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 1,2020

New Delhi, Jan 1: Newly-appointed Chief of the Defence Staff General Bipin Rawat on Wednesday said the armed forces stay away from politics and work as per the directives of the government of the day, remarks that come amid allegations that the forces were being politicised.

Gen Rawat also said that his focus as CDS will be to integrate the efforts of the three services and to work as a team.

"We keep ourselves away from politics. We act according to the directives of the government of the day," he said.

Gen Rawat said his focus will be to ensure best and optimal use of resources allocated to the three services.

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News Network
February 26,2020

New Delhi, Feb 26: Calling the recent violence in Delhi as 'planned conspiracy', Sonia Gandhi on Wednesday demanded Union Home Minister Amit Shah's resignation over the clashes that left 20 people dead in two days.

"CWC (Congress Working Committee) believes Home Minister and Centre is responsible. The Home Minister should tender his resignation with immediate effect," the Congress party's interim chief told reporters here.

Violent clashes erupted between pro and anti-CAA groups in parts of northeast Delhi on Monday, leading to widespread vandalism and arson for over two days.

While many blamed police for inaction to control the mobs, Union Home Minister Amit Shah met the top brass of Delhi Police, Chief Minister Arvind Kejriwal, LG Anil Baijal and directed the officials to control the situation.

Gandhi blamed both the Central and the Delhi governments, saying the administration did not take adequate steps on time to curb violence in the national capital.

"Chief Minister Arvind Kejriwal and Center is equally responsible for not activating the administration to reach out to the people to maintain peace and harmony," Sonia added.

The death toll in the violence rose to 20 on Wednesday, according to GTB hospital authorities.

Government sources told ANI that the National Security Advisor (NSA) Ajit Doval has been given the charge of bringing normalcy in the capital.

Sources also said that Doval will brief Prime Minister Narendra Modi and the Cabinet about the prevailing situation.

The NSA last night visited Jaffrabad, Seelampur and other parts of northeast Delhi where he held talks with leaders of different communities.

Without naming any leader, the Congress interim president also targeted the leaders of the Bharatiya Janata Party for making inflammatory statements saying that "there is a conspiracy behind the violence, country also saw this during Delhi elections. Many BJP leaders made inciting comments creating an atmosphere of fear and hatred."

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News Network
January 1,2020

Kolkata, Jan 1: US-based Bangladeshi author and playwright Sharbari Zohra Ahmed feels that the people of the country of her origin are more alike than different from Indians as they were originally Hindus.

But Bangladeshis now want to forget their Hindu roots, said the author, who was born in Dhaka and moved to the United States when she was just three weeks old.

Ahmed, who is the co-writer of the Season 1 of 'Quantico', a popular American television drama thriller series starring Priyanka Chopra, rues that her identity as a Bengali is getting lost in Bangladesh due to the influence of right-wing religious groups.

"How can Bangladesh deny its Hindu heritage? We were originally Hindus. Islam came later," Ahmed said while speaking to PTI here recently.

"The British exploited us, stole from us and murdered us," she said about undivided India, adding that the colonialists destroyed the thriving Muslin industry in Dhaka.

Ahmed said the question of her belief and identity in Bangladesh, where the state religion is Islam, has prompted her to write her debut novel 'Dust Under Her Feet'.

The British exploitation of India and the country's partition based on religion has also featured in her novel in a big way.

Ahmed calls Winston Churchill, the British prime minister during World War II, a "racist".

"He took the rice from Bengal to feed his soldiers and didn't care when he was told about that.

"During my research, I learnt that two million Bengalis died in the artificial famine that was created by him. When people praise Churchill, it is like praising Hitler to the Jews. He was horrible," she said.

The author said her novel is an effort to tell the readers what actually happened.

"Great Britain owes us three trillion dollars. You have to put in inflation. Yet, they (the British) still have a colonial mentality and white colonisation is on the rise again," Ahmed, who was in the city to promote her novel, said.

The novel is based in Kolkata, then Calcutta, during World War II when American soldiers were coming to the city in large numbers.

The irony was that while these American soldiers were nice to the locals, they used to segregate the so-called "black" soldiers, the novelist said.

"Calcutta was a cosmopolitan and the rest of the world needs to know how the city's people were exploited, its treasures looted, people divided and hatred instilled in them," she said.

"Kolkata was my choice of place for my debut novel since my mother was born here. She witnessed the 'Direct Action Day' when she was a kid and was traumatised. She saw how a Hindu was killed by Muslims near her home in Park Circus area (in the city)," Ahmed said.

Direct Action Day, also known as the Great Calcutta Killings, was a massive communal riot in the city on August 16, 1946 that continued for the next few days.

Thousands of people were killed in the violence that ultimately paved the way for the partition of India.

'Dust Under Her Feet' is set in the Calcutta of the 1940s and Ahmed in her novel examines the inequities wrought by racism and colonialism.

The story is of young and lovely Yasmine Khan, a doyenne of the nightclub scene in Calcutta.

When the US sets up a large army base in the city to fight the Japanese in Burma, Yasmine spots an opportunity.

The nightclub is where Yasmine builds a family of singers, dancers, waifs and strays.

Every night, the smoke-filled club swarms with soldiers eager to watch her girls dance and sing.

Yasmine meets American soldier Lt Edward Lafaver in the club and for all her cynicism, finds herself falling helplessly for a married man who she is sure will never choose her over his wife.

Outside, the city lives in constant fear of Japanese bombardment at night. An attack and a betrayal test Yasmine's strength and sense of control and her relationship with Edward.

Ahmed teaches creative writing in the MFA program in Manhattanville College and is artist-in-residence in Sacred Heart University's graduate film and television programme.

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abdullah
 - 
Wednesday, 1 Jan 2020

Is she trying to take over Shoorpanakhi Taslim Nasreen? 

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