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 24,2024

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Bengaluru: Former Prime Minister H D Deve Gowda on Wednesday slammed Rahul Gandhi’s "wealth redistribution promise", stating that only someone with no practical knowledge can speak like that.

 “He is dreaming of a revolution. By talking about wealth redistribution, Rahul Gandhi has insulted and humiliated two Congress Prime Ministers who brought market reforms and increased the wealth of the nation,” he added, recalling the contribution of P V Narasimha Rao and Manmohan Singh in economic liberalisation.

Accusing Gandhi of indirectly trying to say that what the two Congress Prime Ministers did was wrong, Gowda said, "He (Rahul Gandhi) has torn up their economic reforms like he had torn up an ordinance (which sought to overturn the rule that disqualifies convicted MPs and MLAs) issued by (the then) Manmohan Singh (government)."

The 90-year-old JD(S) supremo ridiculed the Congress manifesto claiming that only a party that is sure of never coming to power can make as many promises.

“The Congress has promised so many things in its manifesto. The only party that is very sure of never coming to power will promise so much,” Gowda said at a press conference here.

He said the Congress wants to turn this country 'upside down' and the promises made by it indicated that it wants to come to power 'at any cost'.

“Rahul Gandhi wants to do a wealth survey and distribute the wealth. Does he think he is a mass leader,” Deve Gowda said.

Picking up points from the Congress manifesto ‘Nyay Patra’, Gowda said Rahul Gandhi wants to 'give 30 lakh new central government jobs and run this country'.

“There are only 40 lakh sanctioned jobs. How can he create 30 lakh more jobs overnight? How much will he pay these people? Where will he employ them,” he asked.

“Only someone with no practical knowledge can speak like this. (P) Chidambaram was the manifesto committee chairman. Does he agree with Rahul Gandhi’s immature economic ideas,” Gowda said.

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News Network
April 20,2024

Union Finance Minister Nirmala Sitharaman, on Friday, said that the Bharatiya Janata Party (BJP) plans to reintroduce electoral bonds in some capacity following extensive consultations with all stakeholders, should it come back to power in the 2024 general elections, according to a report in the Hindustan Times (HT).

HT cited Nirmala Sitharam as saying, “We still have to do a lot of consultation with stakeholders and see what is it that we have to do to make or bring in a framework which will be acceptable to all, primarily retain the level of transparency and completely remove the possibility of black money entering into this.”

However, the Centre has not yet decided whether to seek a review of the ruling made by the Supreme Court (SC), she said.

She further added, “What the scheme, which has been just thrown out by the Supreme Court, brought in was transparency. What prevailed earlier was just free-for-all.”

Launched in 2018, electoral bonds were accessible for acquisition at any State Bank of India (SBI) branch. Contributions made through this programme by corporations and even foreign entities via Indian subsidiaries received full tax exemption, while the identities of the donors remained confidential, safeguarded by both the bank and the recipient political parties.

On February 15, a five-judge Constitution Bench struck down the scheme, deeming it ‘unconstitutional’ due to its complete anonymisation of contributions to political parties. Additionally, the Bench stated that the articulated objectives of curbing black money or illegal election financing did not warrant disproportionately infringing upon voters’ right to information.

FM Sitharaman said, some aspects of the scheme need improvement and they will be brought back following consultations.

She also lashed out at the Opposition’s claims that the BJP disregarded criminal charges against leaders who switched from other parties to join the ruling party.

The HT quoted her as saying, “The BJP can’t sit here and say, you come to my party today, and the case will be closed tomorrow. The case has to go through the courts that have to take a call; they will not just say, “Oh, he’s come to your party, close the case.” Doesn’t happen that way. So is this washing machine a term they want to use for the courts?”

She further said that the Union government plans to simplify the process of taxation and make it easy for investments to come through into the country.

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April 23,2024

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Mangaluru, Apr 23: As an outbreak of avian flu has been reported in some districts of neighbouring Kerala, the border areas of Karnataka, including Mangaluru, have been put on high alert, officials of the Karnataka Animal Husbandry department said.

At present, the situation in Kerala is being monitored before any action can be taken, they said.

“Our Kerala counterparts have assured us that the avian flu has been contained within Alappuzha district. However, loading, booking and carrying poultry and poultry products on trains and at railway stations are still under consideration (surveillance), the officials said.

Not only railways but also road transport ferrying chicken loads from Kerala to Mangaluru are under surveillance. Mangaluru, being one of the largest consumers of chicken from Kerala, has halted chicken procurement from Kerala-based suppliers.

Sudhakar Shetty, a market functionary, stated, “The animal husbandry department of Kerala has advised containment of avian flu within a few districts in Kerala. We are closely monitoring the situation.” Despite this, the market has not experienced significant fluctuations in supply yet, as local stocks have been adequate to meet the demand for the next few days.

Demand for chicken could fall for a few days due to a series of temple festivals in coastal areas, where many consumers refrain from consuming meat-based meals until Saturday. Nevertheless, Sunday could witness a change, as consumers may desire hot chicken curry for their Sunday meals, according to the local people.

As officials in the animal husbandry department in Dakshina Kannada have raised awareness in the market about avian flu in the neighbouring state, the question arises whether prices will fall if demand decreases.

“We do not want to contribute to the hysteria surrounding avian flu until our local stock falls below the level of demand,” said Aston D’Souza, a farm owner.

Dakshina Kannada also serves as a good market for suppliers from Shivamogga, Hassan, and Chikkamagaluru.

“In case supplies dwindle due to an unlikely prolonged shutdown of Kerala supplies, we can always purchase from those districts, albeit at a slightly higher cost than Kerala stock,” Shetty said.

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