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
May 30,2020

New Delhi, May 30: The COVID-19 pandemic has left the Indian private healthcare sector in acute financial distress, a new survey said on Friday adding that the healthcare facilities in the country have witnessed at least 80 per cent fall in average revenue.

Post the lockdown from March 24, Indian hospitals have seen a large impact, especially among small and medium-sized hospitals, which are now facing existential challenges.

The survey by healthcare industry body NATHEALTH was conducted in 251 healthcare facilities across nine states and 69 cities to assess the impact of COVID-19 on the domestic healthcare industry.

The findings showed that 90 per cent of the surveyed healthcare facilities are facing financial challenges with 21 per cent facilities facing an existential threat.

"There is a need for a stimulus package to revive the Indian healthcare industry which will be crucial to provide much-needed relief to the healthcare sector which is the frontline defence in this fight against COVID-19," said Dr Sudarshan Ballal, President NATHEALTH.

According to the survey, hospitals in tier 1 and tier 2 cities are experiencing a 78 per cent reduction in OPD footfalls, and a drop of 79 per cent in in-patient admissions.

The study found that 90 per cent of organisations require some form of financial assistance.

The findings indicated that even after the lockdown lift, the situation will remain difficult for the hospitals and nursing homes as patients will hesitate from visiting hospitals.

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News Network
February 27,2020

New Delhi, Feb 27: Congress leader Priyanka Gandhi Vadra on Thursday attacked the government over the transfer of Delhi High Court Judge S Muralidhar, saying the Centre's attempts to "muzzle" justice and "break people's faith in an upright judiciary are deplorable".

Delhi HC Judge S Muralidhar was transferred to the Punjab and Haryana High Court, days after the Supreme Court collegium made the recommendation.

"The midnight transfer of Justice Muralidhar isn't shocking given the current dispensation, but it is certainly sad & shameful," Priyanka Gandhi tweeted. "Millions of Indians have faith in a resilient & upright judiciary, the government’s attempts to muzzle justice & break their faith are deplorable," she said.

The judge was hearing the Delhi violence case and the late evening notification came on the day when a bench headed by him expressed "anguish" over the Delhi Police's failure to register FIRs against alleged hate speeches by three BJP leaders.

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News Network
June 20,2020

New Delhi, Jun 20: With the highest single-day increase of 14,516 COVID-19 cases reported in the last 24 hours, India's coronavirus count stood at 3,95,048 on Saturday.

The death toll has gone up to 12,948 in the country with 375 persons succumbing to the infection.

According to the Union Ministry of Health and Family Welfare, the total number of cases includes 1,68,269 active cases, 2,13,831 cured/discharged/migrated and 12,948 deaths.

Maharashtra with 1,24,331 cases continues to be the worst-affected state in the country with 55,665 active cases while 62,773 patients have been cured and discharged in the state so far. The death toll due to COVID-19 stands at 5,893 in the state.

The number of confirmed cases in Tamil Nadu also crossed the 50 thousand mark on Saturday and reached 54,449.

The national capital is the third-worst affected by the infection in the country with the count reaching 53,116 today.

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