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
May 10,2024

AKejrival.jpg

The Supreme Court Friday granted interim bail to Delhi Chief Minister Arvind Kejriwal till June 1 in the excise policy case.

The top court, however, stated that it will be passing a detailed order over the matter soon.

On Thursday, the Enforcement Directorate had opposed the move to grant interim bail to Kejriwal saying that “any special concession” to him will “amount to anathema to the rule of law and equality… thereby creating two separate classes in the country viz. ordinary people, who are bound by the rule of law as well as the laws of the country, and politicians who can seek exemption from the laws”.

The ED had arrested Kejriwal on March 21 in the excise policy case.

“The right to campaign for an election is neither a fundamental right nor a constitutional right and not even a legal right,” the ED said, maintaining that to its knowledge, “no political leader has been granted interim bail for campaigning even though he is not the contesting candidate”.

After the ED filed its affidavit, the AAP, in a press release, said, “The legal team of Delhi Chief Minister and AAP National Convenor, Shri Arvind Kejriwal, has raised strong objection to the affidavit filed by the Enforcement Directorate opposing interim bail in the Supreme Court.”

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
May 7,2024

damudupi.jpg

Udupi: Udupi became the second city on the Karnataka coast after Mangaluru to launch water rationing, a senior official said on Tuesday.

Commissioner of the Udupi City Municipal Corporation Rayappa said that the rationing system will come into force from Wednesday and will continue till the water in the reservoir reaches comfortable levels.

The dam built across the Swarna river at a place called Baje, which is the only source of water for Udupi city, recorded 3.25 meters of water as against the top level of 6.30 meters.

The decision of water rationing will be reviewed periodically until the reservoir regains its fullest levels, the official said.

The Mangaluru City Corporation resorted to water rationing on Saturday following declining water levels in the reservoir built across the Nethravati river at Thumbe. 

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
May 5,2024

kangana.jpg

New Delhi, May 5: Actor-turned-politician Kangana Ranaut intended to target an opposition leader but mistakenly ended up attacking her BJP colleague instead. 

A similarity in names - Tejashwi and Tejasvi - was behind Ms Ranaut's fumble. "There's a party of spoilt princes... whether it's Rahul Gandhi who wants to grow potatoes on the Moon, or Tejasvi Surya who does hooliganism and eats fish," she had said.

RJD leader and former Bihar deputy Chief Minister Tejashwi Yadav was supposed to be the original target of her diatribe as one of his videos where he was seen eating fish became a major flashpoint between the BJP and the opposition recently.

Tejasvi Surya, incorrectly referred to by Ms Ranaut during an election rally yesterday, is BJP's Lok Sabha candidate from Bengaluru South constituency in Karnataka.

Meanwhile, Mr Yadav has responded to a clip of Kangana Ranaut's statement. "Ye mohtarma kaun hai?" (Who is this lady?), he posted on X.

Kangana Ranaut has been verbally bashing the Congress party since the BJP fielded her as their Lok Sabha candidate from Himachal Pradesh's Mandi. Congress leaders Vikramaditya Singh - her opponent in Mandi - and Rahul Gandhi have been the main targets on her dartboard.

While addressing a public rally in the Sundernagar area of Mandi Parliamentary Constituency yesterday, Ms Ranaut took a jibe at Mr Singh and Mr Gandhi over dynasty politics and said that both of them have a magic stick for development and talk only about non-practical things.

The Congress hit back saying the 37-year-old actor should first check the facts about her party leaders and speak about dynastic politics. National Media Coordinator for the Congress, Amrit Kaur, also questioned her qualifications on which she got a BJP ticket from Mandi.

The Mandi Lok Sabha constituency will go to polls on June 1, in the seventh phase of the 2024 Lok Sabha elections.

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.