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 12,2020

New Delhi, Mar 12: TMC MP Saugata Roy said Home Minister Amit Shah should resign for "failing" to control the riots in Delhi and demanded a judicial inquiry by a sitting Supreme Court judge.

Participating in a discussion on the violence in Delhi in Lok Sabha, Roy said the Delhi riots happened 72 years after Mahatma Gandhi was killed by a Hindu fanatic.

"Gandhiji has been murdered again in Delhi by, you know who," Roy said while addressing the Chair.

Taking on BJP MP Meenakshi Lekhi for defending BJP leaders for their controversial remarks, which he claimed instigated the violence, Roy said he has seldom heard such a communal speech ever.

Dubbing the BJP MP as "Devil's Advocate", Roy said, "She spent five minutes defending the most hated man. May I quote (William) Shakespeare and call her the Devil's Advocate?...She is the best Devil's Advocate possible. She has also been an advocate for the Delhi Police which has shown total inaction and ineptness in this whole riot in Delhi."

Thereafter Roy trained his gun at Shah, who was present in the house while the TMC MP was speaking.

He said that when the riots started on February 24, Home Minister Shah was sitting in the front row at Motera Stadium (in Gujarat) welcoming US President Donald Trump.

"When Mr. Shah should have been in Delhi Police control room, he was welcoming Mr. Trump at Motera. There was no order to the police. Then on 25th, things went out of control. Armed mobs fought with each other on the streets of Delhi," Roy said.

Demanding resignation of Shah, Roy raised questions on NSA Ajit Doval's visit to the riots-affected areas on February 26 and asked what was the Home Minister doing.

"Is it NSA's business to control ordinary law and order situation? Why was the Home Minister absent in action? There is no explanation for the same," he said.

The TMC leader said he feels bad standing face-to-face with Shah.

"He is still young, he has a good future. He should acknowledge responsibility for his failure to control or stop Delhi riots and bring peace in three days. In the name of God, go and do not stay in the Home Minister's position," Roy said, adding he is the man who could not prevent riots in Delhi, at a place 10 kilometres away from the Home Ministry.

Roy demanded a judicial inquiry into the riots by a sitting Supreme Court judge and complete rehabilitation for all the riot victims.

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Agencies
January 10,2020

Indian enterprises were flooded with a whopping 14.6 crore malware threats in 2019 - a growth of 48 per cent (year-on-year) compared to 2018, a new report said on Friday.

Manufacturing, BFSI (banking, financial services and insurance), education, healthcare, IT/ITES, and the government were the most at-risk industries in the country, said the report from Seqrite, the enterprise arm of Pune-based IT security firm Quick Heal Technologies.

Interestingly, almost a quarter (23 per cent) of the threats were identified through 'Signatureless behaviour-based' detection by Seqrite, indicating how a growing number of cybercriminals were deploying new or previously unknown threat vectors to compromise enterprise security.

"With the latest Seqrite annual threat report, we want to empower CIOs, CISOs, business leaders and all key public stakeholders with the insights they need to combat the growing complexity of the threat landscape," said Sanjay Katkar, Joint Managing Director and CTO, Quick Heal Technologies.

The most prominent trend was the drastic increase in the volume, intensity, and sophistication of cyber-attack campaigns targeting Indian enterprises in 2019.

The rapid integration of IoT devices, BYOD (bring your own device), and third-party APIs into enterprise networks has created newer security vulnerabilities that might go unnoticed until a major breach occurs.

Threat researchers at Seqrite observed several large-scale advanced persistent threats (APT) attacks deployed against organisations in the government sector.

"The entry of nation-states and organised cybercrime cells into the fray is expected to add more complication to this situation and will require Indian government bodies and corporate enterprises to shore up their cyber defence strategies in 2020 and beyond," the report noted.

More alarming, however, was the continued lack of security awareness amongst enterprises and government organisations.

"Unsecured Remote Desktop Protocol (RDP) and Server Message Block (SMB) protocols continued to be targeted through brute-force attacks," said the report.

Spear phishing attack campaigns leveraging Office exploits and infected macros were also used extensively by cybercriminals to gain access to enterprise networks and steal critical data.

"India's digital journey depends on ensuring robust cybersecurity for all stakeholders within the enterprise ecosystem," said Katkar.

The sharp spike should be a cause of concern for CIOs and CISOs in the country, especially given the growing digital penetration within their enterprise networks.

"With network vulnerabilities and potential entry points increasing at a rapid pace, threat actors are expected to leverage artificial intelligence (AI) capabilities to power their malware campaigns in the future to capitalise on newer attack vectors," the report added.

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News Network
February 19,2020

New Delhi, Feb 19: Delhi Chief Minister Arvind Kejriwal met Union Home Minister Amit Shah on Wednesday, their first meeting after the assembly polls in the national capital.

The meeting went on for over 20 minutes at Shah's residence. The meeting was earlier scheduled at the Home Ministry.

"Met Hon'ble Home Minister Sh Amit Shah ji. Had a very good and fruitful meeting. Discussed several issues related to Delhi. Both of us agreed that we will work together for development of Delhi," Kejriwal tweeted.

Shah had led the BJP offensive against Kejriwal in the Delhi Assembly polls in which AAP trounced the saffron party, bagging 62 of the 70 seats.

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