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 17,2020

New Delhi, May 17: Spelling out the government’s fourth tranche of initiatives towards achieving Prime Minister Narendra Modi’s vision of ‘Atmanirbhar Bharat’, Union Finance Minister Nirmala Sitharaman on Saturday announced significant structural reforms in eight sectors of the economy — coal, minerals, defense production, aviation, power distribution in Union territories, space and atomic energy.

Addressing her fourth and the second-last press conference, Sitharaman said crucial sectors such as coal production and exploration, defence production and space would see an increased participation from private entities.

Coal sector:

In the realm of coal exploration, the government has decided to liberalise the entry norms for private entities, which would mean that any interested party could bid for a coal block and sell it in the open market. The minister said that the government would do away with all the eligibility conditions at the time of bidding for a coal block, except requiring an “upfront payment with a ceiling.”

Nearly 50 coal blocks would be offered to private players immediately, revealed Sitharaman.

She further said that Rs 50,000 crore would be spent by Centre in creating ‘coal evacuation’ infrastructure, which would expedite the transport of mined product to the destination.

Defence sector:

In defence production, Sitharaman revealed that the government would raise the foreign direct investment (FDI) limit in the sector from current 49 per cent to 74 per cent. Further, the government would also work towards corporatising the ordnance factory boards. “Corporatising doesn’t amount to privatization,” added Sitharaman.

In a bid to boost indigenous production of defence products and gave an impetus to Make in India, Sitharaman said that the government was in a process of notifying a list of weapons/platforms for an import ban with year-wise timelines.

These decisions would also help in reducing huge import bills, the finance minister said.

Privatisation of electricity:

In another announcement that could have an effect on electricity charges in the union territories, Union Finance Minister Nirmala Sitharaman announced on Saturday that power departments and utilities in all the centrally administered territories would be privatised.

Sitharaman said that the proposed move would lead to better service to consumers and improvement in operational and financial efficiency in distribution.

The finance minister said that decision was guided by 'sub-optimal' utilisation of performance of power distribution and supply'.

She said that the move to that effect would provide a model for emulation by other utilities across the country, in what could be an indicator of what's in the pipeline for utilities in other states as well.

Sitharaman said that the privation reform was in line with the tariff policy reforms and would help in enhancing consumer rights, promote industry and improve the overall sustainability of the sector.

Space sector:

Sitharaman also announced the opening up of the space exploration sector for private players. Till date, the government-run Indian Space Research Organisation (ISRO) has held a monopoly on all activities concerning space exploration and satellite launches.

The Indian private sector will be a co-traveller in India's space sector journey, said Sitharaman, while announcing a series of structural reforms in eight crucial areas of the economy. The Union Finance Minister was addressing her fourth press conference in as many days, as a follow-up towards realising Prime Minister Narendra Modi's vision of 'atmanirbhar Bharat', which was spelled out in his video address on May 12.

Sitharaman said that the reforms in the space sector will provide a level-playing field for private companies in satellite launches and space-based services.

She said that the private sector would be allowed to use ISRO facilities and other assets to improve their capacities. Stating that the government would provide predictable policy and regulatory environment to private players, Sitharaman also disclosed that future projects for planetary exploration and outer space travel among others would be opened up for private entities.

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 23,2020

New Delhi, Mar 23: The total number of COVID-19 cases in the country rose to 390 on Monday after 30 fresh cases were reported.

The figure includes 41 foreign nationals and the seven deaths reported so far.

Gujarat, Bihar and Maharahstra reported a death each on Sunday, while four fatalities were reported earlier from Karnataka, Delhi, Maharashtra and Punjab, the Union Health Ministry said.

The total number of active COVID-19 cases across the country now stands at 359, while 24 people have been cured/discharged/migrated.

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
June 27,2020

LGeneva, Jun 27:: The number of confirmed coronavirus cases worldwide has risen by over 177,000 in the past 24 hours to 9.4 million and the death toll has topped 480,000, the World Health Organisation (WHO) said on Friday (local time).

On Thursday, the WHO reported 167,056 new cases and 5,336 related deaths.

The fresh daily situation report estimates the number of infections confirmed in the past 24 hours at 177,012. Further, 5,116 virus-related deaths were reported over the same period, taking the toll to 484,249.

The Americas lead the count with over 4.7 million cases, followed by Europe with more than 2.6 million.

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.