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.

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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
March 4,2020

New Delhi, Mar 4: The Supreme Court on Wednesday revoked the ban of cryptocurrency imposed by the Reserve Bank of India (RBI) in 2018.

Pronouncing the verdict, the three-judge bench of the apex court said the ban was 'disproportionate'.

The bench included Justice Rohinton Fali Nariman, Justice S Ravindra Bhat and Justice V Ramasubramanian.

The Internet and Mobile Association of India (IAMAI), whose members include cryptocurrency exchanges, and others had approached the top court objecting to a 2018 RBI circular directing regulated entities to not deal with cryptocurrencies.

Advocate Ashim Sood, appearing for IAMI, submitted that Reserve Bank of India lacked jurisdiction to forbid dealings in cryptocurrencies. The blanket ban was based on an erroneous understanding that it was impossible to regulate cryptocurrencies, Sood submitted.

The petitioners had argued that the RBI's circular taking cryptocurrencies out of the banking channels would deplete the ability of law enforcement agencies to regulate illegal activities in the industry.

IAMAI had claimed the move of RBI had effectively banned legitimate business activity via the virtual currencies (VCs).

The RBI on April 6, 2018, had issued the circular that barred RBI-regulated entities from "providing any service in relation to virtual currencies, including those of transfer or receipt of money in accounts relating to the purchase or sale of virtual currencies".

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Agencies
January 24,2020

New Delhi, Jan 24: The Election Commission of India on Friday told the Supreme Court that its 2018 direction asking poll candidates to declare their criminal antecedents in electronic and print media has not helped curb criminalisation of politics. The poll panel suggested that instead of asking candidates to declare criminal antecedents in the media, political parties should be asked not to give tickets to candidates with criminal background.

A bench of Justices R F Nariman and S Ravindra Bhat asked the ECI to come up with a framework within one week which can help curb criminalisation of politics in nation's interest.

The top court asked the petitioner BJP leader and advocate Ashiwini Upadhyay and the poll panel to sit together and come up with suggestions which would help him in curbing criminalisation of politics.

In September 2018, a five-judge Constitution bench had unanimously held that all candidates will have to declare their criminal antecedents to the Election Commission before contesting polls and had called for a wider publicity, through print and electronic media about antecedents of candidates.

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Satya Vishwasi
 - 
Saturday, 25 Jan 2020

What about those criminals who were already in parliament and vidahan sabhas? shall the ECI cancel their positions?

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News Network
January 2,2020

Kolkata, Jan 2: In what could spark fresh tensions between West Bengal Chief Minister Mamata Banerjee and the BJP-led centre, the Union Ministry of Defence on Wednesday rejected her state's tableau proposal for the Republic Day parade on January 26.

"The tableau proposal of West Bengal government was examined by the expert committee in two rounds of meetings. The tableau proposal of the West Bengal government was not taken forward for further consideration by the committee after deliberations in the second meeting," the ministry said in its statement.

Twenty two proposals comprising 16 states and union territories and six ministries and departments have been shortlisted for the parade. The shortlist was compiled from as many as 56 tableau proposals - 32 from states and union territories and 24 from various ministries and departments - received by the central government.

"The expert committee examines the proposals on the basis of theme, concept, design and visual impact before making its recommendations. Due to time constraints arising out of the overall duration of the parade, only a limited number of tableaux can be shortlisted for participation in the parade," the statement read, adding that West Bengal was shortlisted for the 2019 Republic Day parade through a similar process.

"The rejection of the West Bengal tableau for the Republic Day parade is discriminatory. It has been done because West Bengal has been opposing the centre's CAA (Citizenship Amendment Act) and the NRC (National Register of Citizens) plans," Trinamool Congress MP Saugata Roy told news agency.

"West Bengal is known to be living state as far as culture, including arts, music and other things are concerned. So obviously, this is a discriminatory step taken by the central government against West Bengal," Mr Roy added.

The Trinamool Congress-led Bengal government is at loggerheads with the central government over several issues, and the expanding presence of the BJP in the eastern state ahead of the 2021 assembly elections has further intensified their rivalry.

Mamata Banerjee has repeatedly said that she will not allow Bengal to be a part of the proposed nationwide National Register of Citizens, an assertion that the BJP claims is proof of her minority appeasement strategy. Last month, a four-member delegation of Trinamool Congress politicians that visited BJP-ruled Uttar Pradesh to meet families of those killed in violent protests against the Citizenship Amendment Act were stopped by police personnel at the Lucknow airport.

The BJP leadership has now decided to launch a campaign blitzkrieg in West Bengal to counter what it claims is the Trinamool's "misinformation programmes" against the amended citizenship law and reach out to refugees. Protests across the country have currently put the party on the backfoot.

The Citizenship Amendment Act, for the first time, makes religion the test of citizenship in India. The government says it will help minorities from three Muslim-dominated countries get citizenship if they fled to India because of religious persecution before 2015. Critics say it is designed to discriminate against Muslims and violates the secular principals of the Constitution.

Brazilian President Jair Bolsonaro will be the chief guest at the Republic Day celebrations.

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