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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News Network
May 12,2020

Srinagar, May 12: Two paramilitary Central Reserve Police Force (CRPF) officers committed suicide after shooting themselves with their service rifles in Kashmir on Tuesday.

In the first incident, a CRPF sub-inspector on Tuesday committed suicide after shooting himself with his service rifle at Mattan area of south Kashmir’s Anantnag district. The deceased, identified as Fatah Singh of Jaisalmer in Rajasthan, had reportedly left behind a suicide note that read: “I am afraid, I may have Corona.”

Station House Officer (SHO) Akura, Mattan police station Jazib Ahmed said that they have followed the COVID-19 protocol while dealing with the body of the CRPF sub-inspector. “His samples have been taken and post-mortem conducted. Only results would confirm whether he was a COVID-19 positive,” he said.

CRPF spokesman in Srinagar Pankaj Singh said the officer had returned to his unit after performing a day-long duty. “As such, there is no evidence that he had caught COVID-19. Let’s wait for the final report. Details will be shared with the media,” Singh said.

Hours after the first incident, an assistant-sub-inspector of the CRPF posted in Srinagar also committed suicide by shooting himself dead with his service rifle.

Special Director General of CRPF, Zulfikar Hassan said they were trying to find out the reason for the two boys taking this extreme step.

Suicides and fratricide incidents are not uncommon among the CRPF and the Army personnel deployed in Kashmir. In 2006, recognising the rising fratricide and suicide cases among the armed forces, the then Defence Minister had constituted an expert group of psychiatrists under the Defence Institute of Psychological Research in order to suggest remedial measures to prevent suicide and fratricide incidents.

Over the last decade, incidents of fratricide have reportedly reduced in the Army as the force has taken measures to address the issue.

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News Network
February 18,2020

Ayodhya, Feb 18: A senior Supreme Court lawyer has written to the Ram temple trust on behalf of a group of Muslims in Ayodhya, asking that five acres of land around the demolished Babri Masjid where a graveyard is situated be spared for the sake of 'sanatan dharma'.

The letter, written by advocate M R Shamshad, is addressed to all 10 trustees of Shri Ram Janmabhoomi Teertha Kshetra.

Shamshad said according to Muslims, there is a graveyard known as 'Ganj Shahidan' around the demolished Babri Masjid where 75 Muslims who lost their lives in the 1885 riots in Ayodhya were buried.

"There is a mention of this in Faizabad Gazetteer also," he said.

"The central government has not considered the issue not using the grave-yard of Muslims for constructing the grand temple of Lord Ram. It has violated 'dharma'," the letter stated.

"In view of religious scriptures of 'sanatan dharma', you need to consider whether the temple of Lord Ram can have foundation on the graves of Muslims? This is a decision that the management of the trust has to take," it said.

"With all humility and respect to Lord Ram, I request you, not to use the land of about four to five acres in which the graves of Muslims are there around the demolished mosque," the letter added.

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News Network
February 1,2020

New Delhi, Feb 1: India on Friday banned the export of personal protection equipment such as masks and clothing amid a global coronavirus outbreak.

It did not give a reason for the ban but it reported its first case of the new coronavirus on Thursday, a woman in Kerala who was a student of Wuhan University in China.

The central Chinese city of Wuhan is the epicentre of the outbreak, and the virus has since spread to more than 9,800 people globally and killed 213 people in China.

Several Indian citizens living in Wuhan will arrive in India by plane on Saturday and be taken to a quarantine centre on the outskirts of the capital New Delhi.

India, the world’s second most heavily populated country after China, has taken measures to ensure that all people arriving from China report to health authorities.

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