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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February 28,2020

Patna, Feb 28: Social and cultural activists from far and wide converged here on Thursday to lend their support to a massive rally that marked the conclusion of Kanhaiya Kumar's 'Jan Gan Man Yatra' across Bihar to galvanise public opinion against CAA-NPR-NRC.

Medha Patkar of the Narmada Bachao Andolan fame, Mahatma Gandhi's grandson Tushar Gandhi and former IAS officer Kannan Gopinathan, who gave up his career at a young age in protest against abrogation of Article 370, shared the stage with the former JNU students' leader.

Shabnam Hashmi -- founder of socio-cultural organisation ANHAD and sister of slain Marxist playwright and director Safdar Hashmi -- also joined them.

Congress MLA Shakil Ahmed Khan, a former president of JNU students' union himself who accompanied Kanhaiya during his tour that commenced at Champaran on January 30, Mahatma Gandhi's death anniversary, and leaders of state units of CPI and CPI(M) also addressed the rally held at Gandhi Maidan.

Kanhaiya began his speech with a one-minute silence held in the memory of those who lost their lives in Delhi violence.

Defending his frequent use of the term "azadi" (freedom) which supporters of the Sangh Parivar hold to be tantamount to supporting secession, Kanhaiya said, "We must talk about the virtues of azadi here since today happens to be the day when legendary revolutionary Chandrashekhar Azad had given up his life fighting the British."

Charging the ruling BJP with pitting Hindus against Muslims, he said, "Let us resolve to defeat their agenda by emulating the fabled friendship of Ram Prasad Bismil and Ashfaqullah Khan."

The young CPI leader, who made an unsuccessful debut from his native Begusarai Lok Sabha constituency last year, seemed unimpressed with the resolution passed by the Bihar Assembly earlier this week against NRC and inclusion of contentious clauses in NPR forms.

"Both the government and the opposition are busy congratulating themselves. I extend my congratulations as well. But to all those who are present here, I would say it is a half-victory. We must not allow our movement to fizzle out and draw inspiration from Gandhi's model of civil disobedience when the NPR exercise gets underway," he said.

"Villagers should ask their respective panchayat heads to ensure that no NPR official is allowed to come knocking in their areas of jurisdiction when NPR is scheduled to be undertaken in May," the CPI leader said.

"We have to brace for a long and tough fight. We are living under a regime which sends conscientious professionals like Dr Kafeel Ahmed behind the bars and declares anybody questioning its actions as an anti-national," said Kanhaiya, who has himself been slapped with a sedition case.

Earlier, in his address, Tushar Gandhi likened CAA, NPR and NRC to the "three bullets that killed the Mahatma" and asserted that these measures would "harm the poor, belonging to all religious communities and not just the Muslims".

"If the government does not care about the poor, we must tell those in power -- 'chale jaao' (go away) just as we had done to the British colonisers... it is going to be a long fight. Independence was achieved five years after the call for Quit India Movement," he said.

"We need to keep repeating the importance of non-violence over and over again while those with other value systems simply have to utter inciting statements," he said, in an oblique reference to the controversial poll campaign of Union minister and BJP leader Anurag Thakur during the recently-held Delhi Assembly elections, which the party lost.

Kannan Gopinathan said, "The claim that CAA is all about granting citizenship and not taking it away is bunkum. Any law which seeks to favour one section of the society on the basis of religion can be tweaked to harm another social segment... people say this government is Fascist. I am not sure of that but it is certainly stupid."

"This government brought in demonetisation and wrecked the economy but failed to achieve its promise of eradicating black money. It abrogated Article 370 and now it is clueless as to what to do with the situation in Kashmir," he said.

"Union minister Amit Shah had declared in Parliament that NRC will be implemented. Faced with public resistance, Prime Minister Narendra Modi had to say he does not know what NRC is. Keep up the stir for a little longer, he will start saying he does not know Amit Shah," said Kannan, evoking peals of laughter.

In the course of his speech, Kanhaiya also made the crowds sing after him the National Anthem but skipped a few words towards the end. Participants at the rally were viciously trolled on social media for the slip-up.

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News Network
January 21,2020

Amaravati, Jan 21: Telugu Desam Party president N Chandrababu Naidu and at least 17 MLAs of his party were taken in police custody late on Monday as they tried to conduct a foot march from the state assembly to nearby Mandadam village in violation of prohibitory orders.

TDP leaders started off on the march after staging a sit-in near the assembly main entrance following the suspension of 17 MLAs from the House for the day.

They were protesting the AP Decentralisation and Inclusive Development of All Regions Bill, 2020, that was passed by the assembly, enabling the establishment of three capitals for the state.

The TDP leaders were taken to the Mangalagiri police station.

Meanwhile, tensions prevailed at the Jana Sena Party headquarters at Mangalagiri as police prevented its president Pawan Kalyan from proceeding to the Amaravati region to speak to protesters fighting for the retention of only one capital for the state.

DIG Kanti Rana Tata and other senior police officials reached the Sena office and blocked the exit of Kalyan and political affairs committee chairman Nadendla Manohar, resulting in an argument.

Kalyan asked how could police impose restrictions within his own office.

Scores of Sena workers gathered outside the office even as a large posse of police was posted to thwart Kalyan and other leaders' plans.

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News Network
January 6,2020

Jammu, Jan 6: Union Minister Jitendra Singh on Sunday said India is the only shelter for religiously persecuted Hindus, Sikhs and other minorities who come from Pakistan, Bangladesh or Afghanistan, for the safety of their life and honour.

"India owes responsibility towards the minorities living in these countries which proclaim Islam as their state religion," Singh said here while launching the BJP's countrywide 10-day mass contact drive to spread awareness about the Citizenship Amendment Act (CAA).

Accompanied by senior party colleagues, including former deputy chief minister Kavinder Gupta and former minister Sat Sharma, he began by visiting the house of veteran columnist, writer and Padmashri awardee K L Pandita, where he spent time with them discussing the Act.

Later, he visited prominent social activist Amjad Mirza, eminent Sikh religious leader Baba Swaranjit Singh, retired High Court judge Justice G D Sharma, veteran journalist and former bureau head of Hind Samachar group Gopal Sachar, retired principal of Jammu government medical college Subhash Gupta, social activist and president of Peoples' Forum Ramesh Sabharwal, among others.

During his interaction with them, the Minister of State in the Prime Minister's Office claimed that Congress leaders and their allies protesting against the Act are doing so without "conviction".

He opined that if a "survey" was conducted among the family members of these Congress leaders, then, even they would not support their "anti-CAA stand".

"The tragedy of Congress party and contemporary leaders of Congress is that either they do not read their own history or are blissfully ignorant of the statements made by their own party patriarchs and former prime ministers," he said.

The minister recalled that the Nehru-Liaquat Pact of 1950 was inspired by the realisation on the part of the then Congress government headed by prime minister Jawaharlal Nehru that minorities, particularly Hindus, were not getting a fair deal in Pakistan.

"In 1949, Nehru had written a letter expressing concern about people coming in from then East Pakistan, which is now Bangladesh, and while doing so, he had referred to Hindus coming from there as 'refugees' and Muslims arriving here as 'immigrants'," Singh said.

Further, Nehru had stated that India owed a "responsibility" to these refugees, the minister said.

Referring to the opposition of senior Congress leaders Rahul Gandhi and Priyanka Gandhi to the amended legislation, the minister said someone should show them records of proceedings of the winter session of Parliament in 1950 when their great-grandfather (Nehru) had himself said that they deserved to be given citizenship and if the law was inadequate for it, then, the law should be changed.

"PM Modi should actually be given credit for showing courage and conviction to carry forward the task, which the Congress government lacked, to accomplish this," the minister opined.

Singh reiterated that a false fear psychosis against Muslims is being sought to be manufactured when there is no place as safe and comfortable to live for the community as India.

Turning the tables on the opposition to the National Population Register(NPR) and proposed National Register of Citizens (NRC), Singh pointed out that PM Modi and Union Home Minister Amit Shah have been stating that the exercise on NRC is yet to begin.

He also said that it was then Union home minister P Chidambaram, who had stated in Parliament in 2010 that NPR could be a basis for NRC.

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