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
June 21,2020

New Delhi, June 21: Diesel prices rise to record high after 60 paise hike in rates, petrol up 35 paise; rates up by Rs 8.88 and Rs 7.97 in 15 days.

Petrol price in Delhi was hiked to Rs 79.23 per litre from Rs 78.88, while diesel rates were increased to Rs 78.27 a litre from Rs 77.67, according to a price notification of state oil marketing companies. 

In Bengaluru, petrol will be costlier by 37 paise at Rs 81.81 per litre, while diesel will cost 57 paise more per litre at Rs 74.43.

Rates have been increased across the country and vary from state to state depending on the incidence of local sales tax or VAT.

The 15th daily increase in rates since oil companies on June 7 restarted revising prices in line with costs after ending an 82-day hiatus in rate revision, has taken diesel prices to a new high. The petrol price too is at a two-year high.

Over 63 per cent of the retail selling price of diesel is taxes. Out of the total tax incidence of Rs 49.43 per litre, Rs 31.83 is by way of central excise and Rs 17.60 is VAT. 

Petrol in Mumbai costs Rs 86.04 per litre and diesel is priced at Rs 76.69.

Prior to the current rally, the peak diesel rates had touched was on October 16, 2018 when prices had climbed to Rs 75.69 per litre in Delhi. The highest-ever petrol price was on October 4, 2018 when rates soared to Rs 84 a litre in Delhi.

When rates had peaked in October 2018, the government had cut excise duty on petrol and diesel by Rs 1.50 per litre each. State-owned oil companies were asked to absorb another Re 1 a litre to help cut retail rates by Rs 2.50 a litre.

Oil companies had quickly recouped the Re 1 and the government in July 2019 raised excise duty by Rs 2 a litre.

The government on March 14 hiked excise duty on petrol and diesel by Rs 3 per litre each and then again on May 5 by a record Rs 10 per litre in case of petrol and Rs 13 on diesel. The two hikes gave the government Rs 2 lakh crore in additional tax revenues.

Oil PSUs Indian Oil Corp (IOC), Bharat Petroleum Corp Ltd (BPCL) and Hindustan Petroleum Corp Ltd (HPCL), instead of passing on the excise duty hikes to customers, adjusted them against the fall in the retail rates that was warranted because of a decline in international oil prices to two-decade lows.

International oil prices have since rebounded and oil firms are now adjusting retail rates in line with them.

In 15 days of hike, petrol price has gone up by Rs 7.97 per litre and diesel by Rs 8.88 a litre.

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
July 2,2020

Geneva, Jul 2: The World Health Organization (WHO) has estimated the overall number of coronavirus cases globally at 10,357,662, with 508,055 people having died from the disease.

The UN health agency said in the situation report published on late Wednesday that 163,939 new cases had been recorded in the past day, while further 4,188 patients had died.

Americas continue to lead the count with over 5.2 million cases, followed by Europe with more than 2.7 million.

The WHO declared the COVID-19 outbreak a pandemic on March 11.

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
July 17,2020

Lukung, Jul 17: Union Defence Minister Rajnath Singh on Friday assured that not an inch of our land can be taken by any power in the world while he interacted with the Indian Army and ITBP personnel at Lukung.

Referring to the India-China border standoff, he said, "Talks are underway to resolve the border dispute but to what extent it can be resolved I cannot guarantee. I can assure you, not one inch of our land can be taken by any power in the world."

Emphasising on finding a diplomatic solution to the standoff, he further said, "If a solution can be found by talks, there is nothing better."
"Recently what happened between troops of India and China at PP14, how some of our personnel sacrificed their lives protecting our border. I am happy to meet you all but also saddened because of their loss. I pay my tributes to them," he added.

Singh interacted with the Army and Paramilitary troops here along with Chief of Defence Staff General Bipin Rawat and Army Chief General MM Naravane.

Earlier today, the Defence Minister witnessed para dropping and scoping weapons here. He also inspected a Pika machine gun.

Indian Army T-90 tanks and BMP infantry combat vehicles carried out the exercise at Stakna, Leh in presence of Singh, Chief of Defence Staff and Army Chief.

Defence Minister is on a two-day visit to Ladakh and Jammu and Kashmir. He will take stock of the situation at both the Line of Actual Control (LAC) and the Line of Control (LOC).

While Pakistan constantly violates ceasefire from across the LoC, China has continued to intrude into Indian territory in Ladakh region in recent past, escalating tensions between India and its eastern neighbour.

On June 15, twenty Indian soldiers laid out their lives during combat with Chinese forces in Galwan valley, leading to tensions between both nations. Chinese soldiers subsequently started moving back following dialogues between two countries through the military level and diplomatic level.

Singh was accompanied by the Chief of Defence Staff General Bipin Rawat and Army Chief General MM Naravane.

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.