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Mysterious radio signal in space looks like a heartbeat



Mysterious radio signal in space looks like a heartbeat

A mysterious radio burst with a heartbeat-like character has been discovered in space.

Astronomers estimate that the signal came from a galaxy about a billion light-years away, but the exact location and cause of the outburst remain unknown. The study, detailing the results, was published on Wednesday at nature magazine.

Fast radio bursts, or FRBs (Fast Radio Bursts), are intense bursts of radio waves lasting only milliseconds, the origin of which is unknown. The first FRB was discovered in 2007, and since then, hundreds of such fast cosmic flares have been detected, coming from many distant points throughout the universe.

Many FRBs emit very bright radio waves that last no more than a few milliseconds before disappearing completely, and about 10% of these are known to be repetitive and patterned.

Fast radio bursts are so fast and unexpected that they are difficult to observe.

One of the resources used to detect them is a radio telescope called the Canadian Hydrogen Intensity Mapping Experiment (CHIME) at the Dominion Radio Astrophysical Observatory in British Columbia, Canada.

This radio telescope, which has been in operation since 2018, constantly monitors the sky and, in addition to fast radio bursts, is sensitive to radio waves emitted by distant hydrogen in the universe.

On December 21, 2019, astronomers using CHIME noticed something that immediately caught their attention: a fast burst of radio signal that was “in many ways unusual,” according to Daniele Michilli, a PhD researcher at the Kavli Institute of the Institute of Astrophysics and Space Science . at the Massachusetts Institute of Technology.

The signal, named FRB 20191221A, lasted up to three seconds, about 1,000 times longer than typical fast radio bursts.

Michilli was monitoring data coming from CHIME when the explosion occurred. This was the longest running FRB found to date.

“It was unusual,” Michilli said. “Not only was it very long, about three seconds, but also intermittent bursts that were amazingly accurate, emitting every fraction of a second — boom, boom, boom — like a heartbeat. This was the first time that the signal itself was periodic.”

Although FRB 20191221A has yet to repeat, “the signal is formed by a sequence of successive peaks that we found to be separated by about 0.2 seconds,” Michilli said in an email.

unknown origin

The research team doesn’t know the exact galaxy the burst came from, Michilli said, and even the estimated distance of 1 billion light-years is “very uncertain.” While CHIME is ready to look for bursts of radio waves, it is not as good at finding their points of origin.

However, CHIME is being developed as part of a project in which additional telescopes currently under construction will conduct joint observations and be able to triangulate radio bursts to specific galaxies, Michilli said.

But the signal contains clues about where it came from and what might have caused it.

“CHIME has already discovered many FRBs with different properties,” Michilli added. “We have observed how some of them live in very turbulent clouds, while others seem to live in a clean environment. Judging by the properties of this new signal, we can say that there is a plasma cloud around this source, which should be extremely turbulent.”

When the researchers analyzed FRB 20191221A, the signal was similar to the ejecta emitted by two different types of neutron stars, or the dense aftermath of a giant star’s death, called radio pulsars and magnetars.

Magnetars are neutron stars with incredibly powerful magnetic fields, while radio pulsars emit radio waves that pulsate as the neutron star rotates. Both stellar objects create a signal similar to the flickering beam of a beacon.

The fast radio burst appears to be more than a million times brighter than these emissions. “We think this new signal could be a magnetar or a pulsar on steroids,” Michilli said.

The research team will continue to use CHIME to monitor the sky for new signals from this radio burst, as well as others with a similar periodic signal. The frequency of radio waves and how they change could help astronomers learn more about the rate at which the universe is expanding.

“This discovery raises the question of what could have caused this extreme signal, which we have never seen before, and how we can use this signal to study the universe,” Michilli said. “Telescopes of the future promise to detect thousands of FRBs per month, and by then we may be able to detect many more of these periodic signals.”

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The Earth was hit by the solar wind at a speed of 600 kilometers per second



Ilustração vento solar a atingir a Terra

We really do not live in peacetime. There is talk of extreme droughts, wars, fires, economic crises, and even in space, our star insists on whipping the planet with solar winds that surprise scientists who study these phenomena. The most recent case was a solar storm that hit Earth over the weekend. Without warning, the winds “hit” our planet in a completely unexpected way.

On Sunday, a stream of solar wind hit the Earth’s magnetic field, the speed of which reached more than 600 kilometers per second.

As we already mentioned, our star is in its 25th cycle, and when it began, the researchers left an alert that this new 11-year period will not be as calm as the last one, which ended at the end of 2019.

Some events, such as the M4.4 class solar flare or the X-class flare that occurred in 2021, show ongoing activity on our star. By the way, we saw that a G1 class storm was predicted last week. According to NOAA, this event, which reached us on August 3, did not cause any problems and its origin was associated with a hole in the sun. as explained here.

Image of auroras caused by solar winds hitting our atmosphere

The Earth received an unexpected impact at a speed of more than 600 kilometers per second

Without warning, a strong gust of solar wind hit Earth last Sunday. While it's not all that alarming - solar storms often hit our planet and cause spectacular auroras - it's strange that this storm was completely unexpected.

This event was not in the forecast, so the auroras that arose came as a surprise.

informed SpaceWeather.

The solar wind occurs when a stream of high-energy particles and plasma can no longer be held by the Sun's gravity and erupts towards the Earth. Because how our Sun works is still largely unknown, these emissions are thought to come from large, bright spots on the Sun known as "corona holes." These events taking place on a star have been observed for a long time, and there is a lot of observational work being done here on Earth.

Picture of two holes in the sun

Through this attention to holes, scientists have been able to create "predictions" of space weather. They can already predict when these solar storms or solar flares, also known as coronal mass ejections (CMEs), will come our way. Plus, you can already see how powerful they will be.

However, this does not mean that the Sun does not surprise us and hit us without warning, as it did over the weekend.

But how was this effect of solar winds on our planet discovered?

Earlier Sunday, NASA's Deep Space Climate Observatory (DSCOVR) observed solar wind light streams that increased significantly and unexpectedly throughout the day. The cause of this solar storm is still unknown, but SpaceWeather suggests it may have been an early arrival of the solar wind, which is expected to come from an equatorial hole in the Sun's atmosphere two days later. Or it could be a lost coronal mass ejection (CME).

The inhomogeneity of the solar wind data at 00:45 UT on August 7 suggests a shock wave embedded in the solar wind.

Today, the active sun produces so many small explosions that it is easy to ignore the faint coronal ejections heading towards Earth.

This is how he described the SpaceWeather service.

It is interesting to note that as of today, August 9, the high-speed solar wind continues to beat the Earth's magnetic field, with records showing speeds as high as 551.3 kilometers per second. This new "attack" on our natural shield began this morning at 5 am.

The good news is that the solar wind is not harmful to us here on Earth. This is because we are safely protected by our planet's atmosphere.

However, when the "collision" is strong, our technologies can suffer from it. That's why they talk about it and we've seen it before problems with telecommunications satellites and, in extreme cases, with electrical networks.

Solar storm classified as G2

These winds have been classified as a moderate G2 solar storm - storms are classified as G1 at the bottom of the scale to G5 which is a powerful solar storm.

According to space meteorology, G2 storms can affect high-latitude energy systems and could impact spacecraft orbit forecasts.

In fact, it is already becoming a routine. This is due to the fact that this year there are especially many such events. However, as mentioned above, these 11 years of the 25th solar cycle will not be peaceful.

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Scorpion: New Belfast Evo and Evo Carbon Retro Helmets



Korean helmet manufacturer Scorpion is best known for its sporty modular touring and aggressive style urban helmets. But the brand also has a vintage helmet that has been on the market for half a dozen years: the Belfast Jet.

This year, Scorpion decided to update its line of equipment with new retro helmets Belfast Evo and Belfast Evo Carbon.

In appearance, the Evo versions are of course very close to the previous versions, as it is a round pendant in a very classic style. But inside the Ultra-TCT fiberglass shell, things have changed as the helmet now complies with the ECE R22-06 standard.

The Belfast Evo features a hypoallergenic, removable and washable Kwikwick 2 liner, Kwikfit goggle slits, hand-stitched faux leather lining and a chin strap with micrometric buckle. There’s also a Speedview anti-fog sunscreen. The set is very light, about 1100 grams according to the manufacturer.

The Evo Carbon variant features an even lighter weight of 950 grams and the use of Kiwkwick 3 interior trim. Its price is also significantly higher.

Scorpion is offering its Belfast Evo jet from €169.90 in a single seat version and a carbon version starting at €299.90.

Selling points: JC Motos, Caparicapeles, AdvSpirit, Motovest

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Samsung plans to release a tablet with a folding screen



Samsung plans to release a tablet with a folding screen

BUT Samsung has already made it clear that it intends to continue betting on foldable phones, which will include the company’s new Galaxy Z Fold 4 and Galaxy Z Flip 4 models this week.

Apart from wanting to contribute to the foldable mobile phone category, a South Korean tech company is also known to be developing a foldable screen tablet. Who says this is the Ice Universe page on the Chinese social network Weibo (via Android Headers), referring to the fact that the tablet in question will be called the Galaxy Tab Fold.

The page in question suggests that the Galaxy Tab Fold will be announced at the same Galaxy Tab S9 launch event that Samsung usually holds in the first quarter of the year.

It is possible that the presentation of these two tablets will take place in early 2023, but given that we had to wait two years between the Galaxy S7 (2020) and Galaxy S8 (2022), there is also a possibility that the Galaxy Tab Fold and Galaxy Tab S9 will appear only in 2024.

Read also: Release date, price and colors of Samsung cordless phones

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