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
April 26,2024

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The US military has started the construction of a controversial maritime pier off the coast of Gaza, claiming that it seeks to bring aid into the besieged strip.

"I can confirm that US military vessels, to include the USNS Benavidez, have begun to construct the initial stages of the temporary pier and causeway at sea," Pentagon spokesperson Major General Patrick Ryder told reporters on Thursday.

US President Joe Biden ordered the construction of the pier in March. Shortly afterwards, the US deployed naval ships to the Eastern Mediterranean to construct the "floating pier" that will reportedly receive aid from Cyprus, and send it onward to Gaza.

The US announcement came amid mounting pressure on Israel to allow aid into Gaza as the UN and other aid agencies have warned of imminent famine due to Israel's prevention of the land-based delivery of life-saving aid to Gaza.

The deputy UN food chief said on Thursday the northern Gaza Strip is still heading toward a famine.

World Food Program (WFP) Deputy Executive Director Carl Skau called for a greater volume of aid to be allowed into Gaza and appealed for Israel to allow direct access from the southern Ashdod port to the Erez crossing.

The pier is scheduled to become operational in May.

Reuters quoted a senior Biden administration official, who asked not to be named, as saying that aid coming off the corridor will still need to pass through Israeli checkpoints on land, raising questions about possible delays even after aid reaches shore.

That is despite the aid having already been inspected by Israel in Cyprus prior to being shipped to the besieged strip.

According to the official, nearly 1,000 US troops would support the military effort, including in coordination cells in Cyprus and Israel.

The Israeli military said its troops would protect the US troops who are setting up the pier and provide logistics support for it.

Last month, experts said Israel backed the US plan to construct the pier in order to retain control over the aid deliveries and as a way to displace Palestinians from the besieged strip via the Mediterranean Sea, ahead of an expected invasion of the southern town of Rafah, where nearly more than half of Gaza's population of 2.4 have sought shelter from Israeli strikes elsewhere in Gaza.

Israel launched the war on Gaza on October 7 after the Palestinian resistance movement Hamas waged the surprise Operation Al-Aqsa Storm against the occupying entity in response to the Israeli regime's decades-long campaign of bloodletting and devastation against Palestinians.

Tel Aviv has also blocked water, food, and electricity to Gaza, plunging the coastal strip into a humanitarian crisis.

Since the start of the offensive, the Tel Aviv regime has killed at least 34,305 Palestinians and injured 77,293 others.

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News Network
May 3,2024

Mangaluru, May 3: The Mangaluru City Corporation will resort to water rationing from May 5 as the Thumbe vented dam, which supplies drinking water to the city, is facing a shortage in water storage.

Instead of daily supply, water will be supplied on alternate days, the Executive Engineer (Water Supply) at the corporation said in a release.

The release said that water will be supplied to Mangaluru City North on May 5. There will be no water supply to Mangaluru City North on May 6. Instead water will be supplied to Mangaluru City South on May 6. Likewise the supply on alternate days will continue.

The inflow in the Netravathi has stopped, the release said, requesting people to cooperate with the corporation and not waste water for washing vehicles and other purposes.

An engineer at the corporation said that water level at the dam stood at 4.27 m on Wednesday against the full storage level of 6 m. If water is supplied daily to the entire city (Mangaluru City North and Mangaluru City South) the existing storage will last only for 16 days, the engineer said. Hence the decision to supply water on alternate days has been taken to supply water till May-end.

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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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