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
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
February 17,2020

New Delhi, Feb 17: Indian officials denied entry to British lawmaker Debbie Abrahams on Monday after she landed at New Delhi's Indira Gandhi International Airport.

Debbie Abrahams, a Labour Party Member of Parliament who chairs a parliamentary group focused on the Kashmir, was unable to clear customs after her valid Indian visa was rejected, her aide, Harpreet Upal, told The Associated Press.

Abrahams and Upal arrived at the airport on an Emirates flight from Dubai at 9 am. Upal said the immigration officials did not cite any reason for denying Abrahams entry and revoking her visa, a copy of which, valid until October 2020, was shared with the AP. A spokesman for India's foreign ministry did not immediately comment.

Abrahams has been a member of Parliament since 2011 and was on a two-day personal trip to India, she said in a statement.

"I tried to establish why the visa had been revoked and if I could get a 'visa on arrival' but no one seemed to know," she said in the statement.

"Even the person who seemed to be in charge said he didn't know and was really sorry about what had happened. So now I am just waiting to be deported ... unless the Indian Government has a change of heart. I'm prepared to let the fact that I've been treated like a criminal go, and I hope they will let me visit my family and friends."

Abrahams has been an outspoken critic of the Indian government's move last August stripping Jammu and Kashmir of its semi-autonomy and bifurcating the state into two Union Territories.

Shortly after the changes to Kashmir's status were passed by Parliament, Abrahams wrote a letter to India's High Commissioner to the UK, saying the action "betrays the trust of the people" of Kashmir.

India took more than 20 foreign diplomats on a visit to Kashmir last week, the second such trips in six months.

Access to the region remains tight, with no foreign journalists allowed.

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Agencies
June 29,2020

Tehran, Jun 29: Iran has issued an arrest warrant and asked Interpol for help in detaining President Donald Trump and dozens of others it believes carried out the drone strike that killed a top Iranian general in Baghdad, a local prosecutor reportedly said Monday.

While Trump faces no danger of arrest, the charges underscore the heightened tensions between Iran and the United States since Trump unilaterally withdrew America from Tehran’s nuclear deal with world powers.

Tehran prosecutor Ali Alqasimehr said Trump and more than 30 others whom Iran accuses of involvement in the Jan. 3 strike that killed Gen. Qassem Soleimani in Baghdad face “murder and terrorism charges,” the semiofficial ISNA news agency reported.

Alqasimehr did not identify anyone else sought other than Trump, but stressed that Iran would continue to pursue his prosecution even after his presidency ends.

Interpol, based in Lyon, France, did not immediately respond to a request for comment.

Alqasimehr also was quoted as saying that Iran requested a “red notice” be put out for Trump and the others, which represents the highest level arrest request issued by Interpol. Local authorities end up making the arrests on behalf of the country that request it. The notices cannot force countries to arrest or extradite suspects, but can put government leaders on the spot and limit suspects’ travel.

After receiving a request, Interpol meets by committee and discusses whether or not to share the information with its member states. Interpol has no requirement for making any of the notices public, though some do get published on its website.

It is unlikely Interpol would grant Iran’s request as its guideline for notices forbids it from “undertaking any intervention or activities of a political” nature.

The U.S. killed Soleimani, who oversaw the Revolutionary Guard’s expeditionary Quds Force, and others in the January strike near Baghdad International Airport. It came after months of incidents raising tensions between the two countries and ultimately saw Iran retaliate with a ballistic missile strike targeting American troops in Iraq.

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