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
June 6,2020

New Delhi, Jun 6: Military commanders of India and China are scheduled to meet today at Moldo on the Chinese side of the Line of Actual Control (LAC), to discuss the ongoing dispute along the LAC in Eastern Ladakh.

The Commander of the Leh-based 14 Corps of the Indian Army Commander Lieutenant Gen Harinder Singh will meet his Chinese equivalent Maj Gen Liu Lin, who is the commander of South Xinjiang Military Region of Chinese People's Liberation Army (PLA) to address the ongoing tussle in Eastern Ladakh between the two countries over the heavy military build-up by the People's Liberation Army along the LAC there.

The two sides have held close to a dozen rounds of talks since the first week of May when the Chinese sent over 5,000 troops to the LAC.

On Friday, officials of India and China interacted through video-conferencing with the two sides agreeing that they should handle "their differences through peaceful discussion" while respecting each other's sensitivities and concerns and not allowing them to become disputes in accordance with the guidance provided by the leadership.

In the last few days, there has not been any major movement of the People's Liberation Army troops at the multiple sites where it has stationed itself along the LAC opposite Indian forces.

India and China have been locked in a dispute over the heavy military build-up by the People's Liberation Army (PLA) where they have brought in more than 5,000 troops along with the Eastern Ladakh sector.

The Chinese Army's intent to carry out deeper incursions was checked by the Indian security forces by quick deployment. The Chinese have also brought in heavy vehicles with artillery guns and infantry combat vehicles in their rear positions close to the Indian territory.

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Agencies
January 4,2020

New Delhi, Jan 4: In more troubles for the former Finance Minister and senior Congress leader P Chidambaram, the Enforcement Directorate (ED) on Friday questioned him for over six hours in its probe into the Air India aircraft deal case, first time since his release from Tihar jail almost a month ago.

A senior ED official told IANS, "We questioned Chidambaram for over six hours today in the ongoing probe into the Air India deal with Airbus."

According to financial probe agency officials, Air India had planned to buy over 111 aircraft from Airbus and Boeing during the erstwhile United Progressive Alliance (UPA) government in 2009. This is the first time the ED has questioned the senior Congress leader in the Air India deal case.

The questioning of Chidambaram came for the first time since his release from the Tihar jail where he spent 106 days in connection with the INX Media money laundering case. He was released from Tihar on December 4 last year after he was granted bail by the Supreme Court. The former finance minister is also being investigated by the ED in a separate money-laundering cases of Aircel-Maxis deal.

An ED official said the contract to buy 43 aircraft from Airbus was finalised by a panel of ministers headed by Chidambaram in 2009. According to the ED, when the proposal to buy 43 aircraft from Airbus was sent to the Cabinet Committee on Security (CCS), there was a condition that the aircraft manufacturer would have to build training facilities and MRO (Maintenance, Repair and Overhaul) centres at a cost of Rs 70,000 crore. But later, when the purchase order was placed, the clause was removed.

The name of another UPA minister, Praful Patel, had also come up in the alleged scam in a charge sheet filed by the ED against corporate lobbyist Deepak Talwar on March 30 last year. Talwar was arrested last year by the ED after he was deported from the UAE.

The ED is probing the Air India-Indian Airlines merger; purchase of 111 aircraft from Boeing and Airbus at Rs 70,000 crore; ceding profitable routes and schedules to private airlines, and opening of training institutes with foreign investment.

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News Network
January 28,2020

Kolkata, Jan 28: West Bengal chief minister Mamata Banerjee Tuesday said she is ready for talks with Prime Minister Narendra Modi on the issue of Citizenship Amendment Act but the Centre has to first withdraw the contentious law.

Banerjee said protesting against the decisions of the centre doesn't make opposition parties anti-national and iterated that she will not implement CAA, NRC or NPR in the state.

"It is good that the prime minister is ready for talks but the Citizenship Amendment Act (CAA) must be revoked first. They (Centre) did not call an all-party meeting before taking a decision on Kashmir and CAA.

"We are ready for talks but first withdraw this Citizenship Amendment Act," Banerjee, a staunch critic of the BJP, said addressing a protest programme against CAA through paintings.

The West Bengal assembly had on Monday passed a resolution against the CAA to become the fourth state after Kerala, Punjab and Rajasthan, to do so. The state assembly had on September 6, 2019, passed a resolution against the NRC.

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