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 3,2020

New Delhi, Jan 3: US aviation regulator Federal Aviation Administration on Thursday warned America's airlines and their pilots that there is risk involved in operating flights in Pakistan airspace due to "extremist or militant activity", according to an official document.

"Exercise caution during flight operations. There is a risk to US civil aviation operating in the territory and airspace of Pakistan due to extremist/militant activity," said the US Federal Aviation Administration (FAA) in a notice to airmen (NOTAM) dated December 30, 2019.

The NOTAM is applicable to all US-based airlines and US-based pilots.

The US regulator said in its NOTAM that there continues to be a risk to US civil aviation sector from attacks against airports and aircraft in Pakistan, particularly for aircraft on the ground and aircraft operating at low altitudes, including during the arrival and departure phases of flights.

"The ongoing presence of extremist/militant elements operating in Pakistan poses a continued risk to US civil aviation from small-arms fire, complex attacks against airports, indirect weapons fire, and anti-aircraft fire, any of which could occur with little or no warning," it said.

The FAA said that while, to date, there have been no reports of man-portable air defense systems or Manpads being used against the civil aviation sector in Pakistan, some extremist or terrorist groups operating there are suspected of having access to these Manpads.

"As a result, there is potential risk for extremists/militants to target civil aviation in Pakistan with Manpads," it said.

The regulator added that pilots or airlines must report safety or security incidents - which may happen in Pakistan - to the FAA.

Pakistan on July 16 last year opened its airspace for India after about five months of restrictions imposed in the wake of a standoff with New Delhi.

Following the Balakot airstrikes by the Indian Air Force, Pakistan had closed its airspace on February 26 last year.

Pakistan in October last year had denied India's request to allow Prime Minister Narendra Modi's VVIP flight to use its airspace for his visit to Saudi Arabia over the Jammu and Kashmir issue.

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News Network
March 19,2020

Rome, Mar 19: Italy on Wednesday reported 475 new deaths from the novel coronavirus, the highest one-day official toll of any nation since the first case was detected in China late last year.

The total number of deaths in Italy has reached 2,978, more than half of all the cases recorded outside China, while the number of infections stood at 35,713.

The previous record high of 368 deaths was also recorded in Italy, on Sunday. The nation of 60 million has now recorded 34.2 percent of all the deaths officially attributed to COVID-19 across the world.

With the death rate still climbing despite the Mediterranean country entering a second week under an effective lockdown, officials urged Italians to have faith and to stay strong.

"They main thing is, do not give up," Italian National Institute of Health chief Silvio Brusaferro said in a nationally televised press conference.

"It will take a few days before we see the benefits" of containment measures, said Brusaferro. "We must maintain these measures to see their effect, and above all to protect the most vulnerable."

Imposed nationally on March 12, the shutdown of most Italian businesses and a ban on public gatherings are due to expire on March 25.

But school closures and other measures, such as a ban fan attendance at sporting events, are due to run on until April 3.

A top government minister hinted Wednesday that the school closure would be extended well into next month, if not longer.

The rates within Italy itself remained stable, with two-thirds of the deaths -- 1,959 in all -- reported in the northern Lombardy region around Milan, the Italian financial and fashion capital.

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News Network
January 3,2020

Mumbai, Jan 3: The Shiv Sena on Friday targeted the Centre by questioning the "efficacy" of the 2016 surgical strike and said the perception that it would demoralise Pakistani terrorists remained an "illusion" as Indian soldiers continue to get killed in terror attacks in Kashmir.

Accusing the Modi government of boasting about how Pakistan was straightened out after the surgical strike, the Sena sought to know whether it has really happened.

It also observed that troubled borders were not good for the country's well-being.

The Sena's remarks come in the wake of the death of an Army soldier from Maharashtra, Naik Sandip Raghunath Sawant, who was killed during a counter-insurgency operation in Jammu and Kashmir on Wednesday.

"The New Year did not begin on a positive note in Kashmir. Our jawan from Satara, Sandip Sawant, attained martyrdom in Kashmir along with two other soldiers. In the last one month, seven to eight jawans from Maharashtra were killed in the line of duty. The Maha Vikas Aghadi government in Maharashtra is not responsible for this," the Sena said in an editorial in party mouthpiece 'Saamana'.

The party also questioned whether the situation in Kashmir has improved after the surgical strike and abrogation of Article 370 provisions.

The party, however, maintained that scrapping Article 370 was a good move.

India had conducted the surgical strike on September 29, 2016, across the Line of Control (LoC) as a response to a terrorist attack on an Indian Army base in Uri sector of Jammu and Kashmir earlier that month.

Without naming the Centre, the Sena alleged, "Circulating news that only the Pakistanis were getting killed in Kashmir will not change the reality as tricolour-draped bodies of Indian soldiers, like Sawant, are reaching their respective villages."

"There is a bloodshed along the Kashmir border and mounting anger among the families of martyred jawans. The perception that surgical strike will demoralise Pakistani terrorists has turned out to be an illusion. In fact, the (terror) attacks have increased," it added.

The Uddhav Thackeray-led party accused the ruling BJP of boasting about straightening out Pakistan after the surgical strike.

"But has Pakistan been really straightened out? Rather Pakistan has been indulging in ceasefire violations along the LoC every day," it added.

The Shiv Sena also questioned the government's claim that the situation in Kashmir was under control after the nullification of Article 370.

"It is good that Article 370 was scrapped. Before that, surgical strike was carried out in Pakistan. But has the situation in Kashmir improved? The terror attacks continue. It's only that there is a control in reporting (these incidents)," it said.

The Sena also alleged that there was no clarity as to what was transpiring in Kashmir after the scrapping of Article 370 and only the media reports of soldiers sacrificing their lives have been coming out from that state

In a veiled attack on the BJP, its erstwhile ally, the Sena, also accused it of exploiting the surgical strike for political gains.

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