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.

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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.

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Agencies
July 7,2020

India's COVID-19 tally raced past the seven lakh-mark with 22,252 fresh infections on Tuesday, five days after crossing the six lakh post, while the death toll climbed to 20,160 as 467 more people succumbed to the disease, according to the Union health ministry.

With this, the country has recorded over 20,000 cases of the infection for the fifth consecutive day.

India's coronavirus infection caseload stands at 7,19,665, the ministry's data updated at 8 am showed.

With a steady rise, the number of recoveries stands at 4,39,947, while there are 2,59,557 active cases of coronavirus infection in the country.

"Thus, around 61.13 % of patients have recovered so far," an official said.

The total number of confirmed cases also includes foreigners.

Of the 467 deaths reported in the last 24 hours, 204 are from Maharashtra, 61 from Tamil Nadu, 48 from Delhi, 29 from Karnataka, 24 from Uttar Pradesh, 22 from West Bengal, 17 from Gujarat.

Telangana and Haryana reported 11 deaths each; Madhya Pradesh nine; Andhra Pradesh seven; Jammu and Kashmir six; Rajasthan and Punjab five each; Bihar, Kerala and Odisha two each; and Arunachal Pradesh and Jharkhand one each.

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Agencies
January 16,2020

New Delhi, Jan 16: United Forum of Bank Unions has decided to observe a two-day strike on January 31 and February 1, demanding early wage revision settlement which has been due since November 1, 2017, said the All India Bank Employees Association.

Union Finance Minister Nirmala Sitharaman will present her second Union Budget on February 1.

Banks will also hold a strike on March 11, 12 and 13. Also, an indefinite strike will be held from April 1.

General Secretary, All India Bank Officers' Confederation West Bengal Sanjay Das has stated that the nationwide strike has been called over several demands.

"The demands include--wage revision settlement at 20 per cent hike on payslip components with adequate loading thereof and scrapping off New Pension Scheme (NPS)," said Das.

There are several demands to hold the strike including the merger of special allowance with basic pay, updation of pension, improvement in the family pension system, five-day banking, allocation of staff welfare fund based on operating profits and exemption from income tax on retiral benefits without a ceiling.

"Other demands include-- a uniform definition of business hours, lunch hour etc in the branches, introduction of leave bank, defined working hours for the officers and equal wage for equal work for the contract employee," said Das.

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