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
June 24,2020

New Delhi, June 24: The United Arab Emirates (UAE) has asked Air India to not carry any passengers aboard the repatriation flights to UAE being operated under the Vande Bharat Mission.

As per the Guidelines issued by the General Civil Aviation Authority of United Arab Emirates (UAE)- Safety Decision 2020-01 (Issue 17) Q and A Guidance For Foreign Operators, on June 23, 2020 - transportation of passengers ( UAE Nationals and Non - UAE Nationals) to the United Arab Emirates on the repatriation flights is not allowed.

In view of the foregoing, all passengers including the Indian Nationals who are holding valid Residency Permit / Work Permit of United Arab Emirates and have procured approval of the UAEs Federal Authority for Identity and Citizenship- UAE (ICA) of United Arab Emirates or an approval from the General Directorate of Residency and Foreigners Affairs (GDRFA) applicable to Dubai would need to have specific approval from the Embassy of the United Arab Emirates in New Delhi and their UAE Ministry of Foreign Affairs and International Cooperation (MOFAIC) to travel from India to United Arab Emirates (UAE) on these repatriation flights.

All passengers need to comply with the quarantine and COVID-19 test requirements as per the preventive and the precautionary measures required by the appropriate health authorities, as notified from time to time.

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News Network
March 16,2020

New Delhi, Mar 16: Due to the coronavirus pandemic, most airlines in the world will be bankrupt by the end of May and only a coordinated government and industry action right now can avoid the catastrophe, said global aviation consultancy firm CAPA in a note on Monday.

"As the impact of the coronavirus and multiple government travel reactions sweep through our world, many airlines have probably already been driven into technical bankruptcy, or are at least substantially in breach of debt covenants," it stated.

Across the world, airlines have announced drastic reduction in their operations in the wake of the coronavirus outbreak. For example, Atlanta-based Delta Air Lines stated on Sunday that it would be grounding 300 aircraft in its fleet and reduce flights by 40 per cent.

The US has suspended all tourist visas for people belonging to the European Union, the UK and Ireland. Similarly, the Indian government has suspended all tourist visas and e-visas granted on or before March 11.

CAPA, in its note on Monday, said, "By the end of May-2020, most airlines in the world will be bankrupt. Coordinated government and industry action is needed - now - if catastrophe is to be avoided."

Cash reserves are running down quickly as fleets are grounded and "what flights there are operate much less than half full", it added.

"Forward bookings are far outweighed by cancellations and each time there is a new government recommendation it is to discourage flying. Demand is drying up in ways that are completely unprecedented. Normality is not yet on the horizon," it said.

India's largest airline IndiGo -- which has around 260 planes in its fleet -- said on Thursday that it has seen a decline of 15-20 per cent in daily bookings in the last few days.

The low-cost carrier had stated that it expects its quarterly earnings to be materially impacted due to such decline.

CAPA said the failure to coordinate the future will result in protectionism and much less competition.

"The alternative does not bear thinking about. An unstructured and nationalistic outcome will not be survival of the fittest.

"It will mostly consist of airlines that are the biggest and the best-supported by their governments. The system will reek of nationalism. And it will not serve the needs of the 21st century world. That is not a prospect that any responsible government should be prepared to contemplate," the consultancy firm said.

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Agencies
May 30,2020

New Delhi, May 30: The COVID-19 pandemic has left the Indian private healthcare sector in acute financial distress, a new survey said on Friday adding that the healthcare facilities in the country have witnessed at least 80 per cent fall in average revenue.

Post the lockdown from March 24, Indian hospitals have seen a large impact, especially among small and medium-sized hospitals, which are now facing existential challenges.

The survey by healthcare industry body NATHEALTH was conducted in 251 healthcare facilities across nine states and 69 cities to assess the impact of COVID-19 on the domestic healthcare industry.

The findings showed that 90 per cent of the surveyed healthcare facilities are facing financial challenges with 21 per cent facilities facing an existential threat.

"There is a need for a stimulus package to revive the Indian healthcare industry which will be crucial to provide much-needed relief to the healthcare sector which is the frontline defence in this fight against COVID-19," said Dr Sudarshan Ballal, President NATHEALTH.

According to the survey, hospitals in tier 1 and tier 2 cities are experiencing a 78 per cent reduction in OPD footfalls, and a drop of 79 per cent in in-patient admissions.

The study found that 90 per cent of organisations require some form of financial assistance.

The findings indicated that even after the lockdown lift, the situation will remain difficult for the hospitals and nursing homes as patients will hesitate from visiting hospitals.

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