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.

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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
July 22,2020

New Delhi, Jul 22: With a spike of 37,724 cases and 648 deaths reported in the last 24 hours, the total number of COVID-19 cases in India stands at 11,92,915, according to the Union Ministry of Health and Family Welfare.

The total number of cases includes 4,11,133 active cases, 7,53,050 cured/discharged/migrated and 28,732 deaths, the Health Ministry informed.

Maharashtra remains the worst affected state with 3,27,031 cases and 12,276 deaths.
The second worst-hit state, Tamil Nadu has reported 1,80,643 COVID-19 cases so far while Delhi has reported 1,25,096 cases, according to the Ministry.

Other states that have witnessed a higher number of COVID-19 positive cases include, Andhra Pradesh with 58,668 cases, Karnataka with 71,069 while Telangana has reported 47,705 COVID-19 positive cases.

Meanwhile, as per the information provided by the Indian Council of Medical Research (ICMR), the total number of samples tested up to July 21 is 1,47,24, 546 including 3,43,243 samples tested yesterday.

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Agencies
March 13,2020

Amid the rapid spread of the novel coronavirus (COVID-19), which has infected 73 people in India and killed more than 4,500 individuals globally, doctors have advised that in addition to regularly washing hands, one should also disinfect their smartphone every 90 minutes with alcohol-based hand sanitizer.

Ravi Shekhar Jha, Head of Department at Fortis Escorts Hospital in Faridabad said the best method to disinfect your smartphone is to use regular doctor spirit or the alcohol-based hand sanitizer at least every 90 minutes.

"Avoid touching your eyes, mouth, or nose. The best option is to use a phone cover or a Bluetooth device and try to touch your phone as less as possible. We would also recommend cleaning your phone at least twice a day," Jha told IANS.

According to research, published in 2018 by Insurance2Go, a gadget insurance provider, revealed that smartphone screens have three times more germs than a toilet seat.

One in 20 smartphone users was found to clean their phones less than every six months, said the study.

"In the time of fear of coronavirus, smartphones should also be disinfected with alcohol-based sanitizer rub. Pour few drops of sanitizer on a tiny clean cotton pad and rub it safely on your entire phone," said Jyoti Mutta, Senior Consultant, Microbiology, Sri Balaji Action Medical Institute in New Delhi.

"You can repeat this process every evening coming back home after an entire day out at work and once in the morning before going out," Mutta added.

"Maintain basic cleanliness, and try to avoid using other's phones especially if suffering from respiratory illness or flu-like symptoms as there is no other way to disinfect these regular gadgets," she stressed.

Another study from the University of Surrey in the UK, also found that the home button on your smartphone may be harbouring millions of bacteria - some even harmful.

The World Health Organisation (WHO) declared the novel coronavirus as a global pandemic on Wednesday. The death toll of COVID-19 has crossed the 4,500 marks and confirmed cases globally have touched one lakh as per the reports.

According to Suranjeet Chatterjee, Senior Consultant in Internal Medicine Department of Indraprastha Apollo Hospitals in New Delhi, "We should frequently wash our hands, cover our coughs and it is important to adapt to other good hygiene habits that are most important in such a situation."

"Coronavirus and other germs can live on surfaces like glass, metal or plastics and phones are bacteria-ridden. It is necessary that we sanitize our hands frequently and make sure that our hands are clean all the time," Chatterjee told IANS.

"The emphasis should be laid on sanitising our hands rather than sanitizing the phone - once in a while the phone can be sanitized under the guidance of the makers of the phone," Chatterjee stressed.

According to the global health agency, the most effective way to protect yourself against coronavirus is by frequently cleaning of your hands with alcohol-based hand rub or washing them with soap and water.

The WHO's report showed the virus infects people of all ages, among which older people and those with underlying medical conditions are at a higher risk of getting infected.

People should eat only well-cooked food, avoid spitting in public, and avoid close contact, the WHO said, adding that it is important for people to seek medical care at the earliest if they become sick.

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News Network
June 16,2020

New Delhi, Jun 16: Jet fuel or ATF price on Tuesday was hiked by 16.3 per cent while petrol price was increased by 47 paise per litre and that of diesel by a record 93 paise on the back of firming international oil rates.

Aviation turbine fuel (ATF) price was hiked by ₹5,494.5 per kilolitre (kl), or 16.3 per cent, to ₹39,069.87 per kl in the national capital, according to a price notification by state-owned oil marketing companies.

This is the second straight increase in ATF price this month. Rates were hiked by a record 56.5 per cent (₹12,126.75 per kl) on June 1.

Simultaneously, petrol and diesel prices were hiked for the 10th day in a row.

Petrol price in Delhi was hiked to ₹76.73 per litre from ₹76.26, while diesel rates were increased to ₹75.19 a litre from ₹74.26, the price notification said.

In 10 hikes, petrol price has gone up by ₹5.47 per litre and diesel by Rs 5.8 a litre.

Rates have been increased across the country and vary from state to state depending on the incidence of local sales tax or VAT.

The hike in diesel rates is the highest daily increase since the state-owned fuel retailers started daily revision in rates in May 2017.

Hike for 10th consecutive day

Tuesday’s increase in petrol and diesel price marks the 10th straight day of rise in rates since oil companies on June 7 restarted revising prices in line with costs, after ending an 82-day hiatus.

The freeze in rates was imposed in mid-March soon after the government hiked excise duty on petrol and diesel to shore up additional finances.

Oil PSUs Indian Oil Corp (IOC), Bharat Petroleum Corp Ltd (BPCL) and Hindustan Petroleum Corp Ltd (HPCL) instead of passing on the excise duty hikes to customers adjusted them against the fall in the retail rates that was warranted because of fall in international oil prices.

The June 1 hike in jet fuel price had come after seven consecutive reductions in rates since February. ATF price in Delhi before the reduction cycle began in February was ₹64,323.76 per kilolitre, which got reduced to ₹21,448.62 last month.

Industry officials said the hike was necessitated because benchmark international rates have bounced back from a two-decade low.

While ATF prices are revised on 1st and 16th of every month, petrol and diesel prices are revised on a daily basis.

Oil companies used to revise ATF prices on the first of every month, but adopted fortnightly revisions on March 21 to pass on the benefit of falling international oil prices to airlines.

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