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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News Network
May 22,2020

May 22: A Pakistan International Airlines (PIA) flight on its way from Lahore to Karachi, crashed in the area near Jinnah International Airport on Friday, according to Civil Aviation Authority officials.

Geo News reported that the plane crashed at the Jinnah Ground area near the airport as it was approaching for landing. There were more than 90 passengers on board the Airbus aircraft. Black smoke could be seen from afar at the crash site, say eye witnesses.

There were no immediate reports on the number of casualties. The aircraft arriving from the eastern city of Lahore was carrying 99 passengers and 8 crew members, news agency AP said, quoting Abdul Sattar Kokhar, spokesman for the country’s civil aviation authority.

Witnesses said the Airbus A320 appeared to attempt to land two or three times before crashing in a residential area near Jinnah International Airport.

Flight PK-303 from Lahore was about to land in Karachi when it crashed at the Jinnah Garden area near Model Colony in Malir, just a minute before its landing, Geo News reported.

Local television reports showed smoke coming from the direction of the airport. Ambulances were on their way to the airport.

News agency said Sindh’s Ministry of Health and Population Welfare has declared emergency in all major hospitals of Karachi due to the plane crash.

It’s the second plane crash for Pakistani carrier in less than four years. The airline’s chairman resigned in late 2016, less than a week after the crash of an ATR-42 aircraft killed 47 people. The incident comes as Pakistan was slowly resuming domestic flights in the wake of the coronavirus pandemic, Bloomberg reported.

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News Network
May 12,2020

London, May 12: British Prime Minister Boris Johnson has warned that a mass vaccine for the novel coronavirus may be over a year away and, in the worst-case scenario, may in fact never be found.

In his foreword to the government’s new 50-page guidance on a step by step easing of the lockdown measures in place to control the spread of the deadly virus, the UK prime minister lays out plans for businesses to gradually start reopening with “COVID-19 Secure” measures of social distancing and for the public to use “good solid British common sense” as the economy is unlocked.

“A mass vaccine or treatment may be more than a year away,” said Johnson, highlighting the work being done in the UK by scientists at Oxford University and Imperial College London towards this mission.

“Indeed, in a worst-case scenario, we may never find a vaccine. So our plan must countenance a situation where we are in this, together, for the long haul, even while doing all we can to avoid that outcome,” he said.

Admitting that a vaccine or drug-based treatment is the only “feasible long-term solution”, he said the UK has accelerated this with “promising” vaccine development programmes and a collaboration between Oxford University and pharma major AstraZeneca was a vital step that could help rapidly advance the manufacture of a Covid-19 vaccine when it is ready.

As part of global efforts, he flagged the GBP 388 million in aid funding for research into vaccines, tests and treatment, including GBP 250m to the Coalition for Epidemic Preparedness Innovations.

“But while we hope for a breakthrough, hope is not a plan,” he said, as he unveiled his plan for starting to lift lockdown restrictions from this week in phases.

Following a televised address to the nation on Sunday night and a statement in Parliament on Monday, the guidance comes into effect in public life across England from Wednesday when people will be allowed one-to-one contact with people other than those they live with, as long as they remain outside and two metres apart.

They are allowed to play sport with a friend or family member from outside their household or socialise with them in the open air for the first time in more than six weeks since the lockdown was imposed.

People are still advised to work from home where possible but start heading into work where necessary, in sectors such as construction and manufacturing, keeping the social distancing norms in place.

Under the step by step plan, by the start of next month non-essential shops will also reopen, with some hairdressers, pubs and cinemas to follow from July. However, as part of a Covid-19 Alert System, if infection rates are seen to be rising again, restrictions would be tightened “possibly at short notice”.

Fines for breaching the new rules will also be increased to GBP 100 and will double for each repeat offence, up to a maximum of GBP 3,200.

Johnson said: "I must ask the country to be patient with a continued disruption to our normal way of life, but to be relentless in pursuing our mission to build the systems we need. The worst possible outcome would be a return to the virus being out of control – with the cost to human life, and – through the inevitable re-imposition of severe restrictions – the cost to the economy. We must stay alert, control the virus, and in doing so, save lives.

“Then, as vaccines and treatment become available, we will move to another new phase, where we will learn to live with Covid-19 for the longer term without it dominating our lives.”

The devolved administrations of Scotland and Wales are putting their own measures in place and keeping the “stay at home” message in place, rather than switch to the new “stay alert” message.

The UK government’s latest messaging has come under attack from the Opposition and other sections of society over a feared lack of clarity for the general public.

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News Network
July 27,2020

Chengdu, China, Jul 27: The American flag was lowered at the United States consulate in Chengdu on Monday, days after Beijing ordered it to close in retaliation for the shuttering of the Chinese consulate in Houston.

Footage on state broadcaster CCTV from outside the consulate showed the flag being slowly lowered early Monday morning, after diplomatic tensions soared between the two powers with both alleging the other had endangered national security.

Relations deteriorated in recent weeks in a Cold War-style standoff, with the Chengdu mission Friday ordered to shut in retaliation for the forced closure of Beijing's consulate in Houston, Texas.

The deadline for the Americans to exit Chengdu has been unclear, but the Chinese consulate in Houston was given 72 hours to close after the original order was made.

On Saturday news agency reporters saw workers removing the US insignia from the front of the consulate.

Over the weekend, removals trucks entered the US consulate and cleaners were seen carting large black rubbish bags from the building.

Beijing says closing the Chengdu consulate was a "legitimate and necessary response to the unreasonable measures by the United States", and has alleged that staff at the diplomatic mission endangered China's security and interests.

Washington officials, meanwhile, said there had been unacceptable efforts by the Chinese consulate in Houston to steal US corporate secrets.

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