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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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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Agencies
April 4,2020

Kozhikode, Apr 4: In a bid to maintain the lockdown amid COVID-19 outbreak, Police in Kozhikode is monitoring the situation using drone cameras and making sure that people are not breaking the law.

The police have so far arrested 41 persons who were out on a morning walk on Saturday during the lockdown in the backdrop of coronavirus outbreak.

The SHO of Town South Police Station informed that the accused were later released on bail.
At least 295 cases have been reported in the state so far.

Talking about COVID-19 testing, State Health Minister KK Shailaja told media: "Nine labs are conducting polymerase chain reaction (PCR) tests in Kerala. We've received 2000 rapid test kits and will start rapid tests from tomorrow. If a person tests positive in rapid test, we need to confirm it with PCR test."

The total number of COVID-19 positive cases in India climbed to 3072 on Saturday, according to Ministry of Health and Family Welfare.

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Agencies
May 26,2020

UN, May 26: Countries could see a "second peak" of coronavirus cases during the first wave of the pandemic if lockdown restrictions were lifted too soon, the World Health Organization (WHO) has warned.

Mike Ryan, the WHO's head of emergencies, told a briefing on Monday that the world was "right in the middle of the first wave", the BBC reported.

He said because the disease was "still on the way up", countries need to be aware that "the disease can jump up at any time".

"We cannot make assumptions that just because the disease is on the way down now that it's going to keep going down," Ryan said.

There would be a number of months to prepare for a second peak, he added.

The stark warning comes as countries around the world start to gradually ease lockdown restrictions, allowing shops to reopen and larger groups of people to gather.

Experts have said that without a vaccine to give people immunity, infections could increase again when social-distancing measures are relaxed.

Ryan said countries where cases are declining should be using this time to develop effective trace-and-test regimes to "ensure that we continue on a downwards trajectory and we don't have an immediate second peak".

Also on Monday, Tedros Adhanom Ghebreyesus, WHO Director-General, said that a clinical trial of hydroxychloroquine (HCQ) on COVID-19 patients has come to "a temporary pause", while the safety data of the the anti-malaria drug was being reviewed.

According to the WHO chief, The Lancet medical journal on May 22 had published an observational study on HCQ and chloroquine and its effects on COVID-19 patients that have been hospitalized, reports Xinhua news agency.

The authors of the study reported that among patients receiving the drug, when used alone or with a macrolide, they estimated a higher mortality rate.

"The Executive Group of the Solidarity Trial, representing 10 of the participating countries, met on Saturday (May 23) and has agreed to review a comprehensive analysis and critical appraisal of all evidence available globally," Tedros said in a virtual press conference.

The developments come as the total number of global COVID-19 cases has increased to 5,508,904, with 346,508 deaths, according to the Johns Hopkins University.

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