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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Agencies
May 30,2020

New Delhi, May 30: The Congress on Friday described the first year of the Modi government as a "year of disappointment, disastrous management and diabolical pain".

Congress leader K C Venugopal said the six years of the Modi dispensation have seen fraying of bonds of empathy, fraternity and brotherhood with increase in acts of communal and sectarian violence.

Congress chief spokesperson Randeep Surjewala said that at the end of six years, it appears the Modi government is at war with its people and is inflicting wounds on them, instead of healing them.

"It is inflicting wounds on Mother India," he said.

"This government is trying to fill coffers of the select rich and is inflicting pain on the poor," Surjewala said.

On the BJP's charge of the Congress playing politics over the COVID-19 crisis, Venugopal said the opposition party did not indulge in any politics and gave suggestions instead.

"Being a responsible opposition, it is our duty to raise the problems faced by the common people. As opposition, we highlighted the failures of the government," he said.

Venugopal said the government "is totally insensitive" to the plight of migrant labourers and farmers.

Surjewala also demanded that a virtual session of Parliament be convened immediately to discuss pressing issues and the due process be set in motion for holding of meetings of various parliamentary committees.

Modi and his cabinet had taken oath on this day last year for a second term in office.

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News Network
May 20,2020

Washington, May 20: The United States recorded another 1,536 coronavirus deaths over the past 24 hours, the Johns Hopkins University tracker said.

That figure, tallied as of 8:30 pm (0030 GMT), raises to 91,845 the total number of COVID-19 deaths in the US.

The US tops the global rankings both for the highest death toll and the highest number of infections, with more than 1.5 million cases.

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News Network
June 18,2020

New Delhi, Jun 18: Prime Minister Narendra Modi on Thursday said he is "deeply grateful" for the overwhelming support shown by the global community for India''s membership of the UN Security Council.

India will work with all member countries to promote global peace, security, resilience and equity, he said.

India garnered 184 votes out of the 192 ballots cast in the General Assembly to win the election for the non-permanent seat in the powerful Security Council.

India''s two year term will begin on January 1, 2021.

This is the eighth time that India will sit at the UN high-table, which comprises five permanent members and 10 non-permanent members.

"Deeply grateful for the overwhelming support shown by the global community for India''s membership of the UN Security Council," the prime minister wrote on Twitter.

India will work with all member countries to promote global peace, security, resilience and equity, he said.

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