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
May 11,2020

New Delhi, May 11: Shares of Indian Railway Catering And Tourism Corporation (IRCTC) jumped 5 per cent in early trade on Monday after the Indian Railways said it will gradually resume passenger train services from May 12.

The company's shares gained 5 per cent to Rs 1,302.85 -- its highest trading permissible limit for the day -- on the BSE. At the National Stock Exchange (NSE), it rose 5 per cent to Rs 1,303.55 -- its upper circuit limit.

Booking for reservation in these trains will start at 4pm on May 11 and will be available only on the IRCTC website.

The Indian Railways will gradually resume passenger train services from May 12 and will ask passengers to arrive at the station at least an hour before departure, the national transporter said on Sunday.

Initially, the all air-conditioned services will begin on 15 Rajdhani routes and the fare would be equivalent to that of the super-fast train, it said.

The special trains will run from New Delhi to Dibrugarh, Agartala, Howrah, Patna, Bilaspur, Ranchi, Bhubaneswar, Secunderabad, Bengaluru, Chennai, Thiruvananthapuram, Madgaon, Mumbai Central, Ahmedabad and Jammu Tawi.

All passenger services were suspended due to a lockdown announced on March 25 and the railways later started the on-demand Shramik Specials to ferry migrants stranded across the country. It, however, has been running freight and parcel services.

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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
January 8,2020

Sydney, Jan 8:  Authorities in Australia will begin five-day campaign to kill thousands of camels in the country as they drink too much water amid the wildfires.  The government will send helicopters to kill up to 10,000 camels in a five-day campaign starting Wednesday, The Hill reported citing The Australian.

Marita Baker, an Anangu Pitjantjatjara Yankunytjatjara (APY) (large, sparsely-populated local government area for Aboriginal Australians) executive board member, said that the camels were causing problems in her community of Kanypi.

"We have been stuck in stinking hot and uncomfortable conditions, feeling unwell, because the camels are coming in and knocking down fences, getting in around the houses and trying to get to water through air conditioners,'' she said.

The planned killing of the camels comes at a time the country is ravaged by wildfires since November. The disaster has killed more than a dozen people and caused the displacement or deaths of 480 million animals, according to University of Sydney researchers.

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