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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August 8,2020

Kozhikode, Aug 8: A tailwind or crosswind could be the reason for the Air India Express flight mishap at Kozhikode international airport in Kerala, according to some aviation experts. 

Team of DGCA and AIE already reached the spot. With the death of the captain and co-pilot in the mishap, the investigation would be focusing mainly on the voice recorders and other technical aspects.

It is learnt that the ill-fated aircraft, IX 1344 with 190 onboard including crew, was initially planning to land on runway-28 of the airport. But later the pilot opted runway-10 which is toward the other direction. Pilots would be taking the decisions on the basis of inputs from ATC.

The questions now doing the rounds are what made the pilot opt runway-10 and whether the tabletop runway lacked adequate safety parameters.

An aviation expert, who didn't want to be quoted, said that Capt Deepak Sathe, who was commandeering the aircraft, was a well-experienced pilot and was also familiar with the terrains. Hence the chances of any error from his part was very unlikely. Hence a fair in-depth probe was required to find the exact cause.

Though the Kozhikode airport has an Instrument Landing System, it was of category-I for which pilot's visibility is very crucial toward a touchdown. Since it is a tabletop airport and rough weather prevailing in the region, the chances of tailwind was also high, said sources.

There had been safety concerns about the airport over quite some time. In 2011 aviation safety consultant captain Mohan Ranganathan reportedly gave a report citing the safety issues, especially the buffer zones at the end of the runway.

However, an AAI officer said that rectification steps were already done by last year by widening the Runway End Safety Area (RESA) from 90 metre to 240 metre. However, the length of the runway had to be reduced to 2,700 metre from 2,850. The AAI was also constantly pressing for increasing the runway length to 3,150 metres. But that was getting delayed due to land acquisition issues pending with the state government.

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News Network
May 27,2020

New Delhi, May 27: With 6,387 new coronavirus cases in the last 24 hours, India's count of COVID-19 rose to 1,51,767 on Wednesday, said the Union Ministry of Health and Family Welfare.

170 people have also died in the last 24 hours due to the infection.

Currently, there are 83,004 active cases while 64,425 COVID-19 positive patients have been cured/discharged and one has migrated. So far, a total of 4,337 deaths have taken place across the country.

Among all states, Maharashtra has the highest number of COVID-19 cases with 54,758. Tamil Nadu has 17,728 cases with Gujarat at 14,821 cases. The national capital has 14,465 reported cases of coronavirus.

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News Network
January 6,2020

Jan 6: India’s Finance Ministry has delivered a challenge to its revenue collectors: meet tax targets despite $20 billion of corporate tax cuts.

Through a video conference on Dec. 16, officials were exhorted to meet the direct tax mop-up target of 13.4 trillion rupees ($187 billion), a government official told reporters. Collection in the eight months to November grew at 5% from a year earlier, against the desired 17%.

The missive shows Prime Minister Narendra Modi’s urgent need to buoy public finances in a slowing economy where April-November tax collections were half the amount budgeted. Authorities withheld some payments to states and have capped ministries’ expenditure as the fiscal deficit ballooned beyond the target.

The government’s efforts to maintain its deficit goal goes against advice from some quarters, including central bank Governor Shaktikanta Das, who urged more spending to spur economic growth.

It’s uncertain though how much room Modi’s administration has to boost expenditure, given that it may already be borrowing as much as 540 billion rupees through state-run companies, a figure that isn’t reflected on the federal balance sheet. Uncertainty about public finances pushed up sovereign yields in November and December, compelling Das to announce unconventional policies to keep costs in check.

“This is not a time to conceal the fiscal deficit by off-budget borrowing or deferring payments,” said Indira Rajaraman, an economist and a former member of the Reserve Bank of India’s board. “If they were to stick to the target, that would be catastrophic because there is so much pump-priming that is needed right now.”

GDP grew 4.5% in the quarter ended September, the slowest pace in more than six years as both consumption and investments cooled in Asia’s third-largest economy. Only government spending supported the expansion, piling pressure on Modi to keep stimulating.

S&P Global Ratings warned in December it may downgrade India’s sovereign ratings if economic growth doesn’t recover. Government support seems to be waning now, with ministries asked to cap spending in the final quarter of the financial year at 25% of the amount budgeted rather than 33% allowed earlier. This new rule will hamstring sectors including agriculture, aviation and coal, where not even half of annual targets have been disbursed.

As the federal government runs short of money, it’s been delaying payouts to state administrations.

Private hospitals have threatened to suspend cash-less services to government employees over non-payment of dues, while a builder informed the stock exchange about delayed rental payments from no less than the tax office itself.

India is considering a litigation-settlement plan that will allow companies to exit lingering tax disputes by paying a portion of the money demanded by the government, the Economic Times newspaper reported Saturday.

The move will help improve the ease of doing business besides unlocking a part of the almost 8 trillion rupees ($111 billion) caught up in these disputes. The step, which is being considered as part of the annual budget, could also bridge India’s fiscal gap.

Finance Minister Nirmala Sitharaman has refused to comment on the deficit goal before the official budget presentation due Feb. 1.

A deviation from target, if any, “will need to be balanced with a credible consolidation plan further-out,” said Radhika Rao, an economist at DBS Group Holdings Ltd. in Singapore.

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