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
January 3,2020

Dhaka, Jan 3: Bangladesh's paramilitary force chief said on Thursday that a total of 445 Bangladeshi nationals returned from India in last two months following the publication of the National Register of Citizens (NRC) by the Indian government.

Border Guard Bangladesh (BGB) Director General Maj Gen Md Shafeenul Islam disclosed the figure during a press briefing here.

"About 1,000 people were arrested in 2019 for illegal border crossings from India to Bangladesh, with 445 of them returning home in November and December," he said.

After verifying their identities through local representatives, BGB came to know that all the intruders are Bangladeshis, Islam said, adding that 253 cases were lodged against them for illegal trespass, while initial investigations found that at least three of them were human traffickers.

The BGB Director said the trespassing did not create any tension between the border forces of Bangladesh and India.

Last week, Islam visited India where he said that the creation of the NRC is completely an "internal affair" of India and the cooperation between the border guarding forces of the two countries is very good.

He said the BGB will continue to do its work of preventing illegal border crossings as per its mandate.

A BGB delegation, led by Islam, was on a bilateral visit to India to hold DG-level border talks with its counterparts, the Border Security Force (BSF).

The talks took place from December 26-29, during which a host of issues related to cross-border smuggling and activities of criminals and others along the 4,096-km-long front were discussed.

Responding to a question, Islam said, "No discussion was held at the conference over the (NRC) issue".

He said during the five-day talks held in New Delhi, the BGB demanded that the BSF should take effective steps to prevent killings of Bangladeshis on frontiers as casualty figures sharply rose in 2019.

"The number of border killings in 2019 was highest in the last four years. As per our calculation, the number of such unexpected deaths was 35," the BGB chief said.

However, the BSF estimate of the casualty figure is much lower than our calculation, he said.

Islam said the BSF is following the policy of maintaining maximum restraint and minimal use of force even after being attacked by "armed border offenders".

A statement issued by the BSF last month in New Delhi after the conclusion of the DG-level talks said, "On the concern of the BGB regarding the death of Bangladeshi nationals on borders, it was informed to them that a non-lethal weapon policy is strictly followed by BSF personnel on borders.

"Firing is resorted to only in self-defence, when BSF patrols are gheraoed and attacked by ‘dah’ (a sharp-edged weapon) etc. It was specified that the BSF does not discriminate between criminals based on nationality," it said.

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News Network
January 14,2020

New Delhi, Jan 14: One of the four Nirbhaya gang rape convicts, who are scheduled to be hanged on January 22, moved a mercy plea before President Ram Nath Kovind to set aside the death sentence issued against him.

He also moved the Delhi High Court to set aside the death warrant issued by a trial court. This hearing is scheduled for Wednesday before a bench of Justices Manmohan and Sangita Dhingra Sehgal.

The petition, filed through advocate Vrinda Grover, seeks setting aside of the January 7 order issuing the warrant of his execution.

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News Network
January 7,2020

Mumbai, Jan 7: Facing criticism from social media and political quarters for holding a 'Free Kashmir' poster during a protest against violence at Jawaharlal Nehru University (JNU), Mehak Prabhu, a Mumbai-based storyteller, on Tuesday clarified that she meant to highlight the restrictions imposed in Jammu and Kashmir and wishes to see peace in the region, adding she had no other motive behind her actions.

"At around 7 pm yesterday, I reached where the protest was happening at the Gateway of India. Like anybody else who believes in democracy, I also joined that protest. We were standing for justice to the JNU students," Prabhu said in a video posted on Facebook.

"I saw a bunch of people who were painting placards on every issue like NRC, CAA and for JNU students. There was a placard lying on the side which said 'Free Kashmir'. The first thing which came to my mind when I saw that placard was about the basic constitutional rights of Kashmiris," she said.

Prabhu also said that she was not a Kashmiri and was brought up in Mumbai. She outlined that she was standing with a flower in her hand and asserted that the entire matter was "completely blown out of proportion".

"I was quietly standing with a flower in my hand. This means we need to make peace together. That was my only intention in holding that placard. The narrative that has been put out is absolutely wrong," she said, describing the reactions to the matter was "crazy".

The Mumbai-based storyteller underlined that the incident is scary and urged the people to spread the words of what she said and not hatred.

"The way it has gone, it is very scary. I am a simple person. As a woman, it is very scary for my safety right now. Spread this side of my story and let's stop it here. Let us not spread the hate. It has happened to me, it can happen to anyone. We should not live in fear," Prabhu further said.

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