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.

Comments

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
March 9,2020

New Delhi, Mar 9: Petrol and diesel prices registered a drop across the country on Monday as global oil prices plummeted around 30 per cent after Saudi Arabia slashed prices and set plans for a dramatic increase in crude production in April.

In New Delhi, petrol price fell by 24 paise intra-day and stood at Rs 70.59 per litre. Diesel in the national capital was retailed at Rs 63.26 per litre on Monday as against Rs 63.51 on Sunday.

The retail price of petrol in Kolkata saw a drop of 23 paise to Rs 73.28 per litre. The diesel price fell by 25 paise in the eastern metropolitan city to retail at Rs 65.59 per litre.

In Mumbai, petrol price was Rs 76.29 per litre as against Rs 76.53 a day earlier. Diesel was retailed at Rs 66.24 per litre, 26 paise lower than on Sunday.

In Chennai, petrol was retailed at Rs 73.33 per litre, 25 paise lower than a day earlier. Diesel price saw a fall of 26 paise to retail at Rs 66.75 per litre in the southern metropolitan.

Global crude oil prices fell by as much as a third following Saudi Arabia's move to start a price war with Russia amid worries over the spread of coronavirus.

Brent crude futures were down 13.29 dollars or 29 per cent at 31.98 dollars a barrel by 04:33 hrs GMT after earlier dropping to 31.02 dollars, their lowest since February 12, 2016.

Brent futures were on track for their biggest daily decline since January 17, 1991 at the start of the first Gulf War.

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News Network
May 24,2020

New Delhi, May 24: The Indian economy is likely to slip into recession in the third quarter of this fiscal as loss in income and jobs and cautiousness among consumers will delay recovery in consumer demand even after the pandemic, says a report.

According to Dun & Bradstreet's latest Economic Observer, the country's economic recovery will depend on the efficacy and duration of implementation of the government's stimulus package.

"The multiplier effect of the stimulus measures on the economy will depend on three key aspects i.e. the time taken for effecting the withdrawal of the lockdown, the efficacy of implementation and duration of execution of the measures announced," Dun & Bradstreet India Chief Economist Arun Singh said.

The report noted that the government's larger-than-expected stimulus package is likely to re-start economic activities.

Besides, measures taken by the Reserve Bank of India like reducing the repo rate by a further 40 basis points to 4 per cent, extending the moratorium period by three months and facilitating working capital financing will also help stimulate the momentum.

Singh said while the measures announced by the government are "positive", most of them have been directed towards strengthening the supply side of the economy, and "it is to be noted that supply needs to be matched with demand", he said.

Besides, "in the absence of cash-in-hand benefits under the government's stimulus package, demand for goods and services is expected to remain depressed", he added.

He further said the loss in income and employment opportunities, and cautiousness among consumers, will lead to a delayed recovery in consumer demand, even after the pandemic. As debt and bad loan levels increase, the banking sector might face challenges.

The report further noted that even as the monetary stimulus is expected to inject liquidity and stimulate demand for a wider section of the economy, the channelisation of funds from the financial institutions will be subjected to several constraints.

The foremost concern being increase in risk averseness, as the balance sheets of firms, households, and banks/NBFCs have weakened considerably and low demand for funds by firms as production activities have been on a standstill during the lockdown period, Singh said.

India has been under lockdown since March 25 to contain the spread of the coronavirus, resulting in supply disruptions and demand compression.

Prime Minister Narendra Modi imposed a nationwide lockdown to control the spread of coronavirus on March 25. It has been extended thrice, with some relaxations. The fourth phase of the lockdown is set to expire on May 31. 

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News Network
June 15,2020

New Delhi, Jun 15: With an increase of 11,502 cases in the past 24 hours, the COVID-19 count in India reached 3,32,424 on Monday, according to the Union Health and Family Welfare Ministry.

The spike is marginally lower than the highest-ever spike of 11,929 new cases the country registered a day earlier.

With 325 deaths being reported from across the country, the toll due to COVID-19 has now reached 9,520.

The COVID-19 count includes 1,53,106 active cases while 1,69,798 patients have been cured and discharged or migrated so far.

Maharashtra with 1,07,958 cases continues to be the worst-affected state in the country with 53,030 active cases while 50,978 patients have been cured and discharged in the state so far. 3,950 deaths have been reported due to the infection so far from Maharashtra.

It is followed by Tamil Nadu with 44,661 cases and the national capital with 41,182 confirmed cases.

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