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

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3 years ago

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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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At a birthday party, Sidharth Malhotra and Kiara Advani draw attention with stunning outfits.

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4 weeks ago

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January 28, 2025

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At a birthday party, Sidharth Malhotra and Kiara Advani draw attention with stunning outfits.

Last night in Mumbai, all the prominent figures from Bollywood attended producer Ashvini Yardi’s birthday celebration. The celebration was attended by a number of celebrities, including Salman Khan, Akshay Kumar, Sonakshi Sinha, Kartik Aaryan, Ekta Kapoor.

Riteish Deshmukh, and Genelia D’Souza, in addition to the rumoured coupling of Sidharth Malhotra and Kiara Advani. Sidharth and Kiara smiled for photographers outside the venue while wearing fashionable outfits.

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Sidharth Malhotra and Kiara Advani turned heads at a star-studded birthday party with their impeccable fashion choices and undeniable chemistry. The Bollywood power couple, known for their on-screen and off-screen charisma, made a stylish appearance that left fans and photographers.

The two actors frequently spend out together, and this party was one of those times even if they haven’t totally embraced their connection. Scroll down to see their outfits for the affair. Meanwhile, Sidharth Malhotra and Kiara Advani have confessed their relationship while appearing in several episodes of Koffee With Karan season.

Celebrities flocked to Mumbai on Monday to celebrate Ashvini Yardi’s birthday with a star-studded party. In the same car, Sidharth Malhotra and Kiara Advani also made their way to the celebration and posed for photos with photographers outside the venue. Sidharth complemented Kiara’s star-studded.

event attire of a halter crop top and shimmering skirt by wearing jogging trousers and a casual denim tee. Particularly chic was Kiara’s attire for the event, which we adored. On social media, numerous paparazzi accounts posted videos of the two celebrities. Speaking of Kiara’s glitzy attire, the Shershah actor wore a fashionable crop top with a butterfly design. The white blouse has a figure-hugging fit, an asymmetrical hem, a bare-back design with ties on the back, and a halter-style plunging V neckline.

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Kiara paired it with a golden-colored shimmering skirt with a flowy style, wide high-rise waistline, and pleated accents at the ankle-length hem. She accessorised the look with bold rings, yellow box-shaped hoops, and black strappy high heels. Open hair with a centre part, a neutral lip colour, and dewy makeup completed the look.

Sidharth, on the other hand, posed with Kiara while wearing an acid-washed denim collared shirt with full-length sleeves that were folded in and front patch pockets. His outfit for the occasion included a chic watch, grey baggy pants, high-top white lace-up sneakers, a centre-parted hairstyle, and a clean-shaven face.

Meanwhile, Sidharth Malhotra and Kiara Advani have sort of confessed their relationship while appearing in several episodes of Koffee With Karan season 7. In the 2021 movie Shershaah, the two celebrities were spotted together.

Riteish Deshmukh, and Genelia D’Souza, in addition to the rumoured coupling of Sidharth Malhotra and Kiara Advani. Sidharth and Kiara Sidharth, on the other hand, posed with Kiara while wearing an acid-washed denim collared shirt with full-length sleeves that were folded in and front patch pockets.

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His outfit for the occasion included a chic watch, grey baggy pants, high-top white lace-up sneakers, a centre-parted hairstyle, and a clean-shaven face. smiled for photographers outside the venue while wearing fashionable outfits. The two actors frequently spend out together, and this party was one of those times even if they haven’t totally embraced their connection. Scroll down to see their outfits for the affair.

Sidharth Malhotra and Kiara Advani turned heads at a star-studded birthday party with their impeccable fashion choices and undeniable chemistry. The Bollywood power couple, known for their on-screen and off-screen charisma, made a stylish appearance that left fans and photographers in.

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