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
February 14,2020

Lucknow, Feb 14: Uttar Pradesh doctor Kafeel Khan was on Friday booked under the National Security Act (NSA) over his alleged anti-CAA speech at Aligarh Muslim University on December 12, 2019.

The Uttar Pradesh slapped NSA on Kafeel Khan on Friday even as the doctor waited to be released from jail despite being granted bail on Monday in connection with his alleged inflammatory speech.

SP Crime Dr Arvind said that there were sufficient grounds to book the doctor under NSA.

The suspended pediatrician, Kafeel Khan, was arrested for allegedly delivering a controversial speech during Anti-CAA protests on December 12 at the Aligarh Muslim University or AMU. While he was granted bail on Monday, his family members claimed on Thursday that he was yet to be released.

Dr Kafeel Khan's brother Adeel Ahmed Khan had issued a statement saying that despite being granted bail Mathura jail authorities had not honoured the court's order.

Dr Kafeel Khan was arrested by the UP Special Task Force from Mumbai on January 29 for participating anti-CAA protest at AMU. A case was registered against him at the Civil Lines police station here for promoting enmity between different religions.

After his arrest in Mumbai, Dr Khan was brought to Aligarh, from where he was shifted to the district jail in neighbouring Mathura.

According to police, this was done as a precautionary measure in view of the anti-CAA protests on the AMU campus and at the Eidgah grounds in the old city. Police had said that the Dr Khan's presence in the Aligarh jail could have aggravated the law and order situation in the city.

The doctor was earlier arrested for his alleged role in the death of over 60 children in one week at the BRD Medical College in Gorakhpur in August 2017. Short supply of oxygen at the children's ward was blamed at that time for the deaths.

About two years later, a state government probe cleared Khan of all major charges, prompting him to seek an apology from the Yogi Adityanath government.

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News Network
February 24,2020

New Delhi, Feb 24: They hail from vastly different backgrounds — Donald Trump is the son of a property tycoon while Narendra Modi is a descendant of a poor tea-seller.

Yet the two teetotallers, loved by right-wing nationalists in their home countries, share striking similarities that have seen them forge a close personal bond, analysts say.

Ahead of the American leader's first official visit to India, which begins in Modi's home state of Gujarat on Monday, the world's biggest democracy has gone out of its way to showcase the chemistry between them.

In Gujarat's capital Ahmedabad, large billboards with the words "two dynamic personalities, one momentous occasion" and "two strong nations, one great friendship" have gone up across the city.

"There's a lot that Trump and Modi share in common, and not surprisingly these convergences have translated into a warm chemistry between the two," Michael Kugelman of the Washington-based Wilson Center said.

"Personality politics are a major part of international diplomacy today. The idea of closed-door dialogue between top leaders has often taken a backseat to very public and spectacle-laden summitry."

Since assuming the top political office in their respective countries — Modi in 2014 and Trump in 2017 — the two men have been regularly compared to each other.

Trump, 73, and Modi, 69, both command crowds of adoring flag-waving supporters at rallies. A virtual cult of personality has emerged around them, with their faces and names at the centre of their political parties' campaigns.

A focus of Trump's administration has been his crackdown on migrants, including a travel ban that affects several Muslim-majority nations, among others, while critics charge that Modi has sought to differentiate Muslims from other immigrants through a contentious citizenship law that has sparked protests.

Both promote their countries' nationalist and trade protectionist movements — Trump with his "America First" clarion call and Modi with his "Make in India" mantra.

And while they head the world's largest democracies, critics have described the pair as part of a global club of strongmen that includes Russia's Vladimir Putin and Brazil's Jair Bolsonaro.

"There are many qualities that Trump and Modi share — a love for political grandstanding and an unshakable conviction that they can achieve the best solutions or deals," former Indian diplomat Rakesh Sood said.

Modi and Trump have sought to use their friendship to forge closer bonds between the two nations, even as they grapple with ongoing tensions over trade and defence.

Despite sharing many similarities in style and substance, analysts say there are some notable differences between the pair.

Modi is an insider who rose through the ranks of the Bharatiya Janata Party after starting out as a cadre in Rashtriya Swayamsevak Sangh.

Trump is a businessman and a political outsider who has in some sense taken over the Republican Party.

"Modi is a more conventional leader than is Trump in that he hasn't sought to revolutionise the office he holds in the way that Trump has," said Kugelman, a longtime observer of South Asian politics.

He added that genuine personal connections between leaders of both countries have helped to grow the partnership.

"George Bush and Manmohan Singh, Barack Obama and Singh, Obama and Modi, now Modi and Trump — there has been a strong chemistry in all these pairings that has clearly helped the relationship move forward," he added.

Trump has also stood by the Indian leader during controversial decisions, including his revocation of autonomy for Kashmir and his order for jets to enter Pakistani territory following a suicide bombing.

Analysts said the leaders would use the visit to bolster their image with voters.

A mega "Namaste Trump" rally in Ahmedabad on Monday will be modelled after the "Howdy, Modi" Houston extravaganza last year when the Indian leader visited the US and the two leaders appeared before tens of thousands of Indian-Americans at a football stadium.

"The success of this visit... will have a positive impact on his (Trump's) re-election campaign and the people of Indian origin who are voters in the US — a majority of them are from Gujarat," former Indian diplomat Surendra Kumar said.

"On the Indian side, the fact that Prime Minister Modi... (shares) such warmth, bonhomie and informality with the most powerful man on Earth adds to his stature... as well as with hardcore supporters."

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Agencies
March 8,2020

Panic gripped big tech firms like Facebook and Twitter which decided to close their offices from Seattle to London as more employees tested positive for the new coronavirus.

Facebook shut its three London offices till Monday after an employee was diagnosed with COVID-19.

The social networking giant told nearly 3,000 employees in London to work from home after an employee, who is based in Singapore but visited the London offices between February 24-26, was diagnosed with the new coronavirus, Sky News reported on Friday.

"An employee based in our Singapore office who has been diagnosed with COVID-19 visited our London offices on February 24-26.

"We are therefore closing our London offices until Monday for deep cleaning and employees are working from home until then," the company said in a statement.

There have been 163 cases of coronavirus so far in the UK.

Earlier, Facebook recommended all its Bay Area employees in the US to work from home. The latest precautions come after San Francisco announced its first two coronavirus cases on Thursday.

Facebook has also shut its Seattle office until Monday after one of its contractors was confirmed to be infected with the virus. The infected contractor last visited the Facebook office on February 21. King County health officials said all Facebook sites should work from home until March 31.

Twitter shut its Seattle office for a 'deep clean' after an employee developed COVID-19 like symptoms though final result was still awaited.

"A Seattle-based employee has been advised by doctor about likely COVID-19, though still awaiting the final testing," Twitter said in a tweet on Friday.

"While the employee has not been at a Twitter office for several weeks and hasn't been in contact w/others, we're closing our Seattle office to deep clean," the company added.

According to The Seattle Times, at least 14 people have died due to COVID-19 in Washington State till date.

Amazon, Microsoft, Google and Facebook have advised their employees in Washington State to work from home.

Apple has reportedly suggested its employees at California campuses to work from home as an "extra precaution" while new coronavirus cases spread on the west coast in the US, especially Seattle area.

Apple's flagship developers' conference WWDC 2020 in June is also at the risk of getting cancelled as the Santa Clara public health department has warned against large public gatherings. The event draws nearly 5,000 developers from across the world.

The US death toll from the new coronavirus has climbed to 14, according to Johns Hopkins' tracker, with 329 cases reported across the country.

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