sparse region of space – the space between clusters of galaxies. There they discovered the largest magnetic field: 10 million light-years of magnetized space, covering the entire length of this “thread” of the cosmic web. A second magnetized thread has already been seen elsewhere in space using the same methods. “We’re just looking at the tip of the iceberg, probably,” said Federica Govoni of the National Institute of Astrophysics in Cagliari, Italy, who led the first discovery.

The question arises: where did these huge magnetic fields come from?

“This clearly cannot be associated with the activity of individual galaxies or individual explosions or, I do not know, winds from supernovae,” said Franco Vazza, an astrophysicist at the University of Bologna, who makes modern computer simulations of cosmic magnetic fields. “This goes far beyond all this.”

One possibility is that cosmic magnetism is primary, tracing all the way back to the birth of the universe.In this case, weak magnetism must exist everywhere, even in the “voids” of the cosmic web – the darkest, most empty areas of the universe. Omnipresent magnetism would sow stronger fields that bloomed in galaxies and clusters.

Primary magnetism could also help solve another cosmological puzzle known as Hubble stress – probably the hottest topic in cosmology.

The problem underlying Hubble’s tension is that the Universe seems to expand much faster than expected based on its known components. In an article published on the Internet in April and reviewed with Physical Review Letters, cosmologists Karsten Jedamzik ​​and Levon Poghosyan argue that weak magnetic fields in the early Universe will lead to the faster cosmic expansion observed today.

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Primitive magnetism removes Hubble’s tension so simply that Jedamzik ​​and Poghosyan’s article immediately attracted attention. “This is a great article and an idea,” said Mark Kamionkovsky, a theoretical cosmologist at Johns Hopkins University who proposed other solutions to Hubble’s tension.

Kamenkovsky and others say that additional checks are needed to ensure that early magnetism does not interfere with other cosmological calculations. And even if this idea works on paper, researchers will need to find convincing evidence of primary magnetism to make sure that it is the missing agent that formed the universe.

However, in all these years of talking about Hubble stress, it is perhaps strange that no one has considered magnetism before. According to Poghosyan, who is a professor at Simon Fraser University in Canada, most cosmologists hardly think about magnetism. “Everyone knows this is one of those big puzzles,” he said. But for decades there was no way to say whether magnetism is indeed ubiquitous and, therefore, is the primary component of the cosmos, so cosmologists have largely stopped paying attention.

Meanwhile, astrophysicists continued to collect data. The weight of evidence made most of them suspect that magnetism is indeed present everywhere.

The magnetic soul of the universe

In 1600, an English scientist William Gilbert, studying mineral deposits — naturally magnetized rocks that humans have created in compasses for millennia — came to the conclusion that their magnetic force “mimics the soul.” “He correctly suggested that the Earth itself is“ a great magnet, ”and that the magnetic pillars“ look toward the poles of the Earth. ”

Magnetic fields occur at any time when an electric charge flows. The Earth’s field, for example, comes from its internal “dynamo” – a stream of liquid iron, seething in its core. Fields of fridge magnets and magnetic columns come from electrons orbiting around their constituent atoms.

Cosmological modeling illustrates two possible explanations of how magnetic fields penetrated galaxy clusters. On the left, the fields grow out of homogeneous “seed” fields that filled the space in the moments after the Big Bang. On the right, astrophysical processes, such as the formation of stars and the flow of matter into supermassive black holes, create magnetized winds that exit galaxies.

However, as soon as a “seed” magnetic field arises from charged particles in motion, it can become larger and stronger if weaker fields are combined with it. Magnetism “is a bit like a living organism,” said Thorsten Enslin, a theoretical astrophysicist at the Institute of Astrophysics Max Planck in Garching, Germany – because magnetic fields connect to every free source of energy that they can hold onto and grow. They can spread and influence other areas through their presence, where they also grow. ”

Ruth Durer, a cosmologist and theoretician at the University of Geneva, explained that magnetism is the only force besides gravity that can shape the large-scale structure of the cosmos, because only magnetism and gravity can “reach you” at great distances. Electricity, on the contrary, is local and short-lived, since the positive and negative charge in any region will be neutralized as a whole. But you cannot cancel magnetic fields; they tend to take shape and survive.

And yet, despite all its power, these force fields have low profiles. They are intangible and are perceived only when they act on other things. ”You cannot just photograph a magnetic field; it doesn’t work like that, “Van Reuen, an astronomer at Leiden University who was involved in the recent discovery of magnetized filaments, told Reinu Van.

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Last year, Van Verin and 28 collaborators suggested a magnetic field in the filament between clusters of galaxies Abell 399 and Abell 401 is the way the field redirects high-speed electrons and other charged particles passing through it. As their paths spin in the field, these charged particles emit faint “synchrotron radiation.”

The synchrotron signal is strongest at low frequencies, making it ready to be detected with LOFAR, an array of 20,000 low-frequency radio antennas scattered across Europe.

The team actually collected data from the filament back in 2014 for one eight-hour span, but the data sat waiting as the radio astronomy community spent years figuring out how to improve the calibration of LOFAR measurements. The Earth’s atmosphere refracts the radio waves passing through it, so LOFAR considers space from the bottom of the swimming pool. The researchers solved the problem by tracking the vibrations of the “beacons” in the sky – the emitters with precisely known locations – and adjusting the vibrations for this to release all the data. When they applied the de-blurring algorithm to the data from the filament, they immediately saw the glow of the synchrotron radiation. LOFAR consists of 20,000 individual radio antennas scattered throughout Europe.

The magnetic soul of the universe 2

The filament looks magnetized everywhere, and not just near clusters of galaxies that move towards each other from both ends. Researchers hope the 50-hour dataset they are currently analyzing will reveal more details. Recently, additional observations have revealed magnetic fields propagating along the entire length of the second filament. Researchers plan to publish this work soon.

The presence of huge magnetic fields in at least these two strands provides important new information. “It caused quite a bit of activity,” Van Faith said, “because now we know that magnetic fields are relatively strong.”

Light through the Void

If these magnetic fields arose in the infant Universe, the question arises: how? “People have been thinking about this issue for a long time,” said Tanmai Wachaspati of Arizona State University.

In 1991, Vachaspati suggested that magnetic fields could arise during an electroweak phase transition – a moment, a split second after the Big Bang, when electromagnetic and weak nuclear forces became distinguishable. Others have suggested that magnetism materialized microseconds later when protons formed. Or soon after: the late astrophysicist Ted Harrison claimed in the earliest original theory of magnetogenesis in 1973 that turbulent plasma of protons and electrons may have caused the appearance of the first magnetic fields. Nevertheless, others suggested that this space became magnetized even before all this, during space inflation – the explosive expansion of space that supposedly jumped up and launched the Big Bang itself. It is also possible that this did not happen before the growth of structures a billion years later.

A way to test theories of magnetogenesis is to study the structure of magnetic fields in the most pristine parts of the intergalactic space, such as the calm parts of filaments and even more empty voids. Some details — for example, whether the field lines are smooth, spiral, or “curved in all directions, like a ball of yarn or something else” (according to Vachaspati), and how the picture changes in different places and at different scales — carry rich information that can be compared with the theory and modeling, for example, if the magnetic field occurred during the electroweak phase transition, as suggested by Vacaspati, the resulting power lines should be spiral, “like a corkscrew,” -. he said.

The catch is that it is difficult to detect the force fields, who have nothing to press on.

One of the methods, first proposed by the English scientist Michael Faraday back in 1845, detects a magnetic field by the way it rotates the direction of polarization of the light passing through it. The magnitude of the “Faraday rotation” depends on the strength of the magnetic field and the frequency of light. Thus, by measuring the polarization at different frequencies, you can conclude about the strength of magnetism along the line of sight. “If you do it from different places, you can make a 3D map,” Enslin said.

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Researchers have begun making rough measurements of Faraday rotation using LOFAR, but the telescope has problems emitting an extremely weak signal. Valentina Wakka, an astronomer and colleague of Govoni from the National Institute of Astrophysics, developed an algorithm several years ago for the statistical processing of thin Faraday rotation signals, adding together many dimensions of empty spaces. “In principle, it can be used for voids,” said Wakka.

But the Faraday method will really take off when the next generation radio telescope, a gigantic international project called “an array of square kilometers”, is launched. “SKA should create a fantastic Faraday grid,” said Enslin.

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At the moment, the only evidence of magnetism in voids is that observers do not see when they look at objects called blazars located behind voids.

Blazars are bright beams of gamma rays and other energy sources of light and matter, fed by supermassive black holes. When gamma rays travel through space, they sometimes collide with ancient microwaves, turning into electron and positron as a result. These particles then hiss and turn into low-energy gamma rays.

But if blazar light passes through a magnetized void, then low-energy gamma rays will appear absent, argued Andrei Neronov and Evgeny Vovk from the Geneva Observatory in 2010. The magnetic field will deflect electrons and positrons from the line of sight. When they decay into low-energy gamma rays, these gamma rays will not be directed at us. Indeed, when Nero and Vovk analyzed the data from a suitably located blazar, they saw its high-energy gamma rays, but not its low-energy gamma signal. “This is the lack of a signal, which is the signal,” said Vachaspati.

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The absence of a signal is hardly a smoking weapon, and alternative explanations have been proposed for missing gamma rays. However, subsequent observations increasingly point to the hypothesis of Neronov and Vovkov that the voids are magnetized. “This is a majority opinion,” said Dürer. Most convincingly, in 2015, one team superimposed many dimensions of blazars behind voids and managed to tease the faint halo of low-energy gamma rays around blazars. The effect is exactly what one would expect if the particles were scattered by weak magnetic fields – measuring only about one millionth of a trillion as strong as a refrigerator magnet.

The biggest mystery of cosmology

It is amazing that just this amount of primary magnetism can be exactly what is needed to resolve the Hubble stress – the problem of the surprisingly fast expansion of the Universe.

This is precisely what Poghosyan understood when he saw the recent computer simulations of Carsten Jedamzik ​​from the University of Montpellier in France and his colleagues. Researchers added weak magnetic fields to the simulated plasma-filled young Universe and found that protons and electrons in the plasma flew along the lines of the magnetic field and accumulated in areas of the weakest field strength. This coalescence effect caused protons and electrons to combine into hydrogen — an early phase change known as recombination — earlier than they might otherwise have.

Poghosyan, reading an article by Jedamzik, realized that this could relieve Hubble’s tension. Cosmologists calculate how fast space should expand today by observing the ancient light emitted during recombination. Light shows a young Universe dotted with blots that were formed from sound waves lapping around in the primary plasma. If recombination occurred earlier than anticipated due to the thickening effect of magnetic fields, then sound waves could not propagate so far forward, and the resulting drops would be smaller. This means that the spots that we see in the sky from the time of recombination should be closer to us than the researchers assumed. The light emanating from the clots had to travel a shorter distance to reach us, which means that the light had to pass through a faster expanding space. “It’s like trying to run on an expanding surface; you cover a smaller distance, ”said Poghosyan.

The result is that smaller droplets mean a higher expected speed of cosmic expansion, which greatly brings the estimated speed closer to measuring how fast supernovae and other astronomical objects actually seem to fly apart.

“I thought, wow,” said Poghosyan, “this may indicate to us the real presence of [magnetic fields]. Therefore, I immediately wrote to Karsten.” The two met in Montpellier in February, just before the prison closed, and their calculations showed that, indeed, the amount of primary magnetism needed to solve the Hubble tension problem is also consistent with the blazar observations and the estimated size of the initial fields needed for the growth of huge magnetic fields , covering clusters of galaxies and filaments. “So, it all somehow converges,” said Poghosyan, “if that turns out to be true.”

References: Quanta Magazine

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