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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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
January 17,2020

New Delhi, Jan 17: Airports in Srinagar and Jammu are to be “immediately” brought under the security cover of the CISF in view of the arrest of DSP Davinder Singh, a Jammu and Kashmir government order has said.

The two sensitive airports are to be “handed over” to the CISF by January 31, the order of the Jammu and Kashmir Home Department to the Director General of Police (DGP) said.

“This issue (CISF security at Srinagar and Jammu airports) has acquired immediacy in view of the recent developments relating to the arrest of Davinder Singh, DSP airport security, for trying to assist militants to travel to other parts of the country,” the order issued on Wednesday said.

Police had arrested Singh, a deputy superintendent of police, at Mir Bazar in Jammu and Kashmir’s Kulgam district on Saturday, along with Hizbul Mujahideen terrorists Naveed Baba and Altaf, besides a lawyer who was operating as an overground worker for terror outfits.

The two airports are guarded by the CRPF and the J-K Police at present.

The Union government had last year decided that the Central Industrial Security Force (CISF) will be handed over security of these two airports along with the one in Leh in view of their sensitive and strategic location and the threats it faced related to possible terrorist and hijack attempts.

CISF is the national civil aviation security force and at present it guards 61 airports including the ones at Delhi and Mumbai.

News agency had on January 13 reported that the Union home ministry sanctioned about 800 personnel to the CISF in order to take over security duties at the three airports of the newly created Union Territories of Jammu and Kashmir and Ladakh.

As per the original plan, the CISF was to take over Jammu airport by next month and the Srinagar and Leh airports after the spell of severe cold ends.

However, officials said, keeping in mind the arrest of the DSP and his alleged links, the latest order has been issued which also directs the J-K Police to make arrangements for accommodation, transport and other logistical requirements of the armed contingent of the CISF on a quick basis.

Once inducted at the most-sensitive Srinagar airport, the CISF will secure access control at both city and air side (tarmac area) while the CRPF will be responsible for securing the outer periphery. At the Jammu airport, the peripheral security duties will be rendered by the JK Police.

An assortment of surveillance and security gadgets like CCTVs, observation monitors, hand-held metal detectors, bullet-proof patrol vehicles and bomb detection and disposal equipment are also being provided by the airport operator, the Airports Authority of India (AAI), to the CISF.

The Union government sometime back made it clear that CISF will be the only civil airports guarding force and all such facilities in the country will be gradually brought under its command to bolster aviation security and tighten anti-terror and anti-hijack protocols.

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News Network
January 13,2020

New Delhi, Jan 13: The Delhi High Court on Monday sought response of the city police, Delhi government, WhatsApp Inc, Google Inc and Apple Inc on a plea of three JNU professors to preserve data, CCTV footage and other evidence relating to the January 5 violence on the varsity campus.

The Delhi Police informed the court that it has asked the JNU administration to preserve and hand over CCTV footage of the violence.

Justice Brijesh Sethi listed the matter for further hearing on Tuesday.

The court was told by Delhi government Standing Counsel (criminal) Rahul Mehra that the police has not yet received any response from the university administration.

The counsel said police has also written to WhatsApp to preserve data of two groups "Unity Against Left" and "Friends of RSS" including messages, pictures and videos and phone numbers of members, related to JNU violence incident.

The petition was filed by JNU professors Ameet Parameswaran, Atul Sood and Shukla Vinayak Sawant seeking necessary directions to the Delhi Police Commissioner and Delhi government.

The petition also sought direction to the Delhi Police to retrieve all CCTV footage of JNU campus.

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