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
March 11,2020

New Delhi, Mar 11: Congress leader Rahul Gandhi on Wednesday accused Prime Minister Narendra Modi of “destabilising” the elected Congress government in Madhya Pradesh.

Gandhi also said the PM may have “missed” noticing the 35 per cent crash in global oil prices and asked him to pass on the benefit to Indians by slashing petrol prices.

“Hey @PMOIndia, while you were busy destabilising an elected Congress Govt, you may have missed noticing the 35 per cent crash in global oil prices.

“Could you please pass on the benefit to Indians by slashing #petrol prices to under 60 per litre? Will help boost the stalled economy,” the former Congress chief said on twitter.

Congress' prominent youth leader Jyotiraditya Scindia quit the party on Tuesday and appeared set to join the BJP amid a rebellion in Madhya Pradesh by his supporters, pushing the 15-month-old Kamal Nath government to the brink of collapse.

On Tuesday morning, as much of India was celebrating Holi, Scindia met senior BJP leader and Union Home Minister Amit Shah, following which he called on Prime Minister Narendra Modi at his 7, Lok Kalyan Marg residence.

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News Network
March 6,2020

Mumbai, Mar 6: Harried Yes Bank depositors rushed to ATMs to withdraw cash but faced multitude of problems including closed down machines and long queues, after the RBI placed the bank under a moratorium, capping maximum withdrawals at Rs 50,000 per account for a month.

Aggravating the problems of depositors were difficulties accessing the internet banking channel, which ensured that they can't transfer the funds online as well. At an ATM in south Mumbai's Horniman Circle, with the RBI headquarters overlooking it, the shutters were pulled down.

The guard on duty said the machine was non-operational before he reported to work late in the evening and he was ordered to shut it after 2200 hrs. In the residential area of suburban Chembur, one ATM was dispensing cash but had a long queue of anxious depositors.

One man said it was still possible to withdraw up to Rs 50,000 in multiple transactions from the machine.

However, another machine nearby had run dry within minutes of the RBI announcement, a woman said.

The regulatory actions, undertaken by the RBI and the government, came hours after finance ministry sources confirmed that SBI was directed to bail out the troubled lender.

For the next month, Yes Bank will be led by the RBI-appointed administrator Prashant Kumar, an ex-chief financial officer of SBI.

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Agencies
January 11,2020

New Delhi, Jan 11: Senior Congress leader P Chidambaram on Friday said that he has never seen innocents like the Indian people, who believe the claims made by the government on the implementation of its programmes. The former Union Minister, addressing a literary event, said, "I have never seen innocents like the Indian people. If something appears on print (and named two newspapers also), we believe it. We believe anything."

Claims like all villages having been electrified in the country and toilets built for 99 per cent of families in India were being believed, he said.

Similar was the case of the Ayushman Bharat scheme, (Pradhan Mantri Jan Arogya Yojana or PM-JAY is a flagship health care scheme of the Centre), he alleged.

Stating that his Delhi-based driver's father had to get a surgery done under the scheme, he said, however, it could not be performed.

"I asked him (car driver) if he had the Ayushman card and he showed a card and I told him to take it (to hospital). In hospital after hospital, they said they were not aware of anything like that (Ayushman scheme). But we believe that the Ayushman scheme has come to the whole of India," he said.

Further, he said "we believe that for any disease, treatment will be done (indicating the Ayushman scheme) without shelling out money. We are being innocents."

Many news items and data were contrary to the truth, he added.

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