Aussie astronomers capture black hole eruption


Sydney, Dec 23 | Astronomers from Curtin University, as part of an international team, have produced the most comprehensive images of the nearest active black hole to earth.

The discovery, published in the Nature Astronomy journal and released to the public on Thursday, took a deep dive into the black hole at the center of the galaxy Centaurus A, about 12 million light-years away, reported Xinhua news agency.

Despite being galaxies far away, the erupting black hole extended across a length equal to 16 moons placed side by side in the night sky. However, it is not visible to the naked eye.

The images were created using the Murchison Widefield Array (MWA) telescope in outback Western Australia, which is able to detect and image emitted radio waves.

“These radio waves come from material being sucked into the supermassive black hole in the middle of the galaxy,” said lead author on the study Benjamin McKinley from the Curtin University node of the International Centre for Radio Astronomy Research (ICRAR).

As the black hole that possesses 55 million times the mass of the sun erupts, it feeds on gas and ejects material at near light speed, which causes “radio bubbles” to expand outwards.

“It forms a disc around the black hole, and as the matter gets ripped apart going close to the black hole, powerful jets form on either side of the disc, ejecting most of the material back out into space, to distances of probably more than a million light-years,” said McKinley.

McKinley said this is why the images appear brighter in the center, as energy is dissipated as particles are shot out and settle.

He said the shape it forms, two connected ovals, is likely the result of particles being re-accelerated by a strong magnetic field.

The research and imaging were made possible by the MWA which Curtin University operates on behalf of ICRAR.

“The MWA is a precursor for the Square Kilometre Array, a global initiative to build the world’s largest radio telescopes in Western Australia and South Africa,” said MWA director Steven Tingay.

Source: IANS

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Share Market Closing Bell: Nifty ends above 15,800, Sensex gains 180 pts

Share Market Closing Bell: Nifty ends above 15,800, Sensex gains 180 pts

The benchmark Indices Nifty started on the positive side after continuous sell off in last week and has managed to settle at 15842.30 with 60 point gain or 0.38 percent. However Nifty has failed to regain 16000 levels prior to LIC listing.

While Bank nifty has managed to settle at 33597.60 levels after gaining 1.44 percent. On the sectoral front, Nifty PSU Bank, Nifty Realty and Auto have contributed 2-3 percent gain on closing basis. On the flip side Nifty IT and FMCG ended with losses of 0.75 percent and 0.35 respectively. In Nifty, EICHERMOT, APOLLOHOSP and UPL were the top gainers while ULTRACEMCO, SHREECEM and ASIANPAINT were the prime laggards.

Technically, after forming the bearish candle on the weekly chart, the index has formed a Doji candlestick on the daily chart which shows indecisiveness among the trades. Moreover, the index has also faced a resistance from falling trend lines and showed profit booking from higher levels. However, Fibonacci retrenchment also has support around 15650 levels.

Traders may find buying opportunities for short term as if 15650 levels is protected. In the hourly chart, with support of the middle Bollinger band short term upside movement is expected. Stock specific action would drive the market in coming days too.

On the derivatives front, the highest call OI is at 16000 strike price followed by 16200 strike prices while on the put side, highest OI is at 15500 strike price. INDIA VIX closed at 24.53 with gain of 4.43 percent intraday indicating volatility is going to remain till weekly expiry . On the other hand, Bank nifty has support at 32600 levels while resistance is placed at 34500 levels.

Sumeet Bagadia
Executive Director
Choice Broking

Source: Choice India



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