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 9,2020

New Delhi, Jan 9: JNU students who tried to march towards the Rashtrapati Bhavan on Thursday protesting the violence on the university campus were stopped by police and later detained.

The police also resorted to baton charge to control the mob who tried to block the traffic at Janpath. Using loudspeakers, the police also appealed to the crowd to maintain peace.

Before the students tried to proceed towards the Rashtrapati Bhavan, a delegation of JNU Students' Union and JNU Teachers' Association also met Human Resource Development (HRD) Ministry officials and demanded the removal of Vice-Chancellor M Jagadesh Kumar from his post.

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News Network
January 30,2020

New Delhi, Jan 30: Tension spiralled in Jamia Nagar on Thursday after a man fired a pistol at a group of anti-CAA protesters, injuring a Jamia Millia Islamia student before walking away while waving the firearm above his head and shouting "Yeh lo aazadi" amid heavy police presence in the area.

Massive protests erupted in the area after the incident with hundreds of agitated people gathering near the university, breaking barricades and clashing with police personnel.

The man, who identified himself as "Rambhakt Gopal", was subsequently overpowered by police and detained. He was taken into custody and was being interrogated, police said.

The entire drama, which triggered panic in the area, was captured by television cameras that showed the man in light coloured pants and a dark jacket, walking away on an empty road barricaded by police, turning around and shouting at the protesters in Hindi, "Here, take this freedom."

The gunman went live on Facebook before the brandishing the gun. Police said they were verifying whether it is his real name.

Before the attack, the man also put out messages on Facebook stating "Shaheen Bhag Khel Khatam" (Run Shaheen, the game is over). Another message stated, "Please wrap me in saffron in my last journey with slogans of Jai Shri Ram". His Facebook profile was deleted after screenshots of his posts were circulated widely on social media platforms.

Several students recapped how their peaceful march on Gandhi's death anniversary became violent.

"We were moving towards the Holy Family Hospital where the police had raised barricades. Suddenly, a gun-wielding man came out and opened fire. One bullet hit my friend's hand," Aamna Asif, a student of economics at the university, told PTI.

She said her friend, Shadab Farooq, a mass communication student, was trying to calm the attacker but he shot at him injuring his left hand.

Farooq, who belongs to Kashmir, was taken to the AIIMS Trauma Centre.

Ragibh Naushad, an LLB student at the university, said, "The Jamia Coordination Committee organised a march to pay homage to Gandhi ji on his death anniversary. It started at 12 noon from Gate number 7, but police denied the permission and stopped the march near the Holy Family hospital.

"A man named Gopal, came there and started brandishing a weapon and later shot a round. He was also chanting pro-CAA slogans."

The incident led to panic in the area.

Khalid Hassan, a JMI alumnus, said initially many were not sure whether it was a gunshot or a tyre burst.

There was heavy police and media presence when the incident took place.

The students were heading from Jamia to Mahatma Gandhi's memorial Rajghat. The march was stopped at the Holy Family Hospital near the university.

Chinmoy Biswal, DCP (southeast), said the students wanted to take out a march from Jamia to Rajghat but were denied permission.

"They were being repeatedly told that the protest should be carried out peacefully. We had barricaded the road just before the Holy Family hospital. Meanwhile, a person was seen in the crowd who waved something which appeared to be a weapon."

"We have detained him and are interrogating him. One person has also been injured," Biswal said.

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News Network
May 23,2020

Karachi, May 23: Ninety-seven people were killed and two survived when a passenger plane crashed into homes in Pakistan's southern city of Karachi, health officials said Saturday.

The Pakistan International Airlines (PIA) plane had made multiple approaches to land at the city's airport when it came down in a residential area, damaging buildings and sparking a rescue operation that lasted into the night.

All passengers and crew had been accounted for and the bodies of those killed had been recovered from the crash site, the Sindh Health Ministry said, adding that 19 had been identified.

A local hospital earlier reported it had received the bodies of people killed on the ground.

The site remained cordoned off on Saturday morning.

The crash sent plumes of smoke were into the air as rescue workers and residents searched the debris for people and as firefighters tried to extinguish the flames.

An AFP reporter witnessed charred bodies being loaded into ambulances.

PIA said the plane lost contact with air traffic control just after 2:30 pm (0930 GMT) travelling from Lahore to Karachi.

The disaster comes as Pakistanis prepare to celebrate the end of Ramadan and the beginning of Eid al-Fitr, with many travelling back to their homes in cities and villages.

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