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 5,2024

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Maharashtra Leader of Opposition Vijay Namdevrao Wadettiwar waded into controversy after he alleged that an RSS-affiliated cop, and not terrorist Ajmal Kasab, killed former state anti-terrorism squad (ATS) chief Hemant Karkare during the 26/11 Mumbai terror attack.

In a video statement released on Saturday, the Congress leader alleged that the bullet that killed IPS officer Hemant Karkare did not come from the gun of Ajmal Kasab or any of the other nine Pakistani terrorists involved in the attacks.

Instead, he claimed it came from the weapon of a police officer allegedly "dedicated to" the Rashtriya Swayamsevak Sangh (RSS).

Wadettiwar also accused Ujjwal Nikam, the special public prosecutor in the case and a BJP Lok Sabha candidate from Mumbai North Central, of suppressing this information, labeling him a "traitor."

He questioned the BJP's decision to nominate Nikam for the Lok Sabha polls, accusing the party of protecting traitors.

“During the probe, key information was out. However, it was suppressed by Ujjwal Nikam, who is a traitor. My question is, why is BJP protecting a traitor and nominating such a person for Lok Sabha polls? By doing this, BJP is protecting traitors," Wadettiwar alleged, Times of India reported.

These allegations drew strong responses from Nikam and Deputy Chief Minister Devendra Fadnavis.

Nikam condemned Wadettiwar's statement as "baseless and irresponsible," expressing pain at the doubts raised over his integrity.

He emphasized the legal steps taken to convict Kasab, calling Wadettiwar's remarks an insult to the victims of the 26/11 attacks.

“What a reckless statement is being made. I am pained by such baseless allegations, raising doubts over my integrity. It clearly reflects the level of electoral politics. I never thought politicians will stoop to such low levels. For political gain? He (Wadettiwar) is insulting not me, but the 166 departed souls and all persons injured in the 26/11 attacks," Nikam said.

He added, “They (Congress) hold Kasab as innocent. Even Pakistan had accepted that Kasab was involved in the conspiracy and in the terror attack on India and was guilty".

He said Indians very well know the legal steps he had taken to ensure Kasab’s conviction.

Nikam said citizens of the nation would on 4 June, the day of results for Lok Sabha polls, give their reply to such allegations, adding he wished not to dignify the “desperate disinformation” with a further response.

Meanwhile, BJP leader and Deputy CM Fadnavis said, “Our alliance is with Nikam, while Congress has joined hands with Kasab".

Shiv Sena spokesperson Kiran Pawaskar said NIA should arrest Wadettiwar and ask him why he was defending Kasab.

Pawaskar criticized the Congress for allegedly supporting terrorists and expressed surprise at the silence of Shiv Sena chief Uddhav Thackeray on the matter.

“From Wadettiwar’s statement, it appears Congress is supporting terrorists who attacked Mumbai. More shocking is the fact that Sena (UBT) chief Uddhav Thackeray has maintained silence over the episode,” he said.

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News Network
May 5,2024

Karwar, May 5: What commenced as a mere exchange of words between spouses swiftly transmuted into a calamitous ordeal, resulting in the heartbreaking loss of their innocent offspring. The heart-wrenching incident unfolded in the serene confines of Halamaddy village in the picturesque expanse of Dandeli, nestled within the idyllic expanse of Uttara Kannada district.

In the throes of a fervent dispute with her spouse, the aggrieved wife, succumbing to an overwhelming surge of emotions, callously propelled their tender six-year-old progeny into the somber depths of a nearby canal, thereafter alerting the local populace to her grievous act.

Promptly apprised of the distressing occurrence by concerned bystanders, the authorities were swiftly summoned to the scene to confront the harrowing aftermath.

Responding to the distress call, the diligent officers of Dandeli rural police swiftly converged upon the site where the innocent child had been cast into the unforgiving waters of the canal, subsequently effecting the retrieval of the child's lifeless form. 

Regrettably, it was discerned that a portion of the child's remains had been tragically claimed by the lurking jaws of a predatory crocodile.

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News Network
May 19,2024

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A senior UN official says around 800,000 people have been "forced to flee" Rafah in the southern Gaza Strip since the Israeli regime began carrying out ground incursions into the refugee-packed city from various axes.

Philippe Lazzarini, the head of UNRWA, the UN agency for Palestinian refugees, made the remarks in a post on X, former Twitter, on Saturday.

"Nearly half of the population of Rafah or 800,000 people are on the road having been forced to flee since the Israeli forces started the military operation in the area on May 6," he said.

The invasion of the city came amid a genocidal war against Gaza by the regime that has so far claimed the lives of more than 35,300 Palestinians.

Around 1.5 million Palestinians had taken refuge in Rafah prior to the incursions, having fled there from the ravages of the war that began following a retaliatory operation against the occupied territories by Gaza’s resistance groups.

The Gazans, who have now left the city, have fled to "the middle areas and [the southern Gaza city of] Khan Younis, including to destroyed buildings," Lazzarini said.

Al-Mawasi, a 14-square-kilometer town on the coast, as well as the central city of Deir el-Balah, were "crammed" with recently displaced people, he added.

"Every time, they are forced to leave behind the few belongings they have ....Every time, they have to start from scratch, all over again."

The Israeli military has, meanwhile, seized the Rafah crossing in southern Gaza, which borders Egypt and serves as the main point of entry for aid supplies, including fuel, into Palestinian territory.

The move came as part of an all-out siege that the regime has been enforcing against the entire Gaza simultaneously with the war.

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