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.

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
February 3,2020

New Delhi, Feb 3: In the third such incident inside of a week, two unidentified persons opened fire outside Gate No. 5 of Jamia Millia Islamia on Sunday night, the Jamia Coordination Committee (JCC) said.

A statement issued by the committee, a group comprising students and alumni of the university formed to protest against the Citizenship Amendment Act, said the attackers were on a red Rcooty.

No one was injured in the attack. One of the miscreants was wearing a red jacket, the statement said.

"Firing has taken place at Gate No.5 of Jamia Millia Islamia right now by two unidentified persons. As per report, one of them was wearing a red jacket and driving a red Scooty having vehicle no. 1532 or 1534," the statement said.

Police said they were verifying the JCC's claims.

Asim Mohammed Khan, former Congress MLA from Okhla, said the incident occurred around 11.30 pm. "We heard the gunshot. That is when we stepped out to see and the two men left on a Scooty," a student said.

"We have taken down the vehicle number and called police," he added.

This is the third firing incident in the Jamia Nagar area in a week.

On Thursday, a minor fired at anti-CAA protesters marching towards Rajghat, injuring a student.

Two days later, a 25-year-old fired two rounds in air in Shaheen Bagh in Jamia Nagar. No one was hurt in the incident.

The incident on Sunday night triggered panic in the area. A police vehicle had reached the spot after the incident but was chased away by angry students.

Hundreds of students and locals gathered outside the university.

Many raised slogans against the Delhi Police. They also staged a dharna outside the Jamia Nagar police station.

Shezad Ahmed, a JMI student and resident of Zakir Nagar, said they were not even allowed to protest peacefully.

"We are not going to be deterred by such incidents. We will continue with our protest," he added.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
March 4,2020

Mar 4: Twenty-one Italian tourists and three Indian tour operators have been sent to an ITBP quarantine facility in Delhi on Tuesday for suspected coronavirus exposure, official sources said.

Health Ministry sources said these foreigners, 13 women and eight men, were in the same group of which an Italian and his wife have tested positive in Rajasthan capital Jaipur.

“His (Italian in Jaipur) condition is stable,” a source said.

Three Indians, who were accompanying this Italian group as tour operators, have also been sent to the ITBP facility in Chhawla area of south-west Delhi, they said.

All these people, staying at a five-star hotel in south Delhi, have been put in “preventive isolation” at the ITBP camp and their samples will be taken on Wednesday, sources said.

The centre already has 112 people, 76 Indians and 36 foreigners, since February 27 after they were evacuated by an IAF plane from Wuhan in China, the epicentre of the coronavirus.

The first samples of these 112 people had tested negative when reports came in last week.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
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.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.