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 23,2020

Belgrade, June 23: Novak Djokovic tested positive for the coronavirus on Tuesday after taking part in a tennis exhibition series he organized in Serbia and Croatia.

The top-ranked Serb is the fourth player to test positive for the virus after first playing in Belgrade and then again last weekend in Zadar, Croatia.

His wife also tested positive. “The moment we arrived in Belgrade we went to be tested. My result is positive, just as Jelena's, while the results of our children are negative," Djokovic said in a statement.

Djokovic has been criticized for organizing the tournament and bringing in players from other countries amid the coronavirus pandemic.

Viktor Troicki said Tuesday that he and his pregnant wife have both been diagnosed with the virus, while Grigor Dimitrov, a three-time Grand Slam semifinalist from Bulgaria, said Sunday he tested positive.

Borna Coric played Dimitrov on Saturday in Zadar and said Monday he has also tested positive. There were no social distancing measures observed at the matches in either country and Djokovic and other players were seen hugging each other and partying in night clubs and restaurants after the matches.

 “Everything we did in the past month, we did with a pure heart and sincere intentions,” Djokovic said.

“Our tournament meant to unite and share a message of solidarity and compassion throughout the region.” Djokovic, who has previously said he was against taking a vaccine for the virus even if it became mandatory to travel, was the face behind the Adria Tour, a series of exhibition events that started in the Serbian capital and then moved to Zadar.

He left Croatia after the final was canceled and was tested in Belgrade. The statement said Djokovic was showing no symptoms.

Despite the positive test, Djokovic defended the exhibition series. “It was all born with a philanthropic idea, to direct all raised funds towards people in need and it warmed my heart to see how everybody strongly responded to this,” Djokovic said.

"We organized the tournament at the moment when the virus has weakened, believing that the conditions for hosting the Tour had been met. “Unfortunately, this virus is still present, and it is a new reality that we are still learning to cope and live with.”

Djokovic said he will remain in self-isolation for 14 days and also apologized to anyone who became infected as a result of the series. Organizers of the Adria Tour said the third stage of the event, scheduled to held next week in Bosnia, has been cancelled.

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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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Agencies
January 15,2020

Chandigarh, Jan 15: A man, who has killed two women over infidelity over the last 10 years was arrested from a news channel studio in Chandigarh when he confessed to these crimes during a live programme, police said.

In the television programme on News18, the 31-year-old accused, Maninder Singh, who is a cab driver, confessed killing his live-in partner, a 27-year-old nurse Sarabjit Kaur at a Chandigarh hotel on New Year's Eve.

Singh, a former murder convict and currently out on bail, also confessed about his crime committed in Karnal in 2010.

"I killed her (Sarabjit Kaur) because she was having an affair with her sister-in-law's brother," Maninder told the news channel.

Confessing his previous crime, Maninder said he had killed Renu in Karnal. "She was also having an affair with a man from Uttar Pradesh," he said.

Singh was arrested while the programme was still on air as police rushed into the studio.

Haryana Police had arrested him for killing the woman in 2010. He was convicted by a trial court, but he later got bail from the Punjab and Haryana High Court.

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