Astronomers discover 83 supermassive black holes 13 billion light-years away

Agencies
March 15, 2019

Washington, Mar 15: Astronomers have discovered 83 quasars powered by supermassive black holes 13 billion light-years away from the Earth, from a time when the universe was less than 10 per cent of its present age.

“It is remarkable that such massive dense objects were able to form so soon after the Big Bang,” said Michael Strauss, a professor at Princeton University in the US.

“Understanding how black holes can form in the early universe, and just how common they are, is a challenge for our cosmological models,” Strauss said in a statement.

This finding, published in The Astrophysical Journal, increases the number of black holes known at that epoch  considerably, and reveals, for the first time, how common they are early in the universe’s history.

In addition, it provides new insight into the effect of black holes on the physical state of gas in the early universe in its first billion years.

Supermassive black holes, found at the centers of galaxies, can be millions or even billions of times more massive than the Sun.

While they are prevalent today, it is unclear when they first formed, and how many existed in the distant early universe.

A supermassive black hole becomes visible when gas accretes onto it, causing it to shine as a “quasar.” Previous studies have been sensitive only to the very rare, most luminous quasars, and thus the most massive black holes.

The new discoveries probe the population of fainter quasars, powered by black holes with masses comparable to most black holes seen in the present-day universe.

The team used data taken with “Hyper Suprime-Cam” (HSC) instrument, mounted on the Subaru Telescope of the National Astronomical Observatory of Japan, which is located on the summit of Maunakea in Hawaii.

The researchers selected distant quasar candidates from the sensitive HSC survey data.

They then carried out an intensive observational campaign to obtain spectra of those candidates, using three telescopes: the Subaru Telescope; the Gran Telescopio Canarias on the island of La Palma in the Canaries, Spain; and the Gemini South Telescope in Chile.

The survey revealed 83 previously unknown very distant quasars.

Comments

ABDUL AZIZ SHE…
 - 
Saturday, 16 Mar 2019

SUBHAANALLAH

 

 
ALLAH ALMIGHTY CREATED EVERTHING  INCLUDING WHOLE UNIVERSE AND WHAT IS IN IT,

HUMAN BEING CANNOT REACH TO UNDERSTAND IT,  HUMAN LIFE NOT SUFFEICENT TO REACH AND KNOW EVERYTHING.

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News Network
May 10,2024

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The Supreme Court Friday granted interim bail to Delhi Chief Minister Arvind Kejriwal till June 1 in the excise policy case.

The top court, however, stated that it will be passing a detailed order over the matter soon.

On Thursday, the Enforcement Directorate had opposed the move to grant interim bail to Kejriwal saying that “any special concession” to him will “amount to anathema to the rule of law and equality… thereby creating two separate classes in the country viz. ordinary people, who are bound by the rule of law as well as the laws of the country, and politicians who can seek exemption from the laws”.

The ED had arrested Kejriwal on March 21 in the excise policy case.

“The right to campaign for an election is neither a fundamental right nor a constitutional right and not even a legal right,” the ED said, maintaining that to its knowledge, “no political leader has been granted interim bail for campaigning even though he is not the contesting candidate”.

After the ED filed its affidavit, the AAP, in a press release, said, “The legal team of Delhi Chief Minister and AAP National Convenor, Shri Arvind Kejriwal, has raised strong objection to the affidavit filed by the Enforcement Directorate opposing interim bail in the Supreme Court.”

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News Network
May 12,2024

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Mangaluru: A native of Kerala was arrested on charge of misbehaving with crew on an Air India Express flight while travelling from Dubai to Mangaluru International Airport. The man even threatened to jump from the aircraft, according to officials. 

Siddartha Das, the security coordinator for Air India Express, lodged a complaint against the passenger, identified as Muhammad BC from Kannur, Kerala, after which he was caught by the airport security once the flight landed at Mangaluru. He was later handed over to the police.

DCP (Law and Order) Sidharth Goyal said the incident occurred on Flight IX814 on May 8.

When the flight was above the sea, Muhammad reportedly said he wanted to get off the plane, posing a threat to all on board. The unruly flyer was detained by airport security once the flight landed at Mangaluru International Airport and he was handed over to Bajpe police station officials.

Sources added once the flight took off from Dubai, the accused went to the lavatory and thereafter started inquiring with the cabin crew about a person named Krishna who was not on the flight. Muhammad kept on pressing the bell for in-flight assistance, even though the cabin crew members were near at hand. He then picked up a life jacket, gave it to a crew member, and said he wanted to use it upon landing.

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News Network
May 4,2024

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Mangaluru, May 4: A tragic incident unfurled last evening in Subrahmanya of Kadaba taluk in Dakshina Kananda, where a young gentleman, who had recently entered the bonds of matrimony a mere ten days hence, met his untimely demise due to a lightning strike.

As twilight descended, a tempestuous thunderstorm, accompanied by billowing rain clouds, cast its shadow over the locale.

Somasundar was diligently engaged in the task of piling up dried nuts in the yard to shield them from the impending deluge, when fate cruelly intervened, subjecting him to the fatal force of a lightning bolt.

Despite the expeditious efforts to convey him to Kadaba Community Hospital subsequent to his sudden indisposition, he tragically succumbed to his injuries. 

Somasundar, who operated a car washing enterprise in proximity to Subrahmanya, is mourned by his mother, sister, and wife.

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