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Astronomers Discover Largest Radio Galaxy ‘Alcyoneus’ That Spreads Over 16.3 Million Light Years

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Astronomers Discover Largest Radio Galaxy ‘Alcyoneus’ That Spreads Over 16.3 Million Light Years

Alcyoneus is a massive radio galaxy lurking some 3 billion light-years from us, reaching a distance of 5 megaparsecs into space. This is 16.3 million light-years long and represents the largest known structure of galactic origin.

The finding highlights our lack of understanding of these behemoths and what’s driving their phenomenal growth. But it could provide a route to a better understanding, not just for massive radio galaxies, but also for the intergalactic medium drifting through the open spaces.

Giant radio galaxies are another mystery in a universe full of enigmas. They consist of a host galaxy (a cluster of stars orbiting the core of a galaxy containing a supermassive black hole) and huge jets and lobes ejected from the galaxy’s center.

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These jets and lobes interact with the interstellar medium, acting as synchrotrons to accelerate electrons that produce radio emissions.

We’re pretty sure we know what’s causing the jet: an active supermassive black hole at the center of our galaxy. We call a black hole “active” when it devours (or “accretions”) matter from the huge surrounding disk of matter.

Not all the matter in the accretion disk swirling into the active black hole will necessarily go beyond the event horizon. A small portion of it is somehow directed from inside the accretion disk to the poles, where it is ejected into space at a large fraction of the speed of light in the form of jets of ionized plasma.

These jets can travel great distances and then spread out into huge radio lobes.

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This process is normal. Even the Milky Way has radio waves. What we really don’t understand is why they grow to absolutely massive megaparsec sizes in some galaxies. Known as giant radio galaxies, the most extreme examples may hold the key to understanding what drives their growth.

“If certain features of host galaxies are important for the growth of giant radio galaxies, then the hosts of the largest giant radio galaxies may also have them,” said the researchers, led by astronomer Martijn Oei of the Leiden Observatory in the Netherlands, in their prediction. Explanation in print – Papers accepted for publication in Astronomy and Astrophysics.

“If there are certain large-scale environments that are very favorable for the growth of giant radio galaxies, then the largest giant radio galaxies are likely to exist there.”

The team looked for these outliers in data collected by the European Low Frequency Array (LOFAR), an interferometric network of around 20,000 radio antennas spread across 52 sites in Europe.

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They reprocessed the data through a new pipeline, removing compact radio power sources that could interfere with the detection of diffuse radio lobes and correcting optical distortions.

Complete News Source : Sciencealert

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Bollywood

Kareena Kapoor chuckles at Jeh’s antics while sharing pictures of Taimur during a skiing trip in Switzerland.

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Kareena Kapoor chuckles at Jeh’s antics while sharing pictures of Taimur during a skiing trip in Switzerland.

Kareena Kapoor is enjoying her vacation in Switzerland with her husband, Saif Ali Khan, sons Taimur and Jeh, sharing photos from their skiing session on Instagram. Taimur, dressed in a red and green outfit, stands outdoors wearing ski gear, captioned by Kareena with a red heart and laughing emojis and a star emoji.

Kareena and Saif Ali Khan surprised their sons with special gifts during Christmas, sharing a glimpse of her international celebrations on Instagram. Kareena and Saif, who worked together in LOC Kargil and Omkara, fell in love on the 2008 film Tashan. They have two sons, Tamir and Jeh, and two children.

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Kareena appeared in Rohit Shetty’s action film, Singham Again, alongside Ajay Devgn, Akshay Kumar, Ranveer Singh, Tiger Shroff, Deepika Padukone, Arjun Kapoor, and Jackie Shroff.

Kareena Kapoor, the Bollywood actress known for her charismatic presence both on and off the screen, recently shared a heartwarming glimpse into her family vacation with her sons Taimur and Jeh during their skiing trip to Switzerland. Kareena, who frequently delights her fans with pictures of her family, posted some adorable snapshots that captured her son Taimur’s fun-filled moments on the snowy slopes.

The pictures, which were shared on her social media, show Taimur happily skiing and enjoying his time in the picturesque Swiss Alps. Fans were quick to notice his growing sense of independence and adventure as he took on the slopes with enthusiasm. As the firstborn of Kareena and Saif Ali Khan, Taimur has often been in the public eye since his birth, and his fans love to keep up with his activities and milestones.

However, it wasn’t just Taimur who stole the spotlight in Kareena’s recent post. The actress also shared a few candid moments featuring her younger son, Jeh. In one of the photos, Jeh is seen playfully enjoying his time in the snow, and Kareena can be heard chuckling in the background at his antics.

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The playful interactions between mother and son were endearing, and Kareena’s affectionate laughter resonated with her followers, who were quick to comment on how sweet it was to see such a joyful family moment.

Kareena’s captions further added to the charm of the post, as she wrote about how skiing was not just an adventure for Taimur but also a bonding experience for the entire family. While Taimur was embracing the thrill of skiing,

Jeh was content with his little snow games, and Kareena couldn’t help but laugh at the amusing and often unpredictable nature of family vacations with young children. Her playful comments Taimur and Jeh away from the hustle andabout Jeh’s quirky behavior added a light-hearted touch to the post, making her followers feel connected to her and her family.

The scenic backdrop of Switzerland added an enchanting layer to the beautiful pictures. With snow-capped mountains and picturesque landscapes, the family seemed to be having the perfect winter getaway. Kareena, known for her love for travel, has often shared snippets of her vacations with her followers, and this trip to Switzerland was no different. Fans were overjoyed to see the Kapoor family creating new memories together.

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Beyond just a fun-filled family vacation, the skiing trip also highlighted Kareena’s bond with her children. As a busy actress who juggles her career and family life, Kareena has always emphasized the importance of spending quality time with her loved ones. This trip was no exception, as she used the opportunity to bond with Taimur and Jeh away from the hustle and bustle of their daily lives.

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