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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News Network
January 7,2020

Mumbai, Jan 7: People protesting against the JNU violence were evicted from Gateway of India here on Tuesday morning as roads were getting blocked and tourists and common people were facing problems, a police official said.

Police had appealed to the protesters to shift but they didn't listen, so they were "relocated" to Azad Maidan, the official said.

Hundreds of people, including students, women and senior citizens - who assembled at the iconic Gateway of India since Sunday midnight - demanded action against the culprits and called for Union Home Minister Amit Shah's resignation.

Violence broke out in the Jawaharlal Nehru University (JNU) in Delhi on Sunday night as masked men armed with sticks and rods attacked students and teachers and damaged property on the campus.

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News Network
March 3,2020

New Delhi, Mar 3: Delhi's Tihar Prison authorities had made all necessary preparations for the hanging of four convicts in the Nirbhaya gangrape-and-murder case which was scheduled for Tuesday, officials said Monday.

However, on Monday evening, a city court deferred the hanging till further orders.

Postponing the execution, Additional Sessions Judge Dharmender Rana said the hanging cannot be carried out pending disposal of Pawan Gupta's mercy plea before the President, observing any condemned convict must not meet his "Creator" with grievance against courts for not acting fairly on the opportunity to exhaust legal remedies.

"We had made all the necessary arrangements for the execution of the four convicts which was scheduled for Tuesday at 6 AM. Now, the execution has been postponed and we are waiting for the further order by the court," a senior jail official said.

The hanging of the four men -- Mukesh Kumar Singh (32), Vinay Kumar Sharma (26), Akshay Kumar Singh (31) and Pawan -- who are lodged in Tihar jail, was fixed for March 3 in Tihar jail on a court order.

"We had checked the ropes. Hangman was called and dummy executions were carried out," another senior jail official said.

Barring Pawan, the other three had in the previous weeks moved curative petitions and mercy pleas which were all dismissed.

The first date of execution -- January 22 -- fixed on January 7 was postponed by the court to February 1. But on January 31, the court indefinitely postponed the hanging. On February 17, the court again issued fresh date for execution of death warrants for March 3 at 6 AM.

The court in its orders observed that the four convicts cannot be hanged since a mercy plea of one or the other convict was pending.

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Agencies
May 7,2020

A patient in hospital with Covid-19 has given birth to a healthy baby boy in Dubai.

The 25-year-old Indian was admitted to Al Zahra Hospital after testing positive on May 2.

Although the baby was not due to arrive until May 19, the woman went into labour three days later and delivered a healthy boy weighing 3.8kg.

The parents are yet to name the child, who has also been tested for the virus.

“When we first received the Covid-19 positive diagnosis, we were afraid for the health of both my wife and the baby,” said the boy’s father, who did not want to give his name.

“Thankfully with the help of the doctors and nurses at Al Zahra Hospital, my son was born with no complications and my wife remains in stable condition.

“We couldn’t be more grateful.”

Despite arriving two weeks early, both mother and child are doing well but will only be allowed to leave the hospital to return to their home in Dubai after they return three negative tests on the trot.

“The contractions started very suddenly and it all happened very quickly,” said Al Zahra Hospital nursing director Maysoon Yousef.

“The delivery took about 10 to 15 minutes which is something we do not see very often.

“There were no complications and both the mother and baby are in good condition.”

Strict measures are in place to ensure hygiene for those inside the hospital, as well as visitors.

The new mum and her son are in the same room as the baby needs to be nursed.

According to the Centres for Disease Control and Prevention, a US national public health institute, there is no evidence that suggests the virus can be transmitted through breastfeeding.

New mothers infected with the virus should wear a mask, wash their hands before and after touching the baby.

“We operate by the latest Covid-19 international and local guidelines when it comes to the management of our maternity patients and otherwise,” said Dr Ghassan Lutfi, head of obstetrics and gynaecology at the hospital.

“We take strict measures to guarantee that there is no risk of cross contamination and that all our patients are in safe hands.”

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