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 2,2020

United Nations, Jan 2: Nearly 400,000 babies were born around the world on New Year's Day with India recording the highest number of these births worldwide at 67,385, the UN children's agency said.

An estimated 392,078 babies were born around the world on New Year's Day, according to UNICEF. Of this, an estimated 67,385 babies were born in India, the most globally. China comes in second with 46,299 births.

The beginning of a new year and a new decade is an opportunity to reflect on our hopes and aspirations not only for our future, but the future of those who will come after us,” UNICEF Executive Director Henrietta Fore said.

As the calendar flips each January, we are reminded of all the possibility and potential of each child embarking on her or his life's journey—if they are just given that chance.”

Fiji in the Pacific most likely delivered 2020's first baby, while the US, the last of the New Year's Day. Globally, over half of these births were estimated to have taken place in eight countries - India (67,385), China (46,299), Nigeria (26,039), Pakistan (16,787), Indonesia (13,020), United States of America (10,452), Democratic Republic of Congo (10,247) and Ethiopia (8,493).

Each January, UNICEF celebrates babies born on New Year's Day, an auspicious day for child birth around the world, it said. However, for millions of newborns around the world, the day of their birth is far less auspicious.

In 2018, 2.5 million newborns died in just their first month of life; about a third of them on the first day of life. Among those children, most died from preventable causes such as premature birth, complications during delivery, and infections like sepsis. In addition, more than 2.5 million babies are born dead each year.

UNICEF said over the past three decades, the world has seen remarkable progress in child survival, cutting the number of children worldwide who die before their fifth birthday by more than half. But there has been slower progress for newborns. Babies dying in the first month accounted for 47 per cent of all deaths among children under five in 2018, up from 40 per cent in 1990.

UNICEF's Every Child Alive campaign calls for immediate investment in health workers with the right training, who are equipped with the right medicines to ensure every mother and newborn is cared for by a safe pair of hands to prevent and treat complications during pregnancy, delivery and birth.

Too many mothers and newborns are not being cared for by a trained and equipped midwife or nurse, and the results are devastating,” said Fore. “We can ensure that millions of babies survive their first day and live into this decade and beyond if every one of them is born into a safe pair of hands.”

India is projected to surpass China as the world's most populous country around 2027. According to UN estimates, India is expected to add nearly 273 million people between 2019 and 2050, while the population of Nigeria is projected to grow by 200 million. Together, these two countries could account for 23 per cent of the global population increase to 2050.

China, with 1.43 billion people in 2019, and India, with 1.37 billion, have long been the two most populous countries of the world, comprising 19 and 18 per cent, respectively, of the global total in 2019. Through the end of the century, India is estimated to remain the world's most populous country with nearly 1.5 billion inhabitants, followed by China with just under 1.1 billion, Nigeria with 733 million, the US with 434 million, and Pakistan with 403 million inhabitants.

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News Network
June 10,2020

Chennai, Jun 10: DMK MLA J Anbazhagan who had tested positive for coronavirus and was on ventilator support from June 3 passed away at a hospital in Chennai on Wednesday.

Coincidently, today is the 62nd birthday of the MLA.

"Anbazhagan J, who has been fighting for his life with severe COVID 19 pneumonia rapidly deteriorated early this morning. In spite of full medical support including mechanical ventilation at our COVID facility, he succumbed to his illness. He was declared dead at 08:05 hours on the 10th of June 2020," the hospital said in a statement.

In 2001, Anbazhagan was elected from T Nagar Assembly constituency. He served for five years.

Later in 2011, he was elected to Tamil Nadu Assembly from Chepauk-Thiruvallikeni seat. The DMK leader was re-elected from the same constituency in 2016.

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News Network
July 3,2020

Kanpur,  Jul 3: A total of eight police personnel including Deputy Superintendent of Police Devendra Mishra have lost their lives after they were fired upon by criminals in the early hours of Friday.

The incident took place when a police team had gone to raid history-sheeter Vikas Dubey's house.

Senior Superintendent of Police and Inspector General of Police have reached the spot and forensics team is examining the area.

State Chief Minister Yogi Adityanath has expressed his condolence to the families of the eight Police personnel who lost their lives after being fired upon by criminals in Kanpur. He has directed Director General of Police HC Awasthi to take strict action against criminals. He also sought a report of the incident. 

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