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.

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
February 18,2020

New Delhi, Feb 18: A Delhi court today sent Sharjeel Imam, who has been named as an "instigator" by the Delhi Police in its chargesheet on violent protests against the amended citizenship act at New Friends Colony near Jamia in Delhi last year, to judicial custody till March 3.

Sharjeel Imam was arrested on sedition charges last month.

The Delhi Police has filed a chargesheet before Chief Metropolitan Magistrate Gurmohina Kaur, naming Sharjeel Imam as an instigator of the violence.

It said it has attached CCTV footage, call detail records and statements of over 100 witnesses as evidence in the chargesheet.

The court had on Monday sent Sharjeel Imam to one-day custody of Delhi Police in the case.

Protestors had torched four public buses and two police vehicles as they clashed with police in New Friends Colony near Jamia Millia Islamia in Delhi during the demonstration against the CAA on December 15, leaving nearly 60 people including students, cops and fire fighters injured.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
June 15,2020

New Delhi, Jun 15: With an increase of 11,502 cases in the past 24 hours, the COVID-19 count in India reached 3,32,424 on Monday, according to the Union Health and Family Welfare Ministry.

The spike is marginally lower than the highest-ever spike of 11,929 new cases the country registered a day earlier.

With 325 deaths being reported from across the country, the toll due to COVID-19 has now reached 9,520.

The COVID-19 count includes 1,53,106 active cases while 1,69,798 patients have been cured and discharged or migrated so far.

Maharashtra with 1,07,958 cases continues to be the worst-affected state in the country with 53,030 active cases while 50,978 patients have been cured and discharged in the state so far. 3,950 deaths have been reported due to the infection so far from Maharashtra.

It is followed by Tamil Nadu with 44,661 cases and the national capital with 41,182 confirmed cases.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.
News Network
June 11,2020

Washington, Jun 11: Observing that historically India has been a tolerant, respectful country for all religions, a top Trump administration official has said the US is "very concerned" about what is happening in India over religious freedom.

The comments by Samuel Brownback, Ambassador-At-Large for International Religious Freedom, came hours after the release of the "2019 International Religious Freedom Report" on Wednesday.

Mandated by the US Congress, the report documenting major instances of violation of religious freedom across the world was released by Secretary of State Mike Pompeo at the State Department.

India has previously rejected the US religious freedom report, saying it sees no locus standi for a foreign government to pronounce on the state of its citizens' constitutionally protected rights.

"We do remain very concerned about what's taking place in India. It's historically just been a very tolerant, respectful country of religions, of all religions," Mr Brownback said during a phone call with foreign journalists on Wednesday.

The trend lines have been troubling in India because it is such a religious subcontinent and seeing a lot more communal violence, Mr Brownback said. "We're seeing a lot more difficulty. I think really they need to have a - I would hope they would have an - interfaith dialogue starting to get developed at a very high level in India, and then also deal with the specific issues that we identified as well," he said.

"It really needs a lot more effort on this topic in India, and my concern is, too, that if those efforts are not put forward, you're going to see a growth in violence and increased difficulty within the society writ large," said the top American diplomat.

Responding to a question, Mr Brownback said he hoped minority faiths are not blamed for the COVID-19 spread and that they would have access to healthcare amid the crisis.

Prime Minister Narendra Modi has criticised any form of discrimination, saying the COVID-19 pandemic affects everyone equally. "COVID-19 does not see race, religion, colour, caste, creed, language or border before striking. Our response and conduct thereafter should attach primacy to unity and brotherhood," PM Modi said in a post on LinkedIn in February.

The government, while previously rejecting the US religious freedom report, had said: "India is proud of its secular credentials, its status as the largest democracy and a pluralistic society with a longstanding commitment to tolerance and inclusion".

"The Indian Constitution guarantees fundamental rights to all its citizens, including its minority communities… We see no locus standi for a foreign entity/government to pronounce on the state of our citizens' constitutionally protected rights," the Foreign Ministry said in June last year.

According to the Home Ministry, 7,484 incidents of communal violence took place between 2008 and 2017, in which more than 1,100 people were killed.

Comments

Add new comment

  • Coastaldigest.com reserves the right to delete or block any comments.
  • Coastaldigset.com is not responsible for its readers’ comments.
  • Comments that are abusive, incendiary or irrelevant are strictly prohibited.
  • Please use a genuine email ID and provide your name to avoid reject.