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
February 1,2020

New Delhi, Feb 1: Activist Sharjeel Imam's mobile phone and laptop along with some anti-CAA posters have been seized from his house in Bihar's Jehanabad and rented flat in Vasant Kunj, police said on Friday.

Imam was arrested by the Delhi Police's Crime Branch from Jehanabad in a sedition case and he is being questioned by police for his alleged inflammatory speeches in Aligarh and at the Jamia Millia Islamia University here.

During investigation, a laptop and a desktop belonging to Imam were recovered from his rented flat at Vasant Kunj, Deputy Commissioner of Police (Crime) Rajesh Deo said.

His mobile phone was recovered from his house at his native place in Jehanabad's Kako area on the instance of his brother, he said.

Imam had prepared anti-CAA and anti-NRC pamphlets with "misleading and intimidating facts" and then distributed them in various mosques, the copy of which have been recovered, police said.

The shop from where he made photocopies of the pamphlets has also been identified, they added.

Imam was arrested on Tuesday. He was brought to Delhi on Wednesday and produced at the residence of Chief Metropolitan Magistrate Purushottam Pathak in the evening amid tight security after which police were granted his five-day custody.

The PhD scholar at the Jawaharlal Nehru University's Centre for Historical Studies has been booked for sedition and other charges in several states after videos of his alleged inflammatory speeches, made during protests against the Citizenship (Amendment) Act (CAA), were circulated on the social media.

An FIR was registered against Imam by the Delhi Police on January 25 under IPC sections 124A (sedition) and 153A (promoting or attempting to promote disharmony or feelings of enmity on grounds of religion, race, place of birth, residence, language, caste or community or any other ground whatsoever) among others.

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News Network
July 5,2020

New Delhi, Jul 5: With highest-ever single-day spike of 24,850 COVID-19 cases in 24 hours, India's coronavirus count stood at 6,73,165, informed the Union Ministry of Health and Family Welfare on Sunday.

Out of the total cases, 2,44,814 are active cases. On the other hand, India's cured/discharged patients count crossed the 4 lakh mark with 4,09,082 patients cured/discharged and one patient migrated.

As many as 613 deaths due to coronavirus were reported in the country in the last 24 hours taking the death toll in the country to 19,268.

Meanwhile, the ministry said that collective and focused efforts for containment and management of COVID-19 by the government of India along with the States/UTs have led to the number of recovered cases among COVID-19 patients rise to 4,09,082 as of today.

"During the last 24 hours, a total of 14,856 COVID-19 patients have been cured. So far, there are 1,64,268 more recovered patients than COVID-19 active cases. This takes the national recovery rate amongst COVID-19 patients to 60.77 per cent," the ministry said.

"With 786 labs in government sector and 314 private labs, there are as many as 1,100 labs in India," it added.

As per the Health Ministry, coronavirus cases in Maharashtra -- the worst affected state from the infection -- has breached the 2 lakh mark with 2,00,064 cases including 8,671 deaths.

Tamil Nadu reported 4,150 fresh COVID-19 cases and 60 deaths today, taking total cases to 1,11,151 and death toll to 1,510. Number of active cases stands at 46,860, according to the State Health Department.

Delhi's coronavirus tally nears the 1 lakh mark with 99,444 cases and the number of people succumbing to the virus stands at 3,067 in the national capital. As many as 9,873 RT-PCR tests and 13,263 rapid antigen tests were conducted today in Delhi. Total tests done so far stands at 6,43,504.

Meanwhile, Indian Council of Medical Research informed that the total number of samples tested up to July 4 is 97,89,066 of which 2,48,934 samples were tested yesterday.

There were seven new COVID-19 cases in the last 24 hours in Chandigarh, taking total cases to 466 including 395 recoveries and six deaths.
Himachal Pradesh Health Department informed that COVID-19 cases reach 1,048 in the state, of which, 309 cases are active and 715 have recovered.

Andhra Pradesh has reported 998 new COVID-19 cases and 14 deaths in the last 24 hours, according to a media bulletin released by AP state COVID nodal officer.

A total of 1,155 COVID-19 cases were reported in the last 24 hours in Uttar Pradesh on Sunday, taking the total number of active cases to 8,161 in the state, an official said. According to the official data, a total of 18,761 people have been cured while 785 people have died due to the virus in the state.

Eighteen more personnel of Indo-Tibetan Border Police (ITBP) tested positive for COVID-19 in the last 24 hours. There are total 151 active cases and 270 have recovered till date.

While, in the last 24 hours, 36 more Border Security Force (BSF) personnel tested positive for COVID-19 and 33 have recovered. There are 526 active cases and 817 personnel have recovered till date.

In Rajasthan, 224 fresh COVID-19 positive cases and 6 deaths were reported today. The total number of cases rose to 19,756 including 3,640 active cases and 453 deaths.

Odisha reported 469 new COVID19 positive cases in the last 24 hours, taking the total number of positive cases in the state to 9,070 including 5,934 recovered cases and 3,090 active cases, according to the health department.

Uttarakhand reported 31 new COVID-19 cases in the last 24 hours, taking total cases to 3,124. Recovery rate among COVID-19 patients stands at 80.79 per cent.

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News Network
February 17,2020

Mumbai, Feb 17: The Shiv Sena on Monday said the ongoing preparation for the much awaited visit of US President Donald Trump is a reflection of the "slave mentality" of Indians.

Trump's India trip is like the visit of a "Badshah" (emperor), an editorial in Sena mouthpiece 'Saamana' said.

Taking a dig at the construction of a wall on a plot having several slum structures in Ahmedabad ahead of Trump's visit there, the Sena said the US president's trip would neither stop the fall of rupee's value in forex market nor offer betterment to those (slum dwellers) behind the wall.

"Before Independence, British King or Queen used to visit one of their slave nations like India. The kind of preparations going on from taxpayers' money for the arrival of Trump is similar to it. This reflects the slave mentality of Indians," it said.

The Sena also took a swipe at Prime Minister Narendra Modi over the Ahmedabad Municipal Corporation's (AMC) move to build wall on a plot to "hide the slums" on the route through which Trump's convoy would pass.

"Former prime minister Indira Gandhi had once given the slogan 'Garibi Hatao', which was ridiculed for a long time. It seems now Modi's plan is 'Garibi chupao' (hide poverty)," the Marathi publication said.

Is there any financial allocation for such a wall being built in Ahmedabad? Is the US going to offer loan to India to build such walls across the country? it wondered.

"We have heard Trump is going to be in Ahmedabad for only three hours but the wall construction is costing almost Rs 100 crore to the state exchequer," it said.

It is basically a political arrangement between Prime Minister Modi and US President Trump, the Sena claimed.

Last year, 'Howdy, Modi!' (a mega event jointly addressed by the Indian prime minister and Trump) was organised in the US, it noted.

A similar programme, "Kem Chho Trump" (Gujarati expression for how are you Trump), has been now organised (in Ahmedabad) ahead of the US elections, chiefly because of a sizable number of Gujarati people living in America, the Shiv Sena claimed.

"But this visit of President Trump is neither going to stop further fall of rupee in the forex market nor offer betterment to those behind the wall (being built in front of slums in Ahmedabad)," it said.

The Sena said Trump is "not someone very wise or a statesman or someone who cares for the whole world", but he has to be treated with respect as he represents the mighty US.

"Sometimes you have to treat someone with respect to get your things done," it quipped.

The AMC on Friday said the construction of the wall, around four feet in height, was approved much before Trump's Gujarat visit was finalised.

Trump is scheduled to visit Modi's home state Gujarat on February 24.

He will visit the famous Sabarmati Ashram in Ahmedabad and take part in a roadshow with Modi. After that, the two leaders will inaugurate a new cricket stadium in Motera and address a gathering there, with an expected audience of over a lakh people.

While it was earlier speculated that the programme would be called 'Kem Chho Trump', the Ahmedabad Municipal Corporation on Sunday tweeted a series of posters confirming that the event is now christened as 'Namaste Trump', apparently to give it a pan-India appeal.

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