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
May 20,2020

United Nations, May 20: Highlighting India's long-standing history of promoting inclusive and peaceful societies, a top UN official on Tuesday voiced concern over incidents of "increased hate speech and discrimination" against minority communities in the country following the adoption of the Citizenship Amendment Act.

Under-Secretary-General and UN Special Adviser on the Prevention of Genocide Adama Dieng, however, welcomed Prime Minister Narendra Modi’s call for unity and brotherhood in the wake of the COVID19 pandemic.

Dieng said in a note to the media on Tuesday that he is "concerned over reports of increased hate speech and discrimination against minority communities in India" since the adoption of the Citizenship Amendment Act (CAA) in December 2019.

The Indian government has maintained that the CAA is an internal matter of the country and stressed that the goal is to protect the oppressed minorities of neighbouring countries.

The CAA, which was notified on January 10, grants Indian citizenship to non-Muslim minorities migrated to India from Afghanistan, Pakistan and Bangladesh till December 31, 2014, following persecution over their faith.

"While the objective of the act, to provide protection to minority communities is commendable, it is concerning that this protection is not extended to all groups, including Muslims. This is contrary to India’s obligations under international human rights law, in particular on non-discrimination,” Dieng said.

The Special Adviser recognised "India’s long standing and well recognised history of promoting inclusive and peaceful societies, with respect for equality and principles of non-discrimination.”

He also welcomed recent statements by Prime Minister Modi that the COVID-19 pandemic “does not see race, religion, colour, caste, creed, language or border before striking and that our response and conduct...should attach primacy to unity and brotherhood.”

Dieng encouraged the Government of India to "continue to abide by this guidance by ensuring that national laws and policies follow international standards related to non-discrimination and to address and counter the rise of hate speech through messages of inclusion, respect for diversity and unity.”

He further reiterated that he would continue to follow developments and expressed his readiness to support initiatives to counter and address hate speech.

The hate speech and the dehumanisation of others goes against international human rights norms and values, he added.

“In these extraordinary times brought about by the COVID-19 crisis it is more important than ever that we stand united as one humanity, demonstrating unity and solidarity rather than division and hate,” he said.

Dieng also expressed concern over reports of violence during demonstrations against CAA in some regions of India.

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News Network
January 17,2020

Mumbai, Jan 17: A 68-year-old convict of the 1993 Mumbai serial blasts case, Jalees Ansari, went missing on Thursday morning while being on parole, officials said.

Ansari, a resident of Mominpura in Agripada here who is serving a life term, is suspected to be involved in many bomb blast cases across the country, an official said.

He was on parole for 21 days from the Ajmer Central Prison, Rajasthan, and was expected to surrender before prison authorities on Friday, he said.

During the parole period, he was ordered to visit the Agripada Police Station everyday between 10.30 am and 12 pm to mark his attendance, he said.

However, Ansari did not visit the police station on Thursday during the designated time, the official said.

In the afternoon, his 35-year-old son Jaid Ansari approached the police station with a complaint about his “missing” father, he said.

According to the complaint, Jalees Ansari woke up in the early hoursand told family members he is going to offer namaz, but did not return home.

On his complaint, the Agripada Police registered a missing case, he said.

The Crime Branch of the Mumbai Police and the Maharashtra ATS have launched a massive manhunt to trace him, he said.

Jalees, who is known as Doctor Bomb, was allegedly connected with terror outfits like SIMI and Indian Mujahidin and taught terror groups how to make bombs, he said.

He was also questioned by the NIA in 2011 in connection with the 2008 bomb blast in Mumbai, he said.

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News Network
January 6,2020

Dubai/Washington, Jan 6: Tens of thousands of Iranians thronged the streets of Tehran on Monday for the funeral of Quds Force commander Qassim Suleimani who was killed in a US air strike last week and his daughter said his death would bring a "dark day" for the United States.

"Crazy Trump, don't think that everything is over with my father's martyrdom," Zeinab Suleimani said in her address broadcast on state television after US President Donald Trump ordered Friday's strike that killed the top Iranian general.

Iran has promised to avenge the killing of Qassim Suleimani, the architect of Iran's drive to extend its influence across the region and a national hero among many Iranians, even many of those who did not consider themselves devoted supporters of the Islamic Republic's clerical rulers.

The scale of the crowds in Tehran shown on television mirrored the masses that gathered in 1989 for the funeral of the founder of the Islamic Republic, Ayatollah Ruhollah Khomeini.

In response to Iran's warnings, Trump has threatened to hit 52 Iranian sites, including cultural targets, if Tehran attacks Americans or US assets, deepening a crisis that has heightened fears of a major Middle East conflagration.

The coffins of the Iranian general and Iraqi militia leader Abu Mahdi al-Muhandis, who was also killed in Friday's attack on Baghdad airport, were passed across the heads of mourners massed in central Tehran, many of them chanting "Death to America".

One of the Islamic Republic's major regional goals, namely to drive US forces out of neighbouring Iraq, came a step closer on Sunday when the Iraqi parliament backed a recommendation by the prime minister for all foreign troops to be ordered out.

"Despite the internal and external difficulties that we might face, it remains best for Iraq on principle and practically," said Iraqi caretaker Prime Minister Adel Abdul Mahdi, who resigned in November amid anti-government protests.

Iraq's rival Shi'ite leaders, including ones opposed to Iranian influence, have united since Friday's attack in calling for the expulsion of US troops.

Esmail Qaani, the new head of the Quds Force, the Revolutionary Guards' unit in charge of activities abroad, said Iran would continue Suleimani's path and said "the only compensation for us would be to remove America from the region."

ALLIES AT FUNERAL

Prayers at Suleimani's funeral in Tehran, which will later move to his southern home city of Kerman, were led by Iran's Supreme Leader Ayatollah Ali Khamenei. Suleimani was widely seen as the second most powerful figure in Iran behind Khamenei.

The funeral was attended by some of Iran's allies in the region, including Ismail Haniyeh, the leader of Palestinian group Hamas who said: "I declare that the martyred commander Suleimani is a martyr of Jerusalem."

Adding to tensions, Iran said it was taking another step back from commitments under a 2015 nuclear deal with six major powers, a pact from which the United States withdrew in 2018.

Washington has since imposed tough sanctions on Iran, describing its policy as "maximum pressure" and saying it wanted to drive down Iranian oil exports - the main source of government revenues - to zero.

Talking to reporters aboard Air Force One on the way to Washington from Florida on Sunday, Trump stood by his remarks to include cultural sites on his list of potential targets, despite drawing criticism from US politicians.

"They're allowed to kill our people. They're allowed to torture and maim our people. They're allowed to use roadside bombs and blow up our people. And we're not allowed to touch their cultural sites? It doesn't work that way," Trump said.

Democratic critics of the Republican president have said Trump was reckless in authorizing the strike, and some said his comments about targeting cultural sites amounted to threats to commit war crimes. Many asked why Soleimani, long seen as a threat by US authorities, had to be killed now.

Republicans in the US Congress have generally backed Trump's move.

Trump also threatened sanctions against Iraq and said that if US troops were required to leave the country, Iraq's government would have to pay Washington for the cost of a "very extraordinarily expensive" air base there.

He said if Iraq asked US forces to leave on an unfriendly basis, "we will charge them sanctions like they've never seen before ever. It'll make Iranian sanctions look somewhat tame."

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