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
January 31,2020

New Delhi, Jan 31: The Supreme Court Friday dismissed the plea filed by one of the four death row convicts in the Nirbhaya gang-rape and murder case, Pawan Gupta, seeking review of its order rejecting his juvenility claim.

The review plea filed earlier in the day was taken up for consideration in-chamber by a bench comprising Justices R Banumathi, Ashok Bhushan and A S Bopanna. 

On January 20, the apex court had rejected the plea by Pawan who had challenged the Delhi High Court's order dismissing his juvenility claim.

Advocate A P Singh, who is representing Pawan in the case, said he filed a petition on his behalf seeking review of the top court's January 20 order on Friday.

While dismissing the plea, the top court had said there was no ground to interfere with the high court order that rejected Pawan's plea and his claim was rightly rejected by the trial court as also the high court.

It had said the matter was raised earlier in the review petition before the apex court which rejected plea of juvenility taken by Pawan and another co-accused Vinay Kumar Sharma and that order has attained finality.

Singh had argued that as per his school leaving certificate, he was a minor at the time of the offence and none of the courts, including trial court and high court, ever considered his documents.

Solicitor General Tushar Mehta, appearing for the Delhi Police, had said Pawan's claim of juvenility was considered at each and every judicial forum and it will be a travesty of justice if the convict is allowed to raise the claim of juvenility repeatedly and at this point of time.

The trial court on January 17 issued black warrants for the second time for the execution of all the four convicts in the case -- Mukesh Kumar Singh (32), Pawan (25), Vinay (26) and Akshay (31) -- in Tihar jail at 6 am on February 1. Earlier, on January 7, the court had fixed January 22 as the hanging date.

As of now, only Mukesh has exhausted all his legal remedies including the clemency plea which was dismissed by President Ram Nath Kovind on January 17 and the appeal against the rejection was thrown out by the Supreme Court on January 29.

Convict Akshay's curative petition was dismissed by the top court on January 30. Another death row convict Vinay moved mercy plea before President on January 29, which is pending.

Singh has also approached the trial court seeking stay on the execution scheduled on February 1, saying the legal remedies of some of the convicts are yet to be availed.

A 23-year-old paramedic student, referred to as Nirbhaya, was gang-raped and brutally assaulted on the intervening night of December 16-17, 2012, in a moving bus in south Delhi by six people before she was thrown out on the road.

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News Network
March 3,2020

Mar 3: Just hours after the ending of a week-long “reduction” in violence that was crucial for Donald Trump’s peace deal in Afghanistan, the Taliban struck again: On Monday, they killed three people and injured about a dozen at a football match in Khost province. This resumption of violence will not surprise anyone actually invested in peace for that troubled country. The point of the U.S.-Taliban deal was never peace. It was to try and cover up an ignominious exit for the U.S., driven by an election-bound president who feels no responsibility toward that country or to the broader region.

Seen from South Asia, every point we know about in the agreement is a concession by Trump to the Taliban. Most importantly, it completes a long-term effort by the U.S. to delegitimize the elected government in Kabul — and, by extension, Afghanistan’s constitution. Afghanistan’s president is already balking at releasing 5,000 Taliban prisoners before intra-Afghan talks can begin — a provision that his government did not approve.

One particularly cringe-worthy aspect: The agreement refers to the Taliban throughout  as “the Islamic Emirate of Afghanistan that is not recognized by the United States as a state and is known as the Taliban.” This unwieldy nomenclature validates the Taliban’s claim to be a government equivalent to the one in Kabul, just not the one recognised at the moment by the U.S. When read together with the second part of the agreement, which binds the U.S. to not “intervene in [Afghanistan’s] domestic affairs,” the point is obvious: The Taliban is not interested in peace, but in ensuring that support for its rivals is forbidden, and its path to Kabul is cleared.

All that the U.S. has effectively gotten in return is the Taliban’s assurance that it will not allow the soil of Afghanistan to be used against the “U.S. and its allies.” True, the U.S. under Trump has shown a disturbing willingness to trust solemn assurances from autocrats; but its apparent belief in promises made by a murderous theocratic movement is even more ridiculous. Especially as the Taliban made much the same promise to an Assistant Secretary of State about Osama bin Laden while he was in the country plotting 9/11.

Nobody in the region is pleased with this agreement except for the Taliban and their backers in the Pakistani military. India has consistently held that the legitimate government in Kabul must be the basic anchor of any peace plan. Ordinary Afghans, unsurprisingly, long for peace — but they are, by all accounts, deeply skeptical about how this deal will get them there. The brave activists of the Afghan Women’s Network are worried that intra-Afghan talks will take place without adequate representation of the country’s women — who have, after all, the most to lose from a return to Taliban rule.

But the Pakistani military establishment is not hiding its glee. One retired general tweeted: “Big victory for Afghan Taliban as historic accord signed… Forced Americans to negotiate an accord from the position of parity. Setback for India.” Pakistan’s army, the Taliban’s biggest backer, longs to re-install a friendly Islamist regime in Kabul — and it has correctly estimated that, after being abandoned by Trump, the Afghan government will have sharply reduced bargaining power in any intra-Afghan peace talks. A deal with the Taliban that fails also to include its backers in the Pakistani military is meaningless.

India, meanwhile, will not see this deal as a positive for regional peace or its relationship with the U.S. It comes barely a week after Trump’s India visit, which made it painfully clear that shared strategic concerns are the only thing keeping the countries together. New Delhi remembers that India is not, on paper, a U.S. “ally.” In that respect, an intensification of terrorism targeting India, as happened the last time the U.S. withdrew from the region, would not even be a violation of Trump’s agreement. One possible outcome: Over time the government in New Delhi, which has resolutely sought to keep its ties with Kabul primarily political, may have to step up security cooperation. Nobody knows where that would lead.

The irresponsible concessions made by the U.S. in this agreement will likely disrupt South Asia for years to come, and endanger its own relationship with India going forward. But worst of all, this deal abandons those in Afghanistan who, under the shadow of war, tried to develop, for the first time, institutions that work for all Afghans. No amount of sanctimony about “ending America’s longest war” should obscure the danger and immorality of this sort of exit.

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Agencies
June 18,2020

New Delhi, Jun 18: Vodafone Idea on Thursday told the Supreme Court that it has incurred Rs 1 lakh crore losses as it insisted it is not in a position to furnish bank guarantees.

A bench comprising Justices Arun Mishra, S. Abdul Nazeer, and M.R. Shah, taking up the adjusted gross revenue (AGR) matter through video conferencing, directed the telecom companies to submit their financial documents and books for the last 10 years.

Asking Vodafone if it was a foreign company, the bench said that how can the company say it would not furnish any bank guarantee.

"What if you fly away overnight in future without paying anything?" it asked.

Senior advocate Mukul Rohatgi, representing Vodafone Idea, denied his client is a completely foreign firm and cited before the bench its tie-ups and investments.

Vodafone owes over Rs 58,000 crore as AGR dues and so far, has paid close to Rs 7,000 crore.

Rohatgi contended before the court that the telecom company is in a tough situation, and cannot furnish any fresh bank guarantee, as profits have eluded the company in past many quarters. He submitted before the bench that Rs 15,000 crore bank guarantees are lying with the government, and his client's losses are over Rs 1 lakh crore.

"I cannot offer any more surety," he informed the bench.

Justice Mishra noted that this is public money and these dues should be recovered. "Do not tell us that you will pay if you were to make profits... the money must come," he noted.

Justice Shah observed that the telecom industry is the only industry which earned during the Covid-19 pandemic. "After all, this money will be used for public welfare", he said.

Rohatgi argued that his client would have to fold up if orders were issued to clear dues tomorrow. "11,000 employees will have to go without notice, as we cannot pay them," he added.

Senior advocate Abhishek Manu Singhvi, appearing for Bharti Airtel, contended before the court that out of Rs 21,000 crore AGR dues, the company has already deposited a sum of Rs 18,000 crore.

He argued that his client has given a bank guarantee, in excess of demand, to DoT, and supported the proposal for phased repayment of remaining AGR dues. He insisted that the company needs to sit down with the government and calculate the dues. Airtel owes Rs 25,976 crore after paying Rs 18,000 crore, as per the government.

Senior advocate Arvind Datar, representing Tata Telecom, informed the bench that his client has paid Rs 6,504 crore in AGR dues so far, and furnishing a bank guarantee may adversely impact investments in the sector.

The total AGR dues are close to Rs 1.5 lakh crore.

The top court will now take up the matter in the third week of July.

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