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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Agencies
May 14,2020

Mumbai, May 14: The Shiv Sena on Thursday raised questions over the Centre's Rs 20 lakh crore stimulus package announced to revive the COVID-hit economy, and asked if India is not a "self-reliant" country at present.

An editorial in Sena mouthpiece 'Saamana' wondered how Rs 20 lakh crore will be raised, and opined that an environment needs to be created where industrialists, trade and business sectors are encouraged to invest.

On the path of new self-reliance, India cannot afford industrialists running away, and for that "political institutions like the ED and CBI need to be put in lockdown for some time," it said.

Prime Minister Narendra Modi on Tuesday announced new financial incentives on top of the previously announced packages for a combined stimulus of Rs 20 lakh crore, saying the COVID-19 crisis has provided India an opportunity to become self-reliant and emerge as the best in the world.

The Sena said the country is being told that the package will be beneficial for MSMEs (micro, small and medium enterprises), poor labourers, farmers and the tax-paying middle class.

"The package (as per the Centre) will reach 130 crore Indians and the country will become self-reliant. Does this mean India is not a self-reliant country at present?" the Marathi daily asked.

It is good that PPE kits and N95 masks are now being manufactured in India, it said.

"Any country progresses ahead while learning from crisis and through struggle. Before Independence, not even a needle was manufactured in India but in 60 years, India became self-reliant in science, technology, agro business, defence, manufacturing and atomic science," it said.

An institution like the Indian Council of Medical Research (ICMR), which is helping in the manufacturing of PPE kits, is part of the self-reliant India, it noted.

Wondering how Rs 20 lakh crore, as announced in the central package, will be raised, the Sena said an "environment needs to be created where industrialists, trade and business sectors will be encouraged to invest".

"India, on path of new self-reliance, cannot afford industrialists running away, and for that political institutions like the Enforcement Directorate (ED) and the Central Bureau of Investigation (CBI) need to be put in lockdown for some time," the paper said.

Despite announcing the 'lockdown-4' and the economic package, why its impact has not been reflected in the share market? it asked.

"Investors are in a dilemma. The prime minister and chief ministers must show them trust and support," it said.

"Earlier it was Pandit Nehru and now it is Modi. If (former prime minister) Rajiv Gandhi had not laid the foundation of a digital India, there wouldn't be video conference of PM, CMs and bureaucracy in times of coronavirus," the Uddhav Thackeray-led party said.

It agreed with Modi that coronavirus will stay for long, and lives need not revolve around it.

"We need to get back on our feet again," the Sena said.

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News Network
March 13,2020

Bhopal, Mar 13: The Madhya Pradesh Economic Offences Wing (EOW) on Thursday decided to verify facts afresh in a complaint against former Union Minister Jyotiraditya Scindia and his family, in which they are accused of falsifying a property document while selling land.

The development came after Mr Scindia quit the Congress and joined the BJP on Wednesday. 22 MLAs who belong to his camp also resigned, threatening the survival of the Kamal Nath government in the state.

"Yes, an order has been given for re-verification of facts in the complaint filed by Surendra Shrivastava," an Economic Offences Wing official told PTI.

An EOW release said Mr Shrivastava on Thursday filed a new complaint against Mr Scindia and his family, alleging that by falsifying a registry document, they sold him a piece of land at Mahalgaon which was smaller by 6,000 sq feet than the original agreement in 2009.

He had lodged the complaint first on March 26, 2014. But it was investigated and closed in 2018, the EOW official said. "As he again petitioned us today, we will re-verify the facts," the officer said.

Jyotiraditya Scindia's close aide Pankaj Chaturvedi alleged that it was political vendetta.

"The case had been closed for want of evidence. Now for vengeance, it is being reopened. We have full faith in the Constitution and law. We will get justice and Kamal Nath government a befitting reply," Mr Chaturvedi said.

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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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