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
January 1,2020

New Delhi, Jan 1: The new Army chief Lieutenant General MM Naravane on Wednesday said that India needs to pay more attention to its border along China and asserted that the force is capable of dealing with any security challenge.

"We have been giving attention to our western front in the past. The northern front now also requires an equal amount of attention... The Army is capable of tackling any dangers to the country," General Naravane told reporters after receiving the first Guard of Honour as the Army chief.

"In that context, we are now going in for capability development and enhancement of our capacities even in our northern borders which includes the northeastern part of our country," he said.

On the border dispute with China, the Army chief said that continuing peace along the border will pave the way for a solution.

He said: "We have been able to maintain peace and tranquility along borders and I'm sure that situation will prevail. By maintaining this, we will be able to set the stage for the eventual solution."

General Naravane said that operational readiness and modernisation will be among the top priorities of the Army under his leadership.

"Our priority will be to be ready to meet any challenge and to be operationally prepared at all times. This will happen as a result of modernisation. We will continue to build our capability especially in the North and Northeast region of our country," he said.

He said that the Indian Army will pay special attention to respect human rights. "We will also pay special emphasis on raising security awareness among ranks and file and pay special attention to respect human rights," the Army chief said.

Assuring the country on security, he said, "All three services — the Army, the Navy and the Air Force — are ready to defend the country."

He extended wishes to people in the new year and hoped that the country will make huge progress in this decade.

General Naravane took over as the 28th Chief of the Army Staff (COAS) on Tuesday, succeeding General Bipin Rawat who has become India's first Chief of Defence Staff (CDS).

General Naravane was previously the Vice Chief of Army Staff.

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News Network
July 27,2020

Chengdu, China, Jul 27: The American flag was lowered at the United States consulate in Chengdu on Monday, days after Beijing ordered it to close in retaliation for the shuttering of the Chinese consulate in Houston.

Footage on state broadcaster CCTV from outside the consulate showed the flag being slowly lowered early Monday morning, after diplomatic tensions soared between the two powers with both alleging the other had endangered national security.

Relations deteriorated in recent weeks in a Cold War-style standoff, with the Chengdu mission Friday ordered to shut in retaliation for the forced closure of Beijing's consulate in Houston, Texas.

The deadline for the Americans to exit Chengdu has been unclear, but the Chinese consulate in Houston was given 72 hours to close after the original order was made.

On Saturday news agency reporters saw workers removing the US insignia from the front of the consulate.

Over the weekend, removals trucks entered the US consulate and cleaners were seen carting large black rubbish bags from the building.

Beijing says closing the Chengdu consulate was a "legitimate and necessary response to the unreasonable measures by the United States", and has alleged that staff at the diplomatic mission endangered China's security and interests.

Washington officials, meanwhile, said there had been unacceptable efforts by the Chinese consulate in Houston to steal US corporate secrets.

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Agencies
January 4,2020

Stockholm, Jan 4: “I’m not the kind of person who celebrates birthdays,” Greta Thunberg said as she turned 17 on Friday, marking the occasion in inimitable style - with a seven-hour hour protest outside the Swedish parliament.

The climate activist braved winter conditions in her native Stockholm to continue the weekly Friday School Strike for the Climate campaign that helped catapult her to international fame.

“I stand here striking from 8am until 3pm as usual ... then I’ll go home,” Thunberg, Time magazine’s Person of the Year for 2019, told Reuters.

“I won’t have a birthday cake but we’ll have a dinner.”

It’s been a busy 12 months for Thunberg, who crisscrossed the globe by car, train and boat - but not plane - to demand action on climate change.

“It has been a strange and busy year, but also a great one because I have found something I want to do with my life and what I am doing is having an impact,” she said.

When she was 15, Thunberg began skipping school on Fridays to demonstrate outside the Swedish parliament to push her government to curb carbon emissions. Her campaign gave rise to a grassroots movement that has gone global, inspiring millions of people to take action.

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