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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Agencies
January 4,2020

New Delhi, Jan 4: "Sovereign, socialist, secular, democratic republic" is how India is referred to in the preamble of the Constitution. However, J Nandakumar, a key RSS leader and All India Convenor Prajna Pravah, a Sangh offshoot, wants India to reconsider the inclusion of the word "secular", claiming secularism is a "western, Semitic concept".

In an exclusive interview to news agency, Nandakumar said: "Secularism is a western, Semitic concept. It came into existence in the West. It was actually against Papal dominance."

He argued that India does not need a secular ethos as the nation has moved "way beyond secularism" since it believes in universal acceptance as against the western concept of tolerance.

The RSS functionary on Thursday released a book here named "Hindutva in the changing times". The book launch event was also attended by senior RSS functionary Krishna Gopal.

Nandakumar, who has attacked the Mamata Banerjee government in his book for alleged "Islamisation of West Bengal", told IANS: "We have to see whether we need to put up a board of being secular, or that whether we should prove this through our behaviour, actions and roles."

It is for society to take a call on this, rather than by any political class, on whether the preamble to the Indian Constitution should continue to have the word "secular" in it or not, he added.

In between signing his books and obliging wannabe Hindutva cadres with selfies, Nandakumar said that the very existence of the word "secular" in the preamble was not necessary and how the constitution founders too were against it.

"Baba Saheb Ambedkar, Ladi Krishnaswamy Aiyaar -- all debated against it and said it (secular) wasn't necessary to be included in the preamble. That time it was demanded, discussed and decided not to include it," he said.

Ambedkar's opinion was, however, disregarded when Indira Gandhi "bulldozed" the word "secular", in 1976, said the head of the Prajna Pravah, an umbrella body of several right-wing think-tanks

As Nandakumar prepared to return to his base in Kerala, where, he emphasises, the RSS has its work cut out in the "fight against the Kunnor model", he said that the inclusion of "secular" was done with the intent to damage the concept of Hindutva.

"It was to demolish, destroy the overarching principle of Hindutva that binds us together", he said.

Asked whether the Sangh would pressurise the BJP, which has 303 seats in the Lok Sabha, to omit "secular" from the Constitution preamble, Nandakumar smilingly refused to reply.

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News Network
July 19,2020

New Delhi, Jul 19: With the highest single-day spike of 38,902 cases reported in the last 24 hours, India's total COVID-19 tally on Sunday reached 10,77,618, informed the Union Health and Family Welfare Ministry on Sunday.

The death toll has gone up to 26,816 with 543 fatalities reported in the last 24 hours.

The Health Ministry said the total number of cases includes 3,73,379 active cases and 6,77,423 patients have been cured/discharged/migrated.

Maharashtra remains the worst affected state with 3,00,937 cases reported until Saturday.
Meanwhile, as per the information provided by the Indian Council of Medical Research (ICMR), 1,34,33,742 samples have been tested for COVID-19 till July 18, of these 3,61,024 samples were tested yesterday.

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Agencies
July 2,2020

New Delhi, Jul 2: In the midst of India's tense border standoff with China, the defence ministry on Thursday approved procurement of a number of frontline fighter jets, missile systems and other platforms at a cost of Rs 38,900 crore to bolster the combat capability of the armed forces, officials said.

They said 21 MiG-29 fighter jets are being bought from Russia while 12 Su-30 MKI aircraft will be procured from Russia. The ministry has also approved a separate proposal to upgrade existing 59 MiG-29 aircraft.

The decisions were taken at a meeting of the Defence Acquisition Council (DAC) chaired by Defence Minister Rajnath Singh.

The procurement of 21 MiG-29 and upgrading of the existing fleet of MiG-29 are estimated to cost the government Rs 7,418 crore while purchase of 12 new Su-30 MKI from the Hindustan Aeronautics Ltd will be made at a cost of Rs 10,730 crore, the officials said.

The DAC also approved procurement of long-range land-attack cruise missile systems with a range of 1,000 KM and Astra Missiles for Navy and Air Force.

The officials said cost of these design and development proposals is in the range of Rs 20,400 crore.

"While acquisition of Pinaka missile systems will enable raising additional regiments over and above the ones already inducted, addition of long-range land attack missile systems having a firing range of 1000 KM to the existing arsenal will bolster the attack capabilities of the Navy and the Air Force," said a defence ministry official.

"Similarly induction of Astra Missiles having beyond visual range capability will serve as a force multiplier and immensely add to the strike capability of the Indian Navy and the Indian Air Force," he said.

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