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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Agencies
August 5,2020

Ayodhya, Aug 5: Prime Minister Narendra Modi on Wednesday recalled the significance of the path of 'maryada' associated with Lord Ram in the backdrop of the situation created by COVID-19 and emphasised the importance of social distancing and wearing face masks.

He said that the current situation demands 'maryada' should be 'do gaz ki doori, mask hai zaroori' and exhorted everyone to follow it.

In his speech after laying the foundation stone of the Ram Temple in Ayodhya, the Prime Minister said the temple of Lord Ram will inspire and guide humans for ages to come.

He said that the path of `maryada' followed by Lord Ram is all the more necessary today in the situation created by COVID-19.

"The `maryada' (need) today is do gaj ki doori, mask hai jaroori (keep distance of two yards, wear mask). The Almighty may keep all the citizens healthy and happy, this is my prayer. The blessings of Mother Sita and Shri Ram be always there on the citizens," he said.

The Prime Minister termed the occasion as historic and said that India is starting a glorious chapter when people across the country are excited and emotional to have finally achieved what they had been waiting for centuries.

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News Network
January 1,2020

New Delhi, Jan 1: In the backdrop of huge losses borne by airlines, Aviation Minister Hardeep Singh Puri has said the government is concerned that more airlines will shut down if predatory pricing continues. "Some predatory pricing is taking place" in airfares, the minister told reporters on Tuesday. Mr Puri however ruled out any plan by the government to regulate airfares. The remarks come amid high competition in the country's aviation sector, struggling against high fuel prices and other operating costs.

"The interesting thing that we have observed is that on Delhi-Mumbai route 20 years ago, the average fare was Rs 5,100. Today, the average fare is Rs 4,600. Some predatory pricing is taking place. It means people are selling tickets below their cost," he said.

"One of our concerns is that if there is predatory pricing, then the airlines will stop functioning. This is not Air India's problem only. Jet Airways got shut down. Before that, it was Kingfisher airline," he said.

IndiGo and SpiceJet - two of the country's biggest airlines - reported losses of Rs 1,062 crore and Rs 463 crore respectively in the second quarter of 2019-20. Other airlines have also reported losses in the quarter that ended on September 30, 2019.

Asked if predatory pricing is the reason for the ill health of the airlines, the minister said, "No, there are many reasons... Predatory pricing is one of the factors. But the profitability of an airline is dependent on (a) number of things."

Asked if the trend of predatory pricing has come down after regular discussion with the airlines, he said, "Yes, absolutely."

"It is (a) constant battle. An ideal situation from an airline's point of view is that they grow and they are also able to charge more fares. What fares they charge is their business. Our advice to them is to charge realistic fares," he added. "It should not be too high. And it is not in your business interests if you are imposing predatory fares."

The minister also said that the government is not planning to regulate fares. "No regulation. It has to be done within deregulation system.... If I put a cap on fare, the airline will start charging that cap only... that cap will become the normal fare... So, within a deregulated structure, we have to bring about an equilibrium," the minister said.

"Government, periodically, at my level or at secretary''s level, we sit down with the main aircraft operators and tell them it is in your interest not to allow such practices which undermine the civil aviation sector."

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News Network
May 22,2020

Mumbai, May 22: The Reserve Bank of India (RBI) on Friday reduced repo rate by 40 basis points to 4 per cent in an effort to further boost liquidity in the economy which has been reeling under the impact of COVID-19 induced countrywide lockdown.

As a result, the reverse repo rate stands at 3.35 per cent, said RBI Governor Shaktikanta Das. The six-member monetary policy committee (MPC) voted 5:1 in favour of the decision.

Repo rate is the rate at which a country's central bank lends money to commercial banks, and the reverse repo rate is the rate at which it borrows from them. 

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