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
May 30,2020

Coronavirus lockdown in India has been extended till June 30 with more relaxations.

While the lockdown has been extended in containment zones, relaxations outside containment zones include reopening of religious places for public  from June 8. 

Hotels, restaurants and shopping malls also to open from June 8. Decision on opening educational institutions to be taken in July.
 

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News Network
July 3,2020

New Delhi, Jul 3: India reported the highest ever single-day spike of 20,903 COVID-19 cases in 24 hours on Friday, said the Union Ministry of Health and Family Welfare.

With these new cases, India's coronavirus tally has risen to 6,25,544 cases of which 2,27,439 patients are active cases while 3,79,892 patients have been cured/discharged/migrated.

379 more deaths due to COVID-19 were reported in the country in the last 24 hours, taking the number of deaths due to the infection to 18,213.

As per the Health Ministry, Maharashtra -- the worst-affected state from the virus -- has a total of 1,86,626 cases including 8,178 fatalities while Tamil Nadu has 98,392 coronavirus cases in the state inclusive of 1,321 fatalities.

Delhi has reported 92,175 cases so far inclusive of 2,864 patients succumbing to the virus.

The Indian Council of Medical Research on Friday said that the total number of samples tested till July 2 is 92,97,749 of which 2,41,576 samples were tested on Thursday.

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Agencies
February 23,2020

New Delhi, Feb 23: Hailing the role of first Prime Minister Jawaharlal Nehru in shaping India a modern nation state, former Prime Minister Manmohan Singh on Saturday hit out at the Narendra Modi-led Central government, saying "nationalism" and the slogan of 'Bharat Mata Ki Jai' are being misused to construct a militant and purely emotional idea of India.

Speaking at the launch of a book on Jawaharlal Nehru's works and speeches, Singh said: "I am extremely happy that this book makes an effort to revisit Pandit Nehru. He had led this country in its volatile, formative days when we adopted democratic way of life, accommodating divergent social and political views."

The former Prime Minister said that Nehru, who was very proud of Indian heritage, "assimilated it", and harmonised them into the needs of a "new modern" India.

"A great visionary, Nehruji laid the foundation for shaping India as a modern nation state," he said.

Highlighting the works of the first Prime Minister, Singh said: "If India is recognized in the comity of nations as a vibrant democracy and, if it is considered as one of the important world powers, it was Nehru, who should be recognised as its main architect."

He said Nehru was not only a statesman of high international standing, but a great historian and literary figure too.

"With an inimitable style, and a multi-linguist, Nehru laid the foundation of the universities, academies and cultural institutions of Modern India. But for Nehru's leadership, Independent India would not have become what it is today," he said.

Taking an apparent dig at the BJP government, he said: "But unfortunately, a section of people who either do not have the patience to read history or would like to be deliberately guided by their prejudices, try their best to picture Nehru in a false light.

"But I am sure, history has a capacity to reject fake and false insinuations and put everything in proper perspective," he said.

He said the book "Who is Bharat Mata" is such an attempt to set the narrative in the right direction.

Singh said that selecting appropriate pieces from Nehruji's works, the book justifies its title "Who is Bharat Mata?"

"As this book contains a timely collection of writings by and on Pandit Jawaharlal Nehru- the leader, who shaped India and the Icon whose legacy is the subject of intense and often angry reaction today.

The book also comprises reminiscences and assessments of Nehru by some of his contemporaries and near contemporaries-among them, including Mahatma Gandhi, Bhagat Singh, Sardar Patel, Maulana Azad, Aruna Asaf Ali, Sheikh Abdullah, Ramdhari Singh Dinkar, Ali Sardar Jafri, Baldev Singh, Martin Luther King Jr, Richard Attenborough, Lee Kuan Yew and Atal Bihari Vajpayee.

"It is a book of particular relevance at a time when nationalism and the slogan of ‘Bharat Mata Ki Jai' are being misused to construct a militant and purely emotional idea of India that excludes millions of residents and citizens," Singh said attacking the BJP government.

The two time Prime Minister further said that in the pages of the carefully complied anthology-which also carries illuminating introductions by the authors Nehru emerges as a "remarkable man of ideas and action", who had an instinctive understanding of India's civilisational spirit and as a visionary with clear commitment to the promotion of scientific temper, who despite the compulsions of politics, remained a true democrat.

"His legacy continues to be of immense significance-perhaps more today than at any other time in our history," he said.

He also warned that "Nehru makes a very significant and time relevant remark on the dangers of leaderships falling into a trap and getting removed far away from the common people whom they are supposed to serve".

"In an atmosphere, when emotions are deliberately get provoked and the gullible are misled by false propaganda, misusing communication technology, this book makes a refreshing break through," Singh added.

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