Connect with us

Tech

Scaled “shadows” of two colliding supermassive black holes

Published

on

The process of merging supermassive black holes has a new way to measure the vacuum

Scientists have found a way to quantify the “shadows” of two colliding supermassive black holes, giving astronomers a potential new tool to measure black holes in distant galaxies and test alternative gravitational theories.

Three years ago, the world was shocked by the first image of a black hole. A black hole from nowhere, surrounded by a ring of fiery light. This iconic image[{” attribute=””>black hole at the center of galaxy Messier 87 came into focus thanks to the Event Horizon Telescope (EHT), a global network of synchronized radio dishes acting as one giant telescope.

Now, a pair of Columbia researchers have devised a potentially easier way of gazing into the abyss. Outlined in complementary research studies in Physical Review Letters and Physical Review D, their imaging technique could allow astronomers to study black holes smaller than M87’s, a monster with a mass of 6.5 billion suns, harbored in galaxies more distant than M87, which at 55 million light-years away, is still relatively close to our own Milky Way.


Simulation of gravitational lensing in a pair of supermassive compact black holes. Credit: Jordy Devalar

This technique has only two requirements. First, you need a pair of supermassive black holes in the middle of a merger. Secondly, you should be looking at the pair from a roughly lateral angle. From this side view, as one black hole passes in front of another, you should see a flash of bright light as the black hole’s bright ring is magnified by the black hole closest to you, a phenomenon known as gravitational lensing.

The lensing effect is well known, but what the researchers found here was a subtle sign: a characteristic dip in brightness corresponding to the “shadow” of a black hole in the background. This subtle dimming can last from hours to days, depending on the size of the black holes and the entanglement of their orbits. If you measure how long the fall lasts, the researchers say, you can estimate the size and shape of the shadow cast by a black hole’s event horizon, a cul-de-sac from which nothing, not even light, escapes.

In this simulation of a pair of merged supermassive black holes, the black hole closest to the observer approaches and therefore appears blue (Box 1), inflating the redshifted black hole from behind through a gravitational lens. As the nearby black hole amplifies the light from the distant black hole (Box 2), the observer sees a burst of bright light. But when a nearby black hole passes in front of the abyss or shadow of a more distant black hole, the observer sees a slight decrease in brightness (Table 3). This decrease in brightness (3) is clearly visible in the light curve data below the images. Credit: Jordy Devalar

“It took years and a huge effort on the part of dozens of scientists to make this high-resolution image of M87’s black holes,” said first study author Jordy Davilar, a postdoctoral fellow at Columbia and the Flatiron Center for Computational Astrophysics. “This approach only works with the closest and largest black holes – a couple at the core of M87 and possibly our own Milky Way.”

He added: “With our method, you measure the brightness of black holes over time, and you don’t have to spatially resolve each object. It should be possible to find this signal in many galaxies.”

The shadow of a black hole is its most mysterious and instructive feature. “This dark spot tells us about the size of the black hole, the shape of the space-time around it, and how matter gets into the black hole near its horizon,” said study co-author Zoltan Hyman, professor of physics at Columbia University.

Observing the merger of supermassive black holes

When a supermassive black hole merger is observed from the side, the black hole closest to the observer enlarges the distant black hole through a gravitational lens effect. The researchers found a small drop in brightness corresponding to the “shadow” of a distant black hole, allowing the observer to measure its size. Credit: Nicoletta Barolvini

The shadows of a black hole may hide the secret of the true nature of gravity, one of the fundamental forces of our universe. Einstein’s theory of gravity, known as general relativity, predicts the size of black holes. So physicists turned to them to test alternative theories of gravity, trying to reconcile two competing ideas about how nature works: Einstein’s general theory of relativity, which explains large-scale phenomena such as the rotation of the planets and the expanding universe, and quantum physics, which explains how nature works. small particles such as electrons and photons occupy several states at the same time.

Researchers interested in lighting up supermassive black holes master A suspicious pair of supermassive black holes at the center of a distant galaxy at the beginning of the universe.[{” attribute=””>NASA’s planet-hunting Kepler space telescope was scanning for the tiny dips in brightness corresponding to a planet passing in front of its host star. Instead, Kepler ended up detecting the flares of what Haiman and his colleagues claim are a pair of merging black holes.

They named the distant galaxy “Spikey” for the spikes in brightness triggered by its suspected black holes magnifying each other on each full rotation via the lensing effect. To learn more about the flare, Haiman built a model with his postdoc, Davelaar.

They were confused, however, when their simulated pair of black holes produced an unexpected, but periodic, dip in brightness each time one orbited in front of the other. At first, they thought it was a coding mistake. But further checking led them to trust the signal.

As they looked for a physical mechanism to explain it, they realized that each dip in brightness closely matched the time it took for the black hole closest to the viewer to pass in front of the shadow of the black hole in the back.

The researchers are currently looking for other telescope data to try and confirm the dip they saw in the Kepler data to verify that Spikey is, in fact, harboring a pair of merging black holes. If it all checks out, the technique could be applied to a handful of other suspected pairs of merging supermassive black holes among the 150 or so that have been spotted so far and are awaiting confirmation.

As more powerful telescopes come online in the coming years, other opportunities may arise. The Vera Rubin Observatory, set to open this year, has its sights on more than 100 million supermassive black holes. Further black hole scouting will be possible when NASA’s gravitational wave detector, LISA, is launched into space in 2030.

“Even if only a tiny fraction of these black hole binaries has the right conditions to measure our proposed effect, we could find many of these black hole dips,” Davelaar said.

References:

“Self-Lensing Flares from Black Hole Binaries: Observing Black Hole Shadows via Light Curve Tomography” by Jordy Davelaar and Zoltán Haiman, 9 May 2022, Physical Review Letters.
DOI: 10.1103/PhysRevLett.128.191101

“Self-lensing flares from black hole binaries: General-relativistic ray tracing of black hole binaries” by Jordy Davelaar and Zoltán Haiman, 9 May 2022, Physical Review D.
DOI: 10.1103/PhysRevD.105.103010

See also  Meteor temporarily turns night into day into RS
Continue Reading
Click to comment

Leave a Reply

Your email address will not be published. Required fields are marked *

Tech

The launch of the new device is causing “buzz” among users, with a possible price leaked through the website.

Published

on

Technology

The GSMArena website has leaked information that the starting price in India should be around 31,000 rupees.

Photo: Sanjeev Velmurugan/Getty Images for Nothing
Photo: Sanjeev Velmurugan/Getty Images for Nothing

It’s impossible to talk about great mobile phone brands without mentioning Apple, Samsung, Motorola e xiaomi. Not Brazilaccording to a number of studies, android prevails in several regions, as many devices with the system tend to be more popular and affordable. Other models such as LG e Nokiarun outside in the “race of giants”.

Still without much information or launch details Nothing Phone 1 creates huge expectations around the new device. Thousands of brand fans Nothing ready to invest a lot of money, especially in auctions. Web site ‘GSMArena’ leaked that the starting price should be around 31 thousand rupees No India (or 2064 reais in Brazil).

This value will be from 8 GB RAM e 128 GB storage. Model with 12 GB e 256 GBon the other hand, it can reach 36 thousand rupees (2397 reais). According to “Technical Radar”one hundred units Nothing Phone 1 were put up for auction before release. Some users even bid higher 3 thousand dollars (15,796 reais).

For those who don’t know Nothing is a new brand founded by the Swedish Carl Pei. Some rumors circulating on the internet indicate that the device will have AMOLED from 6.43 inches with permission FullHD+ and update frequency 90 Hzin addition to the main camera 50 MP and battery 4.500 mAh. He must also leave the factory running Android 12.

See also  New Skins From Brazilian Football Team Partnership Arrive Free Fire
Continue Reading

Tech

My summer holidays will get an English version

Published

on

My summer holidays will get an English version

Pencil Shin Chan

A photo: Goat Millennium

last year, A game called Crayon Shin Chan: Ura to Hakase no Natsuyasumi (Crayon Shin-chan: My summer vacation with a teacher). A mix of legendary manga Pencil Shin Chan And in the long run my summer holidays A series of video games, it felt slow, laid-back, relaxing and everything you could want from a game with a summer vacation focus.

Here is the trailer for the 2021 Japanese release:

Crayon Shin-chan “Ora and the Doctor Summer Vacation – Seven Day Journey – [Nintendo Direct 2021.2.18]

Looks nice, doesn’t it? Kazu Ayabe, director of the main series, was also in charge of this game, and the addition of more modern visuals – it was the first game for PS1 and the last for PSP – made everything even better. Like every other game in general my summer holidays Series We all assumed that this would be a Japan-only release, but it turned out that we were wrong at best.

An image from an article titled

A photo: Goat Millennium

Earlier today it was announced that it is not only Crayon Shin Chan: Ura to Hakase no Natsuyasumi It’s now out on PlayStation 4, but is also being translated into a number of Western languages, including English, German, Spanish, and Portuguese.

If you are wondering how these games work, then they are all about games during the summer holidays for children. You walk around a sleepy city, talking to people, playing a few games, and generally hanging out. As the game’s new English website says:

Enjoy the feeling of Japan in the height of summer. Walk under the open sky and listen to the sound of cicadas in the mountains and the gentle murmur of streams floating through the greenery. This is an experience that will instantly make you feel nostalgic for a Japanese summer.

international version Crayon Shin Chan: Ura to Hakase no Natsuyasumi It will release in August for PS4 and Nintendo Switch.

See also  Meteor temporarily turns night into day into RS
Continue Reading

Tech

Artificial intelligence helps Instagram check your age from your face

Published

on

Artificial intelligence helps Instagram check your age from your face

How old are you? Well, this question never leaves you, no matter how old you are. You feel happy answering until you reach an age that you don’t really want people to know about, and if you’re underage, social media platforms won’t be replaced by people. But this time, Instagram has prepared something different for everyone. Instagram is testing new age verification methods, including asking followers to verify their age and even using artificial intelligence (AI) to estimate your age through video selfies. It’s part of an effort to ensure users are at least 13 years old and “ensuring that teens and adults have the right experience for their age group,” he announced.

Currently, Instagram only asks users to verify their age when teens attempt to change their date of birth to show they are 18 or older. To verify their age, users can upload photos of various IDs, and starting today, users in the US will have two additional options: social proof and AI scoring.

Users in the US can also upload compatible ID photos to verify their age on Instagram. The company also uses another method called social proof. It involves three people aged 18 and over who are the user’s followers. They need to verify that user’s age if they receive a request from Instagram within three days.

Instagram also checks user posts after they are eligible for additional verification, such as if a person pretending to be 20 posts about celebrating their 16th birthday. It even tests a method based on a person’s written posts to see if they’re posting as a teenager or an adult, although we certainly see many adults on Instagram posting as if they were teenagers.

See also  Learn how to use Windows 11 protections right now in Windows 10
  • Top 10 Cryptocurrency Exchanges Amid Financial Crisis
  • NFT data space in Metaverse to give real assets an edge
  • Computer-generated art faces copyright issues
  • LaMDA is an ‘artificial intelligence baby’ who will soon surpass his father Google
  • Can synthetic data make a self-driving car safer?
  • Why do 95% of self-taught developers quickly change professions?
  • “My dead grandma used to read me a bedtime story” Alexa made it possible

The post “Artificial intelligence helps Instagram check age by face” first appeared on.

source – www.analyticsinsight.net

Continue Reading

Trending