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
March 13,2020

New Delhi, Mar 13: Delhi's Tis Hazari Court on Friday sentenced expelled Bharatiya Janata Party (BJP) MLA Kuldeep Singh Sengar and six others to 10 years imprisonment for the death of Unnao rape survivor's father. Sengar is already serving life imprisonment for raping the minor.

While sentencing them, District Judge Dharmesh Sharma said, "There can be no denying that rule of law was broken. Sengar was a public functionary and had to maintain the rule of law. The way the crime has been committed, it does not call for leniency."

Sengar and his brother Atul has been directed to give 10 lakh compensation to family of the victim for loss of their father. "There are four minor children involved, three girls and one boy. They have also been uprooted from native place," the judge said.

Seven people, including Sengar, his brother and two police personnel, were held guilty for culpable homicide and criminal conspiracy, earlier this month.

The case pertains to the death of rape survivor's father in custody on April 9, 2018. It was alleged that he was assaulted following a quarrel with some of the accused in the case.

He was taken to the police station and then framed for allegedly possessing an illegal firearm. Pursuant to this, he was sent to custodial remand, during which he died.

The case was transferred to Delhi from a trial court in Uttar Pradesh on the Supreme Court's directions in August last year. Both the death and illegal firearm case was later clubbed by the court.

During the arguments on sentencing on March 12, Sengar had told the court that he should be "hanged and acid poured into his eyes if he has done anything wrong".

The former MLA had also raped the daughter of the deceased in 2017 in Uttar Pradesh's Unnao district and was sent to jail for "remainder of his natural biological life", last year.

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News Network
March 9,2020

New Delhi, Mar 9: The Centre and the Delhi government are working in close coordination to deal with coronavirus, Chief Minister Arvind Kejriwal said here on Monday.

Talking to reporters after a review meeting with Union Health Minister Harsh Vardhan on the preparedness for COVID-19, the chief minister said people arriving from foreign countries are being screened at airports.

A campaign will be run to make people aware of the preventive measures to contain the spread of the disease, Kejriwal said.

Health Ministry sending directives to states: Vardhan

Health Minister Harsh Vardhan said the government is prepared to deal with novel coronavirus and his ministry is sending directives, including guidelines, to states in all the languages on ways to contain it.

"We are sending detailed guidelines to all states on ways to contain coronavirus. Have asked states to strengthen laboratories and manpower to effectively deal with coronavirus and form early rapid action teams," Vardhan told reporters adding, that the government is prepared to deal with the infection.

Vardhan stressed on a coordinated action between all concerned departments and agencies for activities such as contact tracing, community surveillance, hospital management, identification of isolation wards, ensuring adequate personal protection equipment and masks and risk communication for mass awareness.

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News Network
June 2,2020

New Delhi, Jun 2: India on Tuesday reported 8,171 more COVID-19 cases and 204 deaths in the last 24 hours as the country's virus count inches closer to two lakh, according to the Union Ministry of Health and Family Welfare.

The total number of cases in the country now stands at 1,98,706 including 97,581 active cases, 95,527 cured/discharged/migrated and 5,598 deaths.

Cases in Maharashtra have crossed 70,000 including over 30,000 recovered while Tamil Nadu's COVID-19 tally jumped to 23,495.

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