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 21,2020

Beijing, Mar 21: China reported no domestically transmitted coronavirus cases for the third consecutive day even as seven more fatalities have been confirmed, taking the death toll in the country to 3255.

No new domestically transmitted cases of COVID-19 were reported on the Chinese mainland for the third day in a row on Friday, China's National Health Commission (NHC) said on Saturday.

The overall confirmed cases on the mainland had reached 81,008 by the end of Friday, which included 3,255 who died, 6,013 patients still undergoing treatment, 71,740 patients who had been discharged after recovery, the NHC said.

The NHC said 41 new confirmed COVID-19 cases were reported on the Chinese mainland on Friday from the people arriving from abroad, taking the total number of imported cases to 269.

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Agencies
January 9,2020

The World Bank says that a lack of credit and drop in private consumption have led to a gloomy growth outlook for India with a steep cut in growth rate for the current fiscal year and only a modest gain projected for the next year.

India's growth rate is forecast to be only 5 per cent for the current fiscal year, weighed down by a growth of only 4.5 per cent in the July-September quarter, according to the 2020 Global Economic Prospects report released on Wednesday.

"In India, [economic] activity was constrained by insufficient credit availability, as well as by subdued private consumption," the Bank said.

The growth rate is forecast by the Bank to pick up to 5.8 per cent in the next fiscal year and to 6.1 per cent in 2021-22.

India's growth rate was 6.8 per cent in 2018-19.

The 5 per cent growth rate projection for the current financial year is a sharp cut of 2.5 per cent from the 7.5 per cent forecast made by the Bank in January last year, toppling it from the rank of the world's fastest growing economy.

India's performance follows a global trend of lowered growth weighed down by developed economies.

The report estimated world economic growth rate to be only 2.4 per cent last year and forecast it to edge up 0.1 per cent to 2.5 per cent in the current year.

Even with the lower growth rate of 5 per cent in the current fiscal year and 5.8 per cent forecast for the next, India holds the second rank among large economies, behind only China with an estimated growth rate of 6.1 per cent for 2019 and 5.9 per cent this year.

The report blamed "weak confidence, liquidity issues in the financial sector" and "weakness in credit from non-bank financial companies" for India's slowdown.

The Bank predicated India's recovery to 5.8 per cent in the coming financial year for India but "on the monetary policy stance remaining accommodative" and the assumption that "the stimulative fiscal and structural measures already taken will begin to pay off."

It also warned that sharper-than-expected slowdown in major external markets such as United States and Europe, would affect South Asia through trade, financial, and confidence channels, especially for countries with strong trade links to these economies."

The Bank said that the growth of advanced economies was 1.6 per cent last year and "is anticipated to slip to 1.4 per cent in 2020 in part due to continued softness in manufacturing."

In contrast the growth of emerging market and developing countries is expected to accelerate from 3.5 per cent last year to 4.1 per cent this year, the report said.

In South Asia, Bangladesh is estimated to have the highest growth rate of 7.2 per cent in the current fiscal year, although down from 8.1 per cent last fiscal year.

But its higher regional growth rates are coming off a lower base with a per capital gross domestic product of $1,698 compared to $2,010 for India.

Bangladesh is expected to grow by 7.3 per cent in the next financial year.

Pakistan's growth rate is estimated at only 2.4 per cent in the current fiscal year and is projected to rise to 3 per cent in the next, according to the Bank.

The Bank blamed monetary tightening in Pakistan for a sharp deceleration in fixed investment and a considerable softening in private consumption for the fall in growth rate from 3.3 per cent in the 2018-19 fiscal year.

Sri Lanka's growth rate was estimated to be 2.7 per cent last year and forecast to grow to 3.3 per cent this year.

Nepal grew by an estimated 6.4 per cent in the current fiscal year and will rise to 6.5 per cent in the next.

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News Network
February 13,2020

Feb 13: Two Indian crew on board a cruise ship off the Japanese coast have tested positive for the novel coronavirus, the Indian Embassy in Japan said on Wednesday as authorities confirmed that 174 people have been infected with the deadly disease.

The cruise ship Diamond Princess with 3,711 people on board arrived at the Japanese coast early last week and was quarantined after a passenger who de-boarded last month in Hong Kong was found to be the carrier of the novel virus on the ship.

A total of 138 Indians, including passengers and crew, were on board the ship.

“Due to the suspicion of novel coronavirus (nCoV) infection, the ship has been quarantined by the Japanese authorities till February 19, 2020,” the embassy said in a statement.

“Altogether 174 people have been tested positive for nCoV, including two Indian crew members,” it said.

All the infected people have been taken to hospitals for adequate treatment, including further quarantine, in accordance with the Japanese health protocol, it said.

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