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
March 23,2020

Singapore, Mar 23: Oil prices fell at the open in Asia on Monday after a trillion-dollar Senate proposal to help the coronavirus-hit American economy was defeated and death tolls soared across Europe and the US.

US benchmark West Texas Intermediate initially tumbled more than three percent but then pulled back some ground to trade 1.5 percent lower, at $22 a barrel.

Brent crude, the international benchmark, fell 4.9 percent to $25 a barrel.

Prices have fallen to multi-year lows in recent weeks as lockdowns and travel restrictions to fight the virus hit demand, and top producers Saudi Arabia and Russia engage in a price war.

The latest drop came after a trillion-dollar Senate proposal to rescue the US economy was defeated after receiving zero support from Democrats, and with five Republicans absent from the chamber because of virus-related quarantines.

The bill had proposed funding for American families, thousands of shuttered or suffering businesses and the nation's critically under-equipped hospitals.

Coronavirus deaths soared across Europe and the United States at the weekend despite heightened restrictions.

The death toll from the virus -- which has upended lives and closed businesses and schools across the planet -- surged to more than 14,300 Sunday, according to an AFP tally.

AxiCorp chief markets strategist Stephen Innes said that "total demand devastation" had set it.

"Oil markets collapsed out of the gate this morning as prices react... to stringent containment lockdown measures," he said.

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News Network
January 12,2020

Patna, Jan 12: Prashant Kishor, national vice-president of the Janata Dal (United), a key ally of the BJP-led NDA, has thanked Congress general secretary Priyanka Gandhi and former AICC chief Rahul Gandhi for their support in opposing CAA (Citizenship Amendment Act) and NRC (National Register of Citizens).

Perceived as one of the closest associates of Bihar Chief Minister Nitish Kumar, who is also the party’s national president, PK (as Prashant is fondly called) also assured the two top Congress leaders that the contentious legislation would not be implemented in Bihar where JD (U) is ruling the State with the support of the BJP.

“I join my voice with all to thank #Congress leadership for their formal and unequivocal rejection of #CAA_NRC. Both @rahulgandhi and @priyankagandhi deserve special thanks for their efforts on this count….also would like to reassure to all – CAA/NRC won’t be implemented in Bihar,” tweeted PK on Sunday.

The development assumes significance as a day back, the Congress Working Committee (CWC) meeting, chaired by Sonia Gandhi, had strongly opposed CAA/NRC/NPR as it was aimed at “sinister design of the present regime to divide Indian people into religious lines.”

The latest tweet by PK is also being seen as a rebuff to the BJP, which again recently reiterated that “the BJP should project its own chief ministerial candidate during the 2020 Bihar Assembly elections.”

The JD (U) had taken umbrage over such provocative statements by BJP leaders and asked the saffron camp to rein in its ‘loudmouths’ as BJP chief Amit Shah had already made it clear that the next Assembly polls in Bihar would be fought under the leadership of Nitish.

Of late, PK has been quite vocal about his opposition to the Centre’s policies, particularly the contentious issues of NRC and CAA. Besides, he even dubbed senior BJP leader Sushil Modi as the man who became Bihar’s Deputy Chief Minister due to ‘circumstances’ as the BJP was decisively decimated during the 2015 Assembly elections.

Nitish never reprimanded PK for his jibe against Modi, thereby giving rise to speculations whether Bihar was again heading for a political churning ahead of Assembly polls slated for October this year.

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News Network
January 1,2020

Pune, Jan 1: Maharashtra Deputy Chief Minister Ajit Pawar and Vanchit Bahujan Aghadi president Prakash Ambedkar paid tributes at the 'Jay Stambh' near here on Wednesday on the 202nd anniversary of Koregaon Bhima battle.

Lakhs of people congregate every year at the 'Jay Stambh' (victory pillar) near Koregaon Bhima village to offer tributes on the anniversary of the battle, which was fought on January 1, 1818 between the British East India Company and the Peshwa faction of the Maratha Confederacy.

Violence broke out during the bicentenary celebrations of the Koregaon Bhima battle on January 1, 2018 in which one person was killed and several others were injured.

Police have made elaborate security arrangements to ensure no untoward incident takes place during the congregation at the victory pillar, an official said.

Talking to reporters after visiting the victory pillar, Pawar said he came to offer tributes on behalf of the people of Maharashtra.

"This pillar has history and every year lakhs of people come here. Some untoward incidents took place two years ago, but the government is taking utmost care and elaborate police bandobast has been made here to ensure that no untoward incident takes place," he said.

Pawar also urged people to visit the war memorial in a peaceful manner.

"I appeal to people to come here and offer their tributes, but maintain peace and do not believe in rumours," the NCP leader said.

Prakash Ambedkar also offered his tributes at the victory pillar.

Pune Police last week issued notices to several people, including right-wing leaders Milind Ekbote and Sambhaji Bhide, and members of Kabir Kala Manch, barring them from entering the district for four days from December 29.

The notices, as part of preventive action, were issued to all those against whom cases were registered in connection with the violence two years ago.

Ekbote was arrested in March 2018 for allegedly instigating and orchestrating the violence around Koregaon Bhima.

Bhide was also booked and named in the FIR, but never arrested.

The police attributed the violence to the Elgar Parishad conclave held here on December 31, 2017, where provocative speeches were allegedly made.

They are also probing the alleged "Maoist link" of some activists to the Elgar Parishad conclave.

Several Dalit groups observe the anniversary of the Koregaon Bhima battle, in which the British defeated the Peshwas of Maharashtra.

The memorial, located at Perne village on Pune- Ahmednagar road, was constructed by the British in the memory of soldiers who died in the battle.

Dalit leaders commemorate the British victory as soldiers from the Mahar community were part of the East India Company's forces.

The Peshwas were Brahmins, and the victory is seen as a symbol of assertiveness by Dalits.

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