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
February 9,2020

New Delhi, Feb 8: Arvind Kejriwal is set to return as Delhi chief minister and his Aam Aadmi Party (AAP) will virtually sweep the assembly elections, exit polls predicted Saturday.

As polling came to a close at 6 pm, with the Election Commission of India (ECI) projecting a voter turnout at 60.24% (as of 9:50 pm), a poll of polls covering 10 exit polls gave 52 seats to AAP, 17 to the Bharatiya Janata Party and one to the Indian National Congress.

The polls, which are sample surveys conducted among voters exiting polling booths, signalled that the Delhi voter responded to AAP’s campaign that focused on “kaam”, or getting work done.

Kejriwal, a former civil servant and activist who stormed into electoral politics with an anti-corruption campaign in 2013, led a campaign focusing on the development work his government did in Delhi, especially in education and healthcare, as well as sops such as lower electricity bills and free bus rides for women.

The exit polls gave AAP between 47 and 68 seats in the 70-member Assembly.

They predicted an absolute rout for Congress, which ruled Delhi for three terms between 1998 and 2013. The maximum seats to AAP were given by India Today TV-Axis exit poll, which predicted 59-68 seats for the party, while giving 2-11 for the BJP and none to the Congress.

If these figures hold, the results will come as a disappointment for the BJP, which had hoped its sweep in the Lok Sabha elections in 2019 would reflect in the assembly polls.

Delhi’s voter turnout saw a sharp fall over the 2015 elections. According to the Election Commission of India, voter turnout till 9 pm was projected at 60.24% — lower than 67.12% in 2015.

Traditionally, a lower voter turnout is read as a vote for the incumbent.

The voter turnout in Delhi has been similar during the Congress regime under Sheila Dikshit, when she won consecutive terms. In 2003, when Delhi voted a second time for the Dikshit government, the voter turnout was 53.42%, and a comparable 57.58% was the turnout in 2008.

Later, in two consecutive elections — 2013 and 2015 — voters turned out in big numbers to vote Dikshit out of power. In 2013, 65.63% of Delhi turned out and the percentage increased further to 67.12% in 2015.

Across constituencies, Matia Mahal in Central Delhi registered the highest voter turnout of 68.36%, whereas Bawana assembly constituency in North district saw the lowest turnout at 41.95%. Among districts, North East district registered the highest (62.75%) voter turnout, while the lowest turnout was recorded in South East district (54.15%), according to the ECI app.

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Agencies
July 22,2020

Houston, Jul 22: China said on Wednesday that the US has ordered it to close its consulate in Houston in what an official called an outrageous and unjustified move that will sabotage China-US relations.

Foreign ministry spokesperson Wang Wenbin condemned the action, which comes as tensions rise between the world's two largest economies. He warned of firm countermeasures if the US does not reverse its decision.

The unilateral closure of China's consulate general in Houston within a short period of time is an unprecedented escalation of its recent actions against China, Wang said at a daily news briefing.

There was no immediate confirmation or explanation from the U.S. side.

Media reports in Houston said that authorities had responded to reports of a fire at the consulate. Witnesses said that people were burning paper in what appeared to be trash cans, the Houston Chronicle reported, citing police.

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News Network
June 22,2020

New Delhi, Jun 22: With an increase of 14,821 new cases and 445 deaths, India's COVID-19 count reached 4,25,282 on Monday.

According to the latest update by the Union Ministry of Health and Family Welfare (MoHFW), 13,699 deaths have been recorded due to the infection so far in the country.

The rise in confirmed cases today is lower than the highest spike of 15 thousand plus cases registered on Sunday.

The count includes 1,74,387 active cases, and 2,37,196 cured/discharged/migrated patients.

Maharashtra with 1,32,075 confirmed cases remains the worst-affected by the infection so far in the country. The state's count includes 60,161 active, 65,744 cured, discharged patients while 6,170 deaths have been reported due to the infection so far.

Meanwhile, the national capital today became the second-worst affected region in the country with the number of confirmed cases in Delhi reaching 59,746 as opposed to Tamil Nadu's 59,377 cases.

While 2,175 deaths have been reported in Delhi due to the infection so far, the toll in Tamil Nadu stands at 757.

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