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
February 3,2020

New Delhi, Feb 3: In the third such incident inside of a week, two unidentified persons opened fire outside Gate No. 5 of Jamia Millia Islamia on Sunday night, the Jamia Coordination Committee (JCC) said.

A statement issued by the committee, a group comprising students and alumni of the university formed to protest against the Citizenship Amendment Act, said the attackers were on a red Rcooty.

No one was injured in the attack. One of the miscreants was wearing a red jacket, the statement said.

"Firing has taken place at Gate No.5 of Jamia Millia Islamia right now by two unidentified persons. As per report, one of them was wearing a red jacket and driving a red Scooty having vehicle no. 1532 or 1534," the statement said.

Police said they were verifying the JCC's claims.

Asim Mohammed Khan, former Congress MLA from Okhla, said the incident occurred around 11.30 pm. "We heard the gunshot. That is when we stepped out to see and the two men left on a Scooty," a student said.

"We have taken down the vehicle number and called police," he added.

This is the third firing incident in the Jamia Nagar area in a week.

On Thursday, a minor fired at anti-CAA protesters marching towards Rajghat, injuring a student.

Two days later, a 25-year-old fired two rounds in air in Shaheen Bagh in Jamia Nagar. No one was hurt in the incident.

The incident on Sunday night triggered panic in the area. A police vehicle had reached the spot after the incident but was chased away by angry students.

Hundreds of students and locals gathered outside the university.

Many raised slogans against the Delhi Police. They also staged a dharna outside the Jamia Nagar police station.

Shezad Ahmed, a JMI student and resident of Zakir Nagar, said they were not even allowed to protest peacefully.

"We are not going to be deterred by such incidents. We will continue with our protest," he added.

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News Network
July 27,2020

New Delhi, Jul 27: India's COVID tally on Monday crossed 14 lakh mark with the highest single-day spike of 49,931 cases reported in the last 24 hours, said the Union Ministry of Health and Family Welfare.

The total COVID-19 cases stand at 14,35,453, including 4,85,114 active cases, 9,17,568 cured/discharged/migrated, it added.

With 708 deaths in the last 24 hours, the cumulative toll reached 32,771.

India had crossed 13 lakhs COVID-19 cases on July 25.

Maharashtra has reported 3,75,799 coronavirus cases, the highest among states and Union Territories in the country.

A total of 2,13,723 cases have been reported from Tamil Nadu till now, while Delhi has recorded a total of 1,30,606 coronavirus cases.

According to the Indian Council of Medical Research (ICMR), 5,15,472 samples were tested for coronavirus on Sunday and overall 1,68,06,803 samples have been tested so far.

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News Network
March 7,2020

New Delhi, Mar 7: No country in the world says everybody is welcome, External Affairs Minister S Jaishankar said on Saturday, hitting out at those criticising India over the Citizenship (Amendment) Act.

Jaishankar criticised the United Nations Human Rights Council (UNHRC) for its criticism on the situation in Jammu and Kashmir, saying its director had been wrong previously too and one should look at the UN body's past record on handling the Kashmir issue.

"We have tried to reduce the number of stateless people through this legislation. That should be appreciated," he said when asked about the CAA at the ET Global Business Summit. "We have done it in a way that we do not create a bigger problem for ourselves."

"Everybody, when they look at citizenship, have a context and has a criterion. Show me a country in the world which says everybody in the world is welcome. Nobody says that," the minister said.

The external affairs minister said moving out of the Regional Comprehensive Economic Partnership (RCEP) was in the interest of India's business.

Asked about the UNHRC director not agreeing with India on the Kashmir issue, Jaishankar said: "UNHRC director has been wrong before.

"UNHRC skirts around cross-border terrorism as if it has nothing to do with country next door. Please understand where they are coming from; look at UNHRC's record how they handled Kashmir issue in past," he added.

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