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

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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News Network
July 14,2020

Brasilia, Jul 14: Brazil has reported new 20,286 coronavirus cases in last 24 hours taking the country's total to 1.8 million, Sputnik reported citing the health ministry.

The country's death toll has increased by 733 in the same period of time. The death toll from the infection has touched 72,833.

Over 1.1 million people have recovered from COVID-19 in Brazil since the start of the epidemic in the country, according to the health ministry.

Brazil has the second-highest coronavirus death toll, it is surpassed only by the United States.

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Agencies
February 11,2020

New Delhi, Feb 11 Congress's performance touched a record low in the Delhi Assembly election as the party bagged less than 5 per cent of the total votes polled and 63 of its candidates lost their deposits.

The party, which ruled Delhi for 15 years on the trot under former Chief Minister Sheila Dikshit, failed to open its account for the second consecutive assembly election in Delhi.

Only three of its candidates Arvinder Singh Lovely from Gandhi Nagar, Devender Yadav from Badli and Abhishek Dutt from Kasturba Nagar managed to save their deposits.

Security deposit of a candidate is forfeited if he/she fails to secure one-sixth of the total valid votes cast in a constituency.

Most of Congress candidates got less than 5 per cent of the total votes polled in their respective constituencies.

Delhi Congress chief Shubhash Chopra's daughter Shivani Chopra, who was the party candidate from Kalkaji, also could not save her deposit.

Former Delhi Assembly Speaker Yoganand Shastri's daughter Priyanka Singh also forfeited her deposit.

The party's campaign committee chairman Kirti Azad's wife, Poonam Azad, lost badly and stood fourth, polling only 2,604 (2.23) votes.

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