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
June 10,2020

New Delhi, Jun 10: India on Wednesday reported a spike of 9,985 more COVID-19 cases in the last 24 hours, taking the country's COVID-19 count to 2,76,583, according to the Union Ministry of Health and Family Welfare.

279 deaths were reported in the last 24 hours taking the total death toll to 7,745.

The total number of active cases has reached 1,33,632 while 1,35,205 patients have recovered. While one person has migrated.

With 90,787 cases, Maharashtra reported the highest number of coronavirus cases in the country followed by Tamil Nadu with 34,914 cases.

According to the Indian Council of Medical Research (ICMR), 1,45,216 samples were tested in the last 24 hours while overall 50,61,332 samples have been tested so far.

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News Network
June 25,2020

New Delhi, Jun 25: India registered its worst single-day increase in COVID-19 cases on Thursday, recording more than 16,000 coronavirus infections, to push the overall tally to 4.73 lakh as the number of fatalities also jumped by 418, the Union Health Ministry said.

This was the sixth consecutive day when coronavirus cases increased by more than 14,000. On June 20, the country registered an increase of 14,516 cases. On June 21, the increase was of 15,413 cases; 14,821 cases on June 22; 14,933 cases on June 23; and 15,968 cases on June 24.

Consequently, India added 92,573 cases since June 20, and over 2.82 lakh this month since June 1.

The health ministry data updated at 8am on Thursday showed the daily tally increased by the highest-ever 16,922 cases to reach 4,73,105, while the total deaths climbed to 14,894 with 418 new fatalities.

However, according to the data, the recovery rate has improved to 57.43 per cent. The number of active cases stands at 1,86,514 while 2,71,696 people have recovered; one patient has migrated.

The total number of confirmed cases included foreigners.

According to ICMR, a total of 75,60,782 samples have been tested up to June 24 with 2,07,871 samples being tested on Wednesday.

Of the 418 new deaths, 208 were in Maharashtra, 64 in Delhi, 33 in Tamil Nadu, 25 in Gujarat, 14 in Karnataka, 11 in West Bengal, 10 each in Rajasthan and Haryana, nine in Madhya Pradesh, eight each in Uttar Pradesh and Punjab, five each in Andhra Pradesh, Telangana and Uttarakhand.

Bihar, Goa and Jammu and Kashmir have reported one COVID-19 fatality each.

Of the total fatalities, Maharashtra tops the tally with 6,739 deaths followed by Delhi (2,365), Gujarat (1,735), Tamil Nadu (866), Uttar Pradesh (596), West Bengal (591), Madhya Pradesh (534), Rajasthan (375) and Telangana (225).

The COVID-19 death toll reached 188 in Haryana, 164 in Karnataka, 124 in Andhra Pradesh, 113 in Punjab, 88 in Jammu and Kashmir, 57 in Bihar, 35 in Uttarakhand, 22 in Kerala and 17 in Odisha.

Chhattisgarh has registered 12 deaths, Jharkhand 11, Assam and Puducherry nine each, Himachal Pradesh eight, Chandigarh six, Goa two and Meghalaya, Tripura and Ladakh have reported one fatality each.

More than 70 per cent deaths took place due to comorbidities, the health ministry said.

Maharashtra has reported the highest number of cases at 1,42,900 followed by Delhi at 70,390, Tamil Nadu at 67,468, Gujarat at 28,943, Uttar Pradesh at 19,557, Rajasthan at 16,009 and West Bengal at 15,173, according to ministry data.

The number of COVID-19 cases has gone up to 12,448 in Madhya Pradesh, 12,010 in Haryana, 10,444 in Telangana,10,331 in Andhra Pradesh and 10,118 in Karnataka.

It has risen to 8,209 in Bihar, 6,422 in Jammu and Kashmir, 6,198 in Assam and 5,752 in Odisha. Punjab has reported 4,627 novel coronavirus infections so far, while Kerala has 3,603 cases.

A total of 2,623 people have been infected by the virus in Uttarakhand, 2,419 in Chhattisgarh, 2,207 in Jharkhand, 1,259 in Tripura, 970 in Manipur, 951 in Goa, 941 in Ladakh and 806 in Himachal Pradesh.

Puducherry has recorded 461 COVID-19 cases, Chandigarh has 420, Nagaland has 347, Arunachal Pradesh has 158 and Mizoram has 142 cases.

Dadra and Nagar Haveli and Daman and Diu together have reported 120 COVID-19 cases.

Sikkim has 84, Andaman and Nicobar Islands has registered 56 infections so far while Meghalaya has recorded 46 cases.

"Our figures are being reconciled with the ICMR (Indian Council of Medical Research)," the ministry said, adding 8,493 cases are being reassigned to states.

State-wise distribution is subject to further verification and reconciliation, it added.

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News Network
February 29,2020

New Delhi, Feb 29: Amid the raging communal violence in the entire north-east Delhi earlier this week, there were people who were trying to save persons and families from the "other community" from the fury of the mobs of their own community.

Naeem Ali Pradhan, 34, from Shiv Vihar, helped at least 7-8 Hindus on the night of February 24 -- when the violence was at its peak-- escape to safer locations. Shiv Vihar is one of the worst affected areas in the violence.

According to Naeem Ali, that night mobs attacked dozens of shops on the road and later tried to enter inside the residential areas.

Suddenly, he spotted a group of youth who were looking hassled and frantically asking for directions.

"I saw them. Thye were Hindus who were trying to escape a mob looking to target them. They had lost their way inside the streets of our colony. I along with other Muslim men escorted them to the nearby Hindu locality," Naeem, who is also a member of the Aman Committee constituted by the Delhi police, told ANI.

"Several shops which were on the roads including some showrooms were attacked by a group. These Hindus were worried as a mob which was on the main road was attacking people. They asked me the address of a colony as they were unable to find their way," Naeem said.

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