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.
Agencies
January 26,2020

New Delhi, Jan 26: Prime Minister Narendra Modi on Sunday extended his greetings to the people on the occasion of the 71st Republic Day.
"Wishing everyone a happy #RepublicDay," PM Modi tweeted in English as well as Hindi.

Celebrations will be held all across the country to mark the day.

On this day, 70-year back, India officially adopted its Constitution.

The 90-minute Republic Day ceremony will commence with Prime Minister Narendra Modi visiting the National War Memorial near the India Gate.

After paying tributes to the martyrs, the prime minister and others would head to the Rajpath.

The parade for the Republic Day will begin on Rajpath with President Ram Nath Kovind unfurling the national flag with a 21-gun salute.

Brazilian President Jair Messias Bolsonaro is the chief guest at the parade

India's military might, cultural diversity, social and economic progress will be displayed during the Republic Day celebrations.

For the first time, a contingent of women bikers of CRPF will perform daredevil stunts. The Dhanush artillery will also be displayed for the first time during the Republic Day parade.

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.
Agencies
May 15,2020

Kolkata, May 15: Veteran Bengali author Debesh Roy, who was conferred the Sahitya Akademi award for his novel 'Teesta Parer Brittanto', died at a private hospital in Kolkata on Thursday, his family members said.

Roy was 84 and he is survived by his son. His wife had died earlier.

He was admitted to the hospital near his residence at Baguihati, in the eastern fringes of the city, on Wednesday after having symptoms like sodium potasium imbalance, sugar problem and breathing problem, his family members said.

He suffered a massive cardiac arrest and died at 10.50 PM.

A regular contributor to a number of Bengali dailies, he was a staunch critic of the attacks on liberals by in the country in recent times and attended protest meetings despite his failing health.

He was born in Pabna in present-day Bangladesh on December 17, 1936. He had five decades of career as a writer.

Besides Teesta Parer Britanta', he will be remembered for books like Borisaler Jogen Mondal , Manush Khun Kore Keno and Samay Asamayer Brittanto . His first book was Jajati.

His last rites will be performed tomorrow.

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 14,2020

New Delhi, Jan 14: The curative petitions of Vinay Sharma and Mukesh, who were sentenced to death in the Nirbhaya gang rape and murder case, was on Tuesday rejected by a five-judge Supreme Court Bench led by Justice N.V. Ramana.

In a three-page order, the Bench concluded, after an in chamber consideration that began about 1.45 p.m., that there was no merit in their pleas to spare them from the gallows.

“We have gone through the curative petitions and relevant documents. In our opinion, no case is made out within the parameters indicated in the decision of this Court in Rupa Ashok Hurra versus Ashok Hurra. Hence, the curative petitions are dismissed,” the court held.

Curative is a rare remedy devised by a Constitution Bench of the Supreme Court in its judgment in the Rupa Ashok Hurra case in 2002. A party can take only two limited grounds in a curative petition - one, he was not heard by the court before the adverse judgment was passed, and two, the judge was biased. A curative plea, which follows the dismissal of review petition, is the last legal avenue open for convicts in the Supreme Court. Sharma was the first among the four convicts to file a curative.

The Bench also rejected their pleas to stay the execution of their death sentence and for oral hearing in open court.

Besides Justice Ramana, the Bench comprised Arun Mishra, Rohinton Nariman, R. Banumathi and Ashok Bhushan.

Curative petitions were filed in the Supreme Court by both convicts on January 9. The petitions had come just days after a Delhi sessions court schedulled the execution of all the four convicts in Tihar jail on January 22.

Sharma and Mukesh, in separate curative petitions, argued that there was a “sea change” in the death penalty jurisprudence since their convictions. Carrying out the death sentence on such changed circumstances would be a “gross miscarriage of justice”.

In his plea, Sharma said the Court had commuted the death penalty in several rape and murder cases since 2017, when it first confirmed the death penalty to the Nirbhaya convicts.

“fter the pronouncement of judgment in 2017, there have been as many as 17 cases involving rape and murder in which various three-judge Benches of the Supreme Court have commuted the sentence of death,” the petition contended.

The Supreme Court recently dismissed a review petition filed by Akshay Singh, another of the four four condemned men, to review its May 5, 2017 judgment confirming the death penalty. It also refused his plea to grant him three weeks' time to file a mercy petition before the President of India.

A Bench led by Justice R. Banumathi had said it was open for the Nirbhaya case convicts to avail whatever time the law prescribes for the purpose of filing a mercy plea.

Akshay (33), Mukesh (30), Pawan Gupta (23) and Sharma (24) had brutally gang-raped a 23-year-old paramedical student in a moving bus on the intervening night of December 16-17, 2012. She died of her injuries a few days later.

The case shocked the nation and led to the tightening of anti-rape laws. Rape, especially gang rape, is now a capital crime.

One of the accused in the case, Ram Singh, allegedly committed suicide in the Tihar jail. A juvenile, who was among the accused, was convicted by a juvenile justice board. He was released from a reformation home after serving a three-year term.

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.