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.

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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
July 6,2020

New Delhi, Jul 6: India's COVID-19 tally neared the 7 lakh mark with 6,97,413 cases after 24,248 new cases were reported in the last 24 hours, said the Union Ministry of Health and Family Welfare.

As per the Health Ministry, there are 2,53,287 active cases in the country while 4,24,432 patients have been cured or discharged. While one patient has migrated.

425 new deaths were reported in the last 24 hours in the country due to COVID-19, taking the number of patients succumbing to the deadly virus to 19,693.

As per the Health Ministry, Maharashtra continues to be the most impacted state from the infection with 2,06,619 cases and 8,822 fatalities due to the virus. Tamil Nadu in second place has a total of 1,11,151 cases and 1,510 fatalities.

The national capital's COVID-19 cases are also nearing the 1-lakh mark with 99,444 coronavirus cases and 3,067 deaths.

The total number of samples tested up to July 5 is 99,69,662 of which 1,80,596 samples were tested yesterday, informed the Indian Council of Medical Research on Monday. 

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News Network
January 29,2020

Aurangabad, Jan 29: Accusing Prime Minister Narendra Modi and Union Home Minister Amit Shah of creating a conflict between Hindu and Muslim communities in the country, former JNU student leader Kanhaiya Kumar has said the Citizenship (Amendment) Act (CAA) was adding fuel to the fire.

He was speaking at a rally held on Tuesday at Pathri in Parbhani district of Maharashtra against the CAA and the National Register of Citizens (NRC). It was organised by NCP MLC Abdullah Durrani.

"Modi and Shah used to create conflicts between Hindus and Muslims during the Gujarat elections. Now they are adopting the same strategy in the country," Kumar alleged.

Citizens should keep the religious conflicts aside and question the present government about unemployment and the poor state of the economy, he said.

"Through the CAA, the government is adding fuel to the fire, which is already raging in the country," he alleged.

When anyone questions the government about the problems existing in the country, it in turn asks him about his citizenship, the former JNUSU leader alleged.

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News Network
March 19,2020

New Delhi, Mar 19: Hit hard by coronavirus, budget carrier IndiGo today announced that it will cut salaries of senior employees. IndiGo CEO Ronojoy Dutta, who will himself take a 25% cut in salary, said senior vice presidents and above are taking a 20% pay cut while vice presidents and cockpit crew are taking a 15% pay cut.

With precipitous drop in revenues, the very survival of airline industry is now at stake, Dutta said while announcing the pay cut. "We have to pay careful attention to our cash flow so that we do not run out of cash," Dutta said adding that he knew how hard it was for families to take a cut in "take-home pay".

"With a great deal of reluctance and a deep sense of regret, we are therefore instituting pay cuts for all employees, excluding Bands A and B, starting April 1, 2020," the chief executive officer said. Band A and B are the lowest brackets in salary class, where most of the employees are.

IndiGo's flight operations chief Ashim Mitra had written an email to pilots this morning saying that the economic environment has deteriorated significantly and no airline is insulated from this severe downturn.

"It has become a necessity to initiate some tough calls and we are working on a string of measures that will be shared and implemented over the next few days and weeks," Mitra said.

With countries sealing their borders partially or fully across the world due to the novel coronavirus pandemic, aviation sector has been hit extremely hard as most airlines globally have drastically curtailed their flight operations.

Another budget airline GoAir has already terminated contracts of expat pilots amid curtailed operations due to the coronavirus pandemic.

Citing "unprecedented" decline in air travel, the budget carrier announced it was suspending international operations and offering leave without pay programme to its staff on a rotational basis.

Government-owned Air India may also cut salary of employees by 5% amid its growing financial woes particularly in the wake of the coronavirus pandemic, which has nearly grounded its entire international operations. The reduction will be across the board, according to a PTI report.

The loss-making airline, which is in the process of a second attempt of privatization after failing to get a single buyer nearly two years ago, has already taken some steps such as reduced flying allowances to cabin crew besides withdrawing entertainment allowance to executive pilots, among others.

“Air India is considering a 5 per cent pay cut to its employees as it faces huge financial crisis due to the ongoing coronavirus outbreak, which has brought almost its entire international operations save the US, Canada and a few other markets, to the ground," a source told news agency.

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