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
May 20,2020

United Nations, May 20: Highlighting India's long-standing history of promoting inclusive and peaceful societies, a top UN official on Tuesday voiced concern over incidents of "increased hate speech and discrimination" against minority communities in the country following the adoption of the Citizenship Amendment Act.

Under-Secretary-General and UN Special Adviser on the Prevention of Genocide Adama Dieng, however, welcomed Prime Minister Narendra Modi’s call for unity and brotherhood in the wake of the COVID19 pandemic.

Dieng said in a note to the media on Tuesday that he is "concerned over reports of increased hate speech and discrimination against minority communities in India" since the adoption of the Citizenship Amendment Act (CAA) in December 2019.

The Indian government has maintained that the CAA is an internal matter of the country and stressed that the goal is to protect the oppressed minorities of neighbouring countries.

The CAA, which was notified on January 10, grants Indian citizenship to non-Muslim minorities migrated to India from Afghanistan, Pakistan and Bangladesh till December 31, 2014, following persecution over their faith.

"While the objective of the act, to provide protection to minority communities is commendable, it is concerning that this protection is not extended to all groups, including Muslims. This is contrary to India’s obligations under international human rights law, in particular on non-discrimination,” Dieng said.

The Special Adviser recognised "India’s long standing and well recognised history of promoting inclusive and peaceful societies, with respect for equality and principles of non-discrimination.”

He also welcomed recent statements by Prime Minister Modi that the COVID-19 pandemic “does not see race, religion, colour, caste, creed, language or border before striking and that our response and conduct...should attach primacy to unity and brotherhood.”

Dieng encouraged the Government of India to "continue to abide by this guidance by ensuring that national laws and policies follow international standards related to non-discrimination and to address and counter the rise of hate speech through messages of inclusion, respect for diversity and unity.”

He further reiterated that he would continue to follow developments and expressed his readiness to support initiatives to counter and address hate speech.

The hate speech and the dehumanisation of others goes against international human rights norms and values, he added.

“In these extraordinary times brought about by the COVID-19 crisis it is more important than ever that we stand united as one humanity, demonstrating unity and solidarity rather than division and hate,” he said.

Dieng also expressed concern over reports of violence during demonstrations against CAA in some regions of India.

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News Network
January 31,2020

New Delhi, Jan 31: Slamming the BJP over the Jamia firing incident, Congress leader Priyanka Gandhi Vadra on Friday said such incidents were possible with the ruling party's leaders inciting people to shoot, and asked Prime minister Narendra Modi to answer whether he stands with violence or non-violence.   

Her attack on the government comes a day after tensions in the Jamia area spiralled on Thursday after a man fired a pistol at a group of anti-CAA protesters, injuring a student, before walking away while waving the firearm above his head and shouting "Yeh lo aazadi" amid heavy police presence in the area.

"When the BJP government ministers and party leaders incite people to shoot, give provocative speeches, then all this becomes possible. The Prime Minister should answer what kind of a Delhi he wants to build?" Priyanka Gandhi said in a tweet in Hindi.

Does the PM stand with violence or non-violence, she asked.

"Does he stand with development or with anarchy?" the Congress general secretary said.

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Agencies
January 26,2020

New Delhi, Jan 26: Google on Sunday marked India's 71st Republic Day by dedicating a doodle illustrating the country's rich cultural heritage that permeates and unites the diverse nation.

From its world-famous landmarks like the Taj Mahal and India Gate, to the wide array of fauna such as its national bird (the Indian peafowl), to classical arts, textiles, and dances, the doodle, designed by Singapore-based artist Meroo Seth, brings together the rich cultural heritage of the country.

Republic Day marks the completion of India's transition towards becoming an independent republic after its constitution came into effect. The governing document had taken nearly three years of careful deliberation to finalise, and its eventual enactment was joyfully celebrated across the country.

While the Constitution was adopted by the Indian Constituent Assembly on 26 November 1949, it came into effect on January 26 -- a day when Declaration of Indian Independence (Purna Swaraj) was proclaimed by the Indian National Congress back in 1929, as opposed to the Dominion status offered by the British Regime.

Festivities embody the essence of diversity found in one of the world's most populous nations, celebrated over a three-day period with cultural events displaying national pride.

Last year's doodle on Republic Day, designed by artist Reshidev RK, had featured Rashtrapati Bhavan in the background along with a display of the country's iconic monuments and heritage.

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