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
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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News Network
January 27,2020

Jaipur, Jan 27: Senior Congress leader Shashi Tharoor said that if the Citizenship Amendment Act leads to the implementation of the NPR and the NRC, it would be a complete victory for Pakistan's founding father, Muhammad Ali Jinnah.

He said that Jinnah's idea of a country was already winning in India with the contentious Citizenship Amendment Act (CAA) coming into effect, but asserted that there was still a choice available.

"I would not say Jinnah has completely won, but I would say Jinnah is winning. There is still a choice available to the nation between Jinnah's idea of a country and Gandhiji's idea of a country," he said on the sidelines of the Jaipur Literature Festival on Sunday.

The CAA came into force in India in December amid protests across the country and around the world.

The MP from Thiruvananthapuram said that the amended Citizenship Act took Jinnah's logic by declaring that religion shall be the basis of nationhood, reaffirming that Gandhi's idea is that all religions are equal .

"The CAA is, if you are talking Tennis, you would say one set up or big first set lead for Jinnah. But the next step would be if the CAA would lead to the National Population Register (NPR) and the National Register of Citizens (NRC). If that happens, then you would consider that Jinnah's victory is complete," he said.

The CAA seeks to grant citizenship to migrants belonging to Hindu, Sikh, Buddhist, Christian, Jain and Parsi communities who came to India from Pakistan, Bangladesh and Afghanistan on or before December 31, 2014.

On the BJP's defence that the NPR was carried out during the UPA regime, Tharoor said that the Congress government had utilised a decision of the NDA government led by former prime minister Atal Bihari Vajpayee.

"It never asked where were your parents born. It never authorised the enumerators to note on the margin 'dubious citizenship', a term used in the NPR rules crafted by this government. That is purely BJP's invention," he said.

If we go around this country authorising people to interview all the citizens, or identify some who have 'dubious citizenship', you can be pretty sure which Indians are going to be found on the 'dubious citizenship', he said.

"That will principally be one community that is not mentioned in the CAA. And if that happens, then it is indeed Jinnah's victory.

"From wherever he is, he can point to this place and say, 'see I was right in the 1940. We are separate nations and Muslims deserved their own country because Hindus cannot be just'," Tharoor said.

Speaking about the Delhi election, the three-time MP said that the maximum development in the national capital happened under the Congress government.

"What Sheila Dikshit did in her 15 years as Chief Minister of Delhi, no other leader could do it before or after her," he said.

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News Network
February 2,2020

Mount Maunganui, Feb 2: India registered a rare 5-0 whitewash against New Zealand after notching up a seven-run win in the fifth and final T20 International at Bay Oval here on Sunday.

Electing to bat, India posted 163 for three, riding on Rohit Sharma's 60 off 41 balls and a 33-ball 45 from K L Rahul.

The visitors then restricted the hosts to 156 for nine with Jasprit Bumrah claiming three wickets for 12 runs.

Chasing the target, the Black Caps were tottering at 17 for three in 3.2 overs.

Tim Seifert (50) and Ross Taylor (53) then added 99 runs for the fourth wicket as New Zealand recovered to 116.

Seifert clobbered a 30-ball 50 studded with five fours and three sixes, while Ross Taylor hit two sixes and five fours in his 47-ball 53-run innings.

However, once Seifert was dismissed in the 13th over, the hosts suffered a collapse, losing five wickets, including Taylor, for 25 runs to loss the plot in the end.

Brief Score:

India: 163 for 3 in 20 overs (Rohit Sharma 60; S Kuggeleijn 2/25)    

New Zealand: 156 for 9 in 20 overs (Ross Taylor 53, Tim Seifert 50; Jasprit Bumrah 3/12).

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