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
February 5,2020

New Delhi, Feb 5: Days after a gunman opened fire in Delhi's Shaheen Bagh, the epicentre of anti-CAA movement, YouTuber Gunja Kapoor was detained at the protest site on Wednesday after she was caught covertly filming the protests in a burqa.

Kapoor runs the channel ‘Right Narrative’ on YouTube and her pinned tweet on Twitter says she is followed on the microblogging site by PM Narendra Modi.

According to police, the protesters turned suspicious after Kapoor asked them "too many questions". She was caught by some of the women protesters after they identified her as the popular YouTuber. The incident led to a commotion at Shaheen Bagh, the epicentre of protests against the Citizenship Amendment Act (CAA), a senior police official said.

She was taken to Sarita Vihar police station where her identity was ascertained, police said.

The incident sparked outrage on social media. Many took to Twitter to question why Kapoor was at the protest in disguise. Others expressed concern about her motives at secretly filming the protests.

Meanwhile, praises flew in for the women of Shaheen Bagh who can be seen defending Kapoor from angry protesters after she was caught.

This is not the first time that a right wing social media activist has landed in trouble in Shaheen Bagh where residents and other women and children have been sitting in protest for nearly two months since the passing of the contentious Citizenship Amendment Act 2019 in December last year.

In January, Deepa Sharma had posted videos online about the "traumatic" experience she had when she was allegedly heckled and harassed by Shaheen Bagh protesters. While the woman's claim could never be verified, other pieces of rampant fake news aimed at delegitimising and villainising protesters has taken social media by storm.

From doctored videos of women protesters allegedly accepting they were paid Rs 500 to attend protests to alleged fights over biriyani and anti-India sloganeering, trolls on social media seem to be working overtime to taint the ongoing protests.

The latter, however, show no signs of giving up. In fact, as Delhi nears elections on February 8, protesters have arranged for music performances by eminent artists, including pop celebrity Prateek Kuhad, till February 7.

Sit in protests take place 24x7 with women showing up in thousands to spend the night and sing songs of protest. And with polls around the corner, the protests have become an active part of political discourse with Aam Aadmi Party's Manish Sisodia expressing his support for the protesters at a recent press conference.

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News Network
June 9,2020

Washington, Jun 9: The defacement of Mahatma Gandhi's statue by unknown miscreants was a "disgrace", US President Donald Trump has said, days after it was vandalised with graffiti and spray painting during the nationwide protests against the custodial killing of African-American George Floyd.

The statue, which is across the road from the Indian Embassy, was vandalised on the intervening night of June 2 and 3, prompting the Indian embassy to register a complaint with the local law enforcement agencies.

The incident happened during the week of nationwide protests against the custodial killing of Floyd in Minneapolis on May 25.

"It was a disgrace," Trump made the brief comment at the White House on Monday when asked about the incident.

The Indian Embassy here has taken up the matter with the US Department of State for early investigation into the matter, as also with the Metropolitan Police and National Park Service.

It is working with the US Department of State, Metropolitan Police and National Park Service for expeditious restoration of the statue at the park.

The US president and First Lady Melania Trump, during their visit to India in February, had spent considerable time at the Gandhi Ashram in Ahmedabad. Prime Minister Narendra Modi had personally given them a tour of the historic place.

"The First Lady and I have just had a pleasure of visiting Mahatma Gandhi's Ashram, a few miles from here, where he launched the famous Salt March," Trump had said during his address at the Namaste Trump rally at the Motera Stadium in Ahmedabad on February 24. A day later, Trump and the first lady also laid a wreath at Raj Ghat in New Delhi.

Pictures of Trump and the first lady with Gandhi's spinning wheel during their visit to the Sabarmati Ashram in Ahmedabad are seen hanging on the walls of the White House.

Last week, top US lawmakers and the Trump Campaign condemned the vandalisation of the statue.

"Very disappointing," tweeted Kimberly Guilfoyle, advisor to Donald J Trump for President Inc. and National Chair of the Trump Victory Finance Committees.

North Carolina Senator Tom Tillis said, "It's disgraceful to see the defacing of the Gandhi statue" in Washington DC.

"Gandhi was a pioneer of peaceful protesting, demonstrating the great change it can bring. Rioting, looting and vandalising do not bring us together, he said.

Senator Marco Rubio said, "more evidence that violent radicals and run of the mill crazies have hijacked legitimate protests to create anarchy or for their own purposes."

Protests against the custodial killing of Floyd turned violent in the US and prestigious monuments were damaged. In Washington DC, protestors burnt a historic church and damaged monuments like the Lincoln Memorial.

US Ambassador to India Ken Juster apologised for the incident.

"So sorry to see the desecration of the Gandhi statue in Wash, DC. Please accept our sincere apologies," he said.

"Appalled as well by the horrific death of George Floyd and the awful violence and vandalism. We stand against prejudice & discrimination of any type. We will recover and be better," he said in a tweet last week.

One of the few statues of a foreign leader on a federal land in Washington DC, the statue of Gandhi was dedicated by former prime minister Atal Bihari Vajpayee in the presence of the then US president Bill Clinton on September 16, 2000, during his state visit to the US.

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News Network
January 27,2020

Jehanabad, Jan 27: The police here carried out a raid at the ancestral house of anti-CAA activist Sharjeel Imam, who has been slapped with a sedition case in the national capital for alleged inflammatory speeches he gave at Shaheen Bagh and the Jamia Milia Islamia, a senior official said on Monday.

According to Superintendent of Police, Jehanabad, Manish Kumar, Imams house in Kako police station area was raided late on Sunday night following "help sought by central agencies" which are investigating the cases lodged against the JNU research scholar.

Imam was not found at his house but two of his relatives and their driver were detained for interrogation and let off thereafter, the SP said.

A graduate in computer science from IIT-Mumbai, Sharjeel Imam had shifted to Delhi for pursuing research at the Centre for Historical Studies, JNU.

He was slapped with a sedition case after his alleged speeches went viral on the social media wherein he was heard speaking about Assam's possible secession from the country in the wake of the Citienship (Amendment) Act (CAA).

Earlier, he had been booked on similar charges at a police station in Aligarh for a speech he delivered on the AMU campus.

Besides, a case under the stringent anti-terror law UAPA has been registered against him at Assam.

Imams late father Akbar Imam was a local JD(U) leader who had unsuccessfully contested an assembly election in his lifetime.

Reacting to the developments, his distraught mother Afshan Rahim told the media, "My son is innocent. He is a bright young man and not a thief or a pickpocket. I swear in the name of God that I do not know about his whereabouts. But I can guarantee that upon learning about the cases, he will appear before the investigating agencies and fully cooperate in the probe."

She said that it has been a long time since she met her son though she had a telephonic conversation with him a few weeks ago.

"He was obviously disturbed by the CAA and fears of the National Register of Citiznes (NRC) about being implemented across the country which, he said, would affect not just Muslims but all poor people," she said.

In fact, after 15 days of Shaheen Bagh protest, he had asked the agitators there to withdraw and watch the situation for a month, and then decide on the further course of action, she said. "But they refused to relent. He was calling for a 'chakkajam' (road blockade). He is just a kid and not capable of instigating people for secession," she added.

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