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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News Network
November 15,2024

Udupi: The Tourism Department is planning a major eco-friendly development initiative for Kamini Island, located near the Blue Flag-certified Padubidri End Point beach, aiming to attract more visitors while maintaining environmental sustainability.

Assistant Director Kumar CU emphasized that, given the island’s proximity to the Blue Flag beach, all development efforts will center around eco-friendly practices. “We are looking to enhance the Kamini River and the island’s surroundings by adding a hanging bridge, nature trails, and eco-friendly food courts offering traditional cuisine. Visitors will also be able to reach the island by pedal boats or kayaking,” he said.

The development project is estimated to cost between Rs 3 crore and Rs 4 crore. Meanwhile, the Blue Flag beach, Padubidri, continues to see a steady flow of visitors. Vijay Shetty, manager of the beach, shared that tenders for food courts and water sports have been awarded to private parties. Recently, three new coracles have been introduced, which are proving to be a hit with visitors. Additionally, three more shelters are expected to be ready by November 20.

Shetty mentioned that the beach can now accommodate between 2,500 and 3,000 visitors daily, although footfall remains lower than other district beaches due to user fees and activity restrictions. “Initially, most visitors were from Mangaluru, but now nearly 40% come from other districts, showing a shift in the visitor demographics,” Shetty noted.

To further boost tourism and promote a healthy lifestyle, a Beach Carnival is set to take place on November 23-24, featuring the National Sea Swimming Championship and a sea marathon in collaboration with the Padubidri JCI, which is celebrating its golden jubilee. Cultural events will be held at the main beach, with some sports events taking place at the Blue Flag beach. Emphasis will be placed on making all activities environmentally friendly.

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News Network
November 22,2024

Mangaluru: A man fell victim to an online scam, losing Rs 1.7 crore after fraudsters posed as officials from TRAI. According to a complaint filed at the CEN police station, the incident began on November 11, when the complainant received a call from an unknown number at 9:49 am.

The caller, claiming to represent TRAI, alleged that another mobile number registered under the complainant's name was involved in illegal activities in Andheri (East), Mumbai. The caller further stated that an FIR was lodged against the complainant for harassment under the guise of marketing. He was instructed to contact Andheri (East) police station immediately or risk his mobile service being deactivated within two hours.

The complainant was subsequently connected to an individual named Pradeep Sawant, who claimed the complainant was implicated in a money laundering scheme linked to the Naresh Goyal fraud case. Sawant alleged that a fraudulent bank account under the complainant's name was opened at Canara Bank, Andheri, and used to purchase a SIM card for illegal activities. He warned that the complainant could face arrest.

Later, the complainant was contacted via WhatsApp video call by individuals posing as Rahul Kumar (a police officer) and Akanksha (a CBI officer). They allegedly sent fabricated CBI documents to his WhatsApp number. The fraudsters demanded money to "resolve" the case. Fearing threats, the complainant allegedly transferred Rs 1.7 crore through RTGS in batches of Rs 53 lakh, Rs 74 lakh, and Rs 44 lakh between November 13 and 19. A case has been registered at the CEN police station and an investigation is ongoing.

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News Network
November 14,2024

srirang.jpg

Bengaluru: The Prime Minister Narendra Modi led union government has requested the Karnataka High Court to direct the Mandya district administration and the state government to clear a madrasa operating within the premises of the historic Jama Masjid in Srirangapatna.

The Waqf Board, opposing this move, has claimed the mosque as its property and defended the right to conduct madrasa activities there.

The matter was brought before a division bench headed by Chief Justice N V Anjaria following a public interest litigation filed by a person named Abhishek Gowda from Kabbalu village in Kanakapura taluk. The petition alleged “unauthorised madrasa activities” within the mosque.

Representing the Central government, Additional Solicitor General of India for High Court of Karnataka, K Arvind Kamath argued that the Jama Masjid was designated as a protected monument in 1951, yet unauthorised madrasa operations continue there.

He noted that concerns over potential law and order issues have so far prevented any intervention. Kamath urged the court to direct the Mandya district administration to take action and vacate the madrasa from the mosque.

In defence, lawyers for the state government and the Waqf Board contested this request, stating that the Waqf Board had been recognised as the owner of the property since 1963 and, thus, conducting madrasa activities there is lawful.

After hearing both sides, the bench adjourned the case for further arguments, scheduling the next hearing for November 20.

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