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
February 6,2020

Washington, Feb 6: The US has expressed concern over the current situation of religious freedom in India and raised the issue with Indian officials, a senior State Department official has said.

The remarks came in the wake of widespread protests held across India against the Citizenship Amendment Act (CAA).

The senior State Department official, on condition of anonymity, said that he has met with officials in India about what is taking place in the nation and expressed concern.

"We are concerned about what's taking place in India. I have met with the Indian foreign minister. I've met with the Indian ambassador (to express my concern)," the official, who was recently in India, told reporters on Wednesday.

The US has also "expressed desire first to try to help and work through some of these issues", the official said as Secretary of State Mike Pompeo launched a 27-nation International Religious Freedom Alliance.

"To me, the initial step we try to do in most places is say what can we do to be of help you work through an issue to where there's not religious persecution. That's the first step, is just saying can we work with you on this," the official said.

India maintains that the Indian Constitution guarantees fundamental rights to all its citizens, including its minority communities.

It is widely acknowledged that India is a vibrant democracy where the Constitution provides protection of religious freedom, and where democratic governance and rule of law further promote and protect fundamental rights, a senior official of the Ministry of External Affairs has said.

According to the CAA, members of Hindu, Sikh, Buddhist, Jain, Parsi and Christian communities who have come from Pakistan, Bangladesh and Afghanistan till December 31, 2014 following religious persecution there will get Indian citizenship.

The Indian government has been emphasising that the new law will not deny any citizenship rights, but has been brought to protect the oppressed minorities of neighbouring countries and give them citizenship.

Defending the CAA, Prime Minister Narendra Modi last month said that the law is not about taking away citizenship, it is about giving citizenship.

"We must all know that any person of any religion from any country of the world who believes in India and its Constitution can apply for Indian citizenship through due process. There's no problem in that," he said.

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News Network
January 10,2020

New Delhi, Jan 10: An IPS officer's thumb was bitten by a woman protester when he was pushing back agitators, who were trying to march towards the Rashtrapati Bhawan here on Thursday, police sources said.

The protesters had gathered after a call was given by JNU Students' Union president Aishe Ghosh to march towards President's House to demand the removal of University's Vice Chancellor, M Jagadesh Kumar.

Ingit Pratap Singh, a 2011 batch officer, who is currently posted as the additional deputy commissioner of the southwest district, was injured in the attack.

According to sources, Singh was trying to pull a male protester when the woman, in a bid to shield her friend, bit Singh's left thumb.

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News Network
January 8,2020

Meerut, Jan 8: Hangman Pawan Jallad, who officials say is being considered to carry out the execution of the four Nirbhaya gangrape case convicts, on Tuesday said he is ready for the job which will send out a strong message in the society.

He said executing those who were involved in the horrific crime will bring "great relief" to him, Nirbhaya's parents and everybody else.

Earlier in the day, a Delhi court issued death warrants against all the four convicts in the Nirbhaya gangrape-murder case and ordered that they are hanged on January 22 at 7 am in Tihar jail.

The death warrant, also known as a black warrant, addressed to the office of the Tihar jail chief, was issued by Additional Sessions Judge Satish Kumar Arora against Mukesh (32), Pawan Gupta (25), Vinay Sharma (26) and Akshay Kumar Singh (31).

"I do not have any information regarding the execution, nobody has spoken to me yet. If anyone approaches me, I am ready to do the job. Earlier, I was asked to be ready for the execution on December 16," Pawan Jallad told reporters here.

"Those who were involved in this brutal incident must be hanged, which will send out a strong message in the society," he said.

"Hanging the Nirbhaya gangrape case convicts will certainly bring great relief to me, her parents and everybody else," he added.

Nirbhaya, a 23-year-old paramedic student, was gang-raped and brutalised on the intervening night of December 16-17, 2012, inside a moving bus in south Delhi by the four men, along with two others, before being dumped on the road.

She died on December 29, 2012, at Mount Elizabeth Hospital in Singapore.

Of the six persons convicted, one allegedly committed suicide in jail and another, a juvenile, was released from a reformation home after serving a three-year term.

When contacted, Jail Superintendent of Meerut prison V P Pandey said he has not yet received any letter from Tihar authorities.

"Last month, we had received a letter asking us to keep Pawan Jallad ready but there is no fresh communication. The Delhi court warrants were issued this evening, maybe we will get the letter for sending him by tomorrow (Wednesday)," he said.

The gangrape of 23-year-old, who came to be known as 'Nirbhaya', the fearless one, sparked outrage across the country. Repulsed, people took to the streets across the country, demanding justice for her and better safety measures for women.

The case led to toughening of India's rape laws.

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