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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News Network
July 14,2020

New Delhi, Jul 14: India's COVID-19 tally breached the 9 lakh mark as 28,498 new coronavirus cases were reported in the last 24 hours, informed the Union Ministry of Health and Family Welfare on Tuesday.

As per the Health Ministry, there are a total of 9,06,752 coronavirus cases in the country of which 3,11,565 patients are active cases.

5,71,459 patients have been cured/discharged while one patient has been migrated, the Ministry informed further.

553 more deaths due to COVID-19 were reported in the last 24 hours in the country, taking the number of patients succumbing to the virus to 23,727.

The Centre further informed that India's recovery rate from COVID-19 stands at 63.02 per cent while the recoveries and deaths ratio stood at 96.01 per cent and 3.99 per cent respectively.

As per the Ministry, Maharashtra -- the worst-affected state from the infection -- has a total of 2,60,924 COVID-19 cases and 10,482 fatalities. While Tamil Nadu has a tally of 1,42,798 cases and 2,032 deaths due to COVID-19.

Delhi has reported a total of 1,13,740 cases and 3,411 deaths due to COVID-19.

As per the information provided by the Indian Council of Medical Research (ICMR) 1,20,92,503 samples have been tested for COVID-19 till July 13, of these 2,86,247 samples were tested on Monday.

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Agencies
February 27,2020

Feb 27: With the window to submit comments on India's proposed personal data protection law closing on Tuesday, a period of anxious wait for final version of the Bill started for social media firms.

This comes even as global Internet companies have called on the government for improved transparency related to intermediary Guidelines (Amendment) Rules and allay fears about the prospect of increased surveillance and prompting a fragmentation of the Internet in India that would harm users.

As per the proposed amendments, an intermediary having over 50 lakh users in the country will have to be incorporated in India with a permanent registered office and address.

When required by lawful order, the intermediary shall, within 72 hours of communication, provide such information or assistance as asked for by any government agency or assistance concerning security of the state or cybersecurity.

This means that the government could pull down information provided by platforms such as Wikipedia, potentially hampering its functioning in India.

In the open letter to IT Minister Ravi Shankar Prasad, leading browser and software development platform like Mozilla, Microsoft-owned GitHub and Cloudflare earlier called for improved transparency by allowing the public an opportunity to see a final version of these amendments prior to their enactment.

According to a Business Insider report, Indian users may lose access to Wikipedia if the new intermediary rules for internet and social media companies are approved.

Since the rules would require the website to take down content deemed illegal by the government, it would require Wikipedia to show different content for different countries.

Anusha Alikhan, senior communications director for Wikimedia told Business Insider that the platform is built though languages and not geographies. Therefore, removing content from one country, while it is still visible to other country users may not work for the company’s model.

India is one of Wikipedia’s largest markets. Over 771 million Indian users accessed the site in just November 2019.

Also read: Explained: What is the Personal Data Protection Bill and why you should care

The Personal Data Protection Bill, 2019, which was introduced in Lok Sabha in the winter session last year, was referred to a Joint Parliamentary Committee (JPC) of both the Houses.

The government last month decided to seek views and suggestions on the Bill from individuals and associations and bodies concerned and the last date for submitting the comments was on Tuesday.

Prasad, while introducing the Personal Data Protection Bill, 2019, in the Lok Sabha on December 11, announced that the draft Bill empowers the government to ask companies including Facebook, Google and others for anonymised personal data and non-personal data.

There was a buzz when the Bill's latest version was introduced in the Lok Sabha, especially the provision seeking to allow the use of personal and non-personal data of users in some cases, especially when national security is involved.

Several legal experts red-flagged the issue and said the provision will give the government unaccounted access to personal data of users in the country.

In their submission to the JPC, several organisations also flagged that the power to collect non-personal and anonymised data by the government without notice and consent should not form part of the Bill because of issues regarding effective anonymisation and potential abuse.

"Clauses 35 and 36 of the Bill provide unbridled access to personal data to the Central Government by giving it powers to exempt its agencies from the application of the Bill on the basis of various broad worded grounds," SFLC.in, a New Delhi-based not-for-profit legal services organisation, commented.

The Software Alliance, also known as BSA, a trade group which includes tech giants such as Microsoft, IBM and Adobe, among others said that the current version of the privacy bill pose substantial challenges, including the sweeping new powers for the government to acquire non-personal data, restrictions on data transfers, and local storage requirements.

"We urge the Joint Parliamentary Committee, as it considers revisions to the Bill, to eliminate provisions concerning non-personal data from the Personal Data Protection Bill and to remove the data localisation requirements and restrictions on international data flows," said Venkatesh Krishnamoorthy, Country Manager-India, BSA.

The Personal Data Protection (PDP) Bill, 2019 draws its origins from the Justice B.N. Srikrishna Committee on data privacy, which produced a draft of legislation that was made public in 2018 ("the Srikrishna Bill").

The mandatory requirement for storing a mirror copy of all personal data in India as per Section 40 of the Srikrishna Bill has been done away with in the PDP Bill, 2019, meaning that companies like Facebook and Twitter would be able to store data of Indian users abroad if they so wish.

But the bill prohibits processing of sensitive personal data and critical personal data outside India.

What is more, what constitutes critical data has not been clearly defined.

As per the proposals, social media companies will have to modify their application as they are required to have a system in place by which a user can verify themselves.

So legal experts believe that some system to upload identification documents should be there and something like the Twitter blue tick mark should be there to identify verified accounts.

"The 2019 Bill introduces a new category of data fiduciaries called social media intermediaries ('SMIs'). SMIs are a subcategory of significant data fiduciaries ('SDFs') and will be notified by the Central government after due consultation with the DPA, or the Data Protection Authority. Clause 26(4) of the Bill defines SMIs as intermediaries who primarily or solely enable online interaction between two or more users," SFLC.in said.

"On a plain reading of the definition, online platforms like Facebook, Twitter, YouTube, TikTok, ShareChat and WhatsApp are likely to be notified as SMIs under the Bill," it added.

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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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