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
July 29,2020

Dubai, Jul 29: Muslim pilgrims on Wednesday begin the annual Haj, downsized this year as the Saudi hosts strive to prevent a coronavirus outbreak during the five-day pilgrimage.

The Haj, one of the five pillars of Islam and a must for able-bodied Muslims at least once in their lifetime, is usually one of the world's largest religious gatherings.

But this year only up to 10,000 people already residing in the Kingdom will participate in the ritual, a tiny fraction of the 2.5 million pilgrims from around the world that attended last year.

"There are no security-related concerns in this pilgrimage, but (downsizing) is to protect pilgrims from the danger of the pandemic," said Khalid bin Qarar Al Harbi, Saudi Arabia's director of public security.

Pilgrims will be required to wear masks and observe social distancing during a series of religious rites that are completed over five days in the holy city of Makkah and its surroundings in western Saudi Arabia.

Those selected to take part in the Haj were subject to temperature checks and placed in quarantine as they began trickling into Makkah at the weekend.

State media showed health workers sanitising their luggage, and some pilgrims reported being given electronic wristbands to allow authorities to monitor their whereabouts.

Workers, clutching brooms and disinfectant, were seen cleaning the area around the Kaaba, the structure at the centre of the Grand Mosque draped in gold-embroidered cloth towards which Muslims around the world pray.

Haj authorities have cordoned off the Holy Kaaba this year, saying pilgrims will not be allowed to touch it, to limit the chances of infection.

They also reported setting up multiple health facilities, mobile clinics and ambulances to cater to the pilgrims.

Saudi authorities said only around 1,000 pilgrims residing in the Kingdom would be permitted for the Haj. Some 70 per cent of the pilgrims are foreigners residing in the Kingdom, while the rest will be Saudi citizens, authorities said.

All worshippers were required to be tested for coronavirus before arriving in the holy city of Makkah and will also have to quarantine after the pilgrimage as the number of cases in the Kingdom nears 270,000.

They were given elaborate amenity kits that include sterilised pebbles for a stoning ritual, disinfectants, masks, a prayer rug and the Ihram, a seamless white garment worn by pilgrims, according to a Haj ministry programme document.

"I did not expect, among millions of Muslims, to be blessed with approval," Emirati pilgrim Abdullah Al Kathiri said in a video released by the Saudi media ministry.

"It is an indescribable feeling... especially since it is my first pilgrimage."

The Haj ministry said non-Saudi residents of the Kingdom from around 160 countries competed in the online selection process but it did not say how many people applied.

Despite the pandemic, many pilgrims consider it safer to participate in this year's ritual without the usual colossal crowds cramming into tiny religious sites, which make it a logistical nightmare and a health hazard.

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News Network
June 16,2020

New Delhi, Jun 16: With an increase of 10,667 cases and 380 deaths in the past 24 hours, the COVID-19 count in India has reached 3,43,091 on Tuesday, according to the Union Health and Family Welfare Ministry.

It is noteworthy that today's spike in cases is lower than the 11,502 registered in the country yesterday and has also stayed below the 11 thousand mark it had been crossing for the past two days in a row.

However, there is an increase in the number of deaths due to the infection from yesterday, with 380 deaths being reported from across the country, the toll due to COVID-19 has now reached 9,900.

The COVID-19 count includes 1,53,178 active cases, while 1,80,013 patients have been cured and discharged or migrated so far.

Maharashtra with 1,10,744 cases continues to be the worst-affected state in the country with 50,567 active cases while 56,049 patients have been cured and discharged in the state so far. The toll due to COVID-19 has crossed the four thousand mark and reached 4,128 in the state.
It is followed by Tamil Nadu with 46,504 and the national capital with 42,829 confirmed cases.

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Agencies
January 11,2020

New Delhi, Jan 11: The Supreme Court is scheduled to hear the curative petition of two death row convicts in 2012 Nirbhaya gang-rape case on January 14.

A five-judge Bench of Justices N V Ramana, Arun Mishra, R F Nariman, R Banumathi and Ashok Bhushan will hear the petition filed by Vinay Sharma and Mukesh.

The duo had moved a curative petition in the top court after a Delhi court issued a death warrant in their name and announced January 22 as the date of their execution.

Besides them, two other convicts named Pawan and Akshay are also slated to be executed on the same day at 7 am in Delhi's Tihar Jail premises.

They were convicted and sentenced to death for raping a 23-year-old woman on a moving bus in the national capital on the night of December 16, 2012.

The victim, who was later given the name Nirbhaya, died at a hospital in Singapore where she had been airlifted for medical treatment.

A curative petition is the last judicial resort available for redressal of grievances. It is decided by the judges in-chamber.

If it is rejected, they are legally bound to move a mercy petition. It is filed before the President who has the power to commute it to life imprisonment.

The court after issuing a black warrant in their name gave them two weeks' time to file both the curative and mercy petition.

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