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 7,2020

Dubai/Washington, Jan 7: Iran's Supreme Leader Ayatollah Ali Khamenei wept in grief with hundreds of thousands of mourners thronging Tehran's streets on Monday for the funeral of military commander Qassem Soleimani, killed by a U.S. drone on U.S. President Donald Trump's orders.

The coffins of General Qassem Soleimani and Iraqi militia leader Abu Mahdi al-Muhandis, who also died in Friday's attack in Baghdad, were draped in their national flags and passed from hand to hand over the heads of mourners in central Tehran.

Responding to Trump's threats to hit 52 Iranian sites if Tehran retaliates for the drone strike, Iran's President Hassan Rouhani pointedly wrote on Twitter: "Never threaten the Iranian nation." And Soleimani's successor vowed to expel U.S. forces from the Middle East in revenge.

Khamenei, 80, led prayers at the funeral, pausing as his voice cracked with emotion. Soleimani, 62, was a national hero in Iran, even to many who do not consider themselves supporters of Iran's clerical rulers.

Aerial footage showed people, many clad in black, packing thoroughfares and side streets in the Iranian capital, chanting "Death to America!" - a show of national unity after anti-government protests in November in which many demonstrators were killed.

The crowd, which state media said numbered in the millions, recalled the masses of people that gathered in 1989 for the funeral of the Islamic Republic's founder, Ayatollah Ruhollah Khomeini. Soleimani, architect of Iran's drive to extend its influence across the Middle East, was widely seen as Iran's second most powerful figure behind Khamenei.

His killing of Soleimani has prompted concern around the world that a broader regional conflict could flare.

Trump on Saturday vowed to strike 52 Iranian targets, including cultural sites, if Iran retaliates with attacks on Americans or U.S. assets, and stood by his threat on Sunday, though American officials sought to downplay his reference to cultural targets. The 52 figure, Trump noted, matched the number of U.S. Embassy hostages held for 444 days after the 1979 Iranian Revolution.

Rouhani, regarded as a moderate, responded to Trump on Twitter.

"Those who refer to the number 52 should also remember the number 290. #IR655," Rouhani wrote, referring to the 1988 shooting down of an Iranian airline by a U.S. warship in which 290 were killed.

Trump also took to Twitter to reiterate the White House stance that "Iran will never have a nuclear weapon" but gave no other details.

'ACTIONS WILL BE TAKEN'

General Esmail Ghaani, Soleimani's successor as commander of the Quds Force, the elite unit of Iran's Revolutionary Guards charged with overseas operations, promised to "continue martyr Soleimani's cause as firmly as before with the help of God, and in return for his martyrdom we aim to rid the region of America."

"God the Almighty has promised to take martyr Soleimani's revenge," he told state television. "Certainly, actions will be taken."

Other political and military leaders have made similar, unspecific threats. Iran, which lies at the mouth of the key Gulf oil shipping route, has a range of proxy forces in the region through which it could act.

Iran's demand for U.S. forces to withdraw from the region gained traction on Sunday when Iraq's parliament passed a resolution calling for all foreign troops to leave the country.

Iraqi caretaker Prime Minister Abdel Abdul Mahdi told the U.S. ambassador to Baghdad on Monday that both nations needed to implement the resolution, the premier's office said in a statement. It did not give a timeline.

The United States has about 5,000 troops in Iraq.

Soleimani built a network of proxy militia that formed a crescent of influence - and a direct challenge to the United States and its regional allies led by Saudi Arabia - stretching from Lebanon through Syria and Iraq to Iran. Outside the crescent, Iran nurtured allied Palestinian and Yemeni groups.

He notably mobilised Shi'ite Muslim militia forces in Iraq that helped to crush ISIS, the Sunni militant group that had seized control of swathes of Syria and Iraq in 2014.

Washington, however, blames Soleimani for attacks on U.S. forces and their allies.

The funeral moves to Soleimani's southern home city of Kerman on Tuesday. Zeinab Soleimani, his daughter, told mourners in Tehran that the United States would face a "dark day" for her father's death, adding, "Crazy Trump, don't think that everything is over with my father's martyrdom."

NUCLEAR DEAL

Iran stoked tensions on Sunday by dropping all limitations on its uranium enrichment, another step back from commitments under a landmark deal with major powers in 2015 to curtail its nuclear programme that Trump abandoned in 2018.

In response, European signatories may launch a dispute resolution process against Iran this week that could lead to a renewal of the United Nations sanctions that were lifted as part of the deal, European diplomats said on Monday.

Diplomats said France, Britain and Germany could make a decision ahead of an EU foreign ministers' meeting on Friday that would assess whether there were any ways to salvage the deal.

After quitting the deal, the United States imposed new sanctions on Iran, saying it wanted to halt Iranian oil exports, the main source of government revenues. Iran's economy has been in freefall as the currency has plunged.

Trump adviser Kellyanne Conway said on Monday that he was still confident he could renegotiate a new nuclear agreement "if Iran wants to start behaving like a normal country."

Tehran has said Washington must return to the existing nuclear pact and lift sanctions before any talks can take place.

The United States advised American citizens in Israel and the Palestinian territories to be vigilant, citing the risk of rocket fire amid heightened tensions. As a U.S. ally against Iran, Israel is concerned about possible rocket attacks from Gaza, ruled by Iranian-backed Palestinian Islamists, or major Iran proxy Hezbollah in Lebanon.

Democratic critics of Trump have said the Republican president was reckless in authorising the strike, with some saying his threat to hit cultural sites amounted to a vow to commit war crimes. Trump also threatened sanctions against Iraq and said Baghdad would have to pay Washington for an air base in Iraq if U.S. troops were required to leave.

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News Network
July 9,2020

New Delhi, Jul 9: India reported the highest single-day spike of 24,879 new positive cases and 487 deaths in the last 24 hours, taking the total number of COVID-19 cases in the country to 7,67,296, according to the Union Ministry of Health and Family Welfare.

Out of the total number of cases, 2,69,789 are active, 4,76,378 have been cured/discharged/migrated and 21,129 have died.

Maharashtra remains the worst-affected state due to COVID-19 with as many as 2,23,724 cases, including 91,084 active, 1,23,192 cured/discharged and 9,448 deaths.

It is followed by Tamil Nadu (1,22,350) and Delhi (1,04,864).

Meanwhile, a total of 1,07,40,832 samples have been tested for COVID-19 till July 8. Of these, 2,67,061 samples were tested yesterday, stated Indian Council of Medical Research (ICMR).

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News Network
May 24,2020

New Delhi, May 24: New rules for domestic travel during the lockdown were released by the government today, including advising passengers to download the Aarogya Setu application on their mobile devices and asking states to ensure thermal screening at departure point of airports, railway stations and bus terminals. The guidelines were shared by Civil Aviation Minister Hardeep Singh Puri, who also shared new rules for international travel.

The minister had recently said that international flight operations may start by mid-June or end-July if the COVID-19 virus "behaves in a predictable manner".

"Prescribed clinical protocol will be followed in case any domestic or international traveller shows symptoms of COVID-19. States can also develop their own protocol for quarantine and isolation as per their own assessment," Mr Puri said.

The guidelines come a day before the resumption of air travel after nearly two-months hiatus following lockdown to prevent the spread of coronavirus.

The Indian Railways has also issued a list of 100 pairs of trains that it will operate from June 1, putting in operation popular trains such as Durontos, Sampark Krantis, Jan Shatabdis and Poorva Express.

Dos and Don'ts shall be provided along with tickets to travellers by agencies concerned, said the Health Ministry's guidelines for domestic travel (air/train/inter-state bus travel).

Latest guidelines on domestic & international travel have been issued by @MoHFW_INDIA.

I hope travellers strictly follow these self-regulatory norms & strengthen India's hands in this fight against COVID19. Remember, each one of us is a soldier against the pandemic.@MoCA_GoIpic.twitter.com/xVbTG1K44n

— Hardeep Singh Puri (@HardeepSPuri) May 24, 2020
Travellers shall give 14-day quarantine undertaking before boarding

The states and Union Territories shall ensure that all passengers undergo thermal screening at the point of departure and only asymptomatic passengers are allowed to board the flight, train or bus. Asymptomatic passengers, however, will be permitted to travel after they give an undertaking to self-monitor for 14 days, the ministry said.

Those having moderate or severe symptoms will be admitted to dedicated COVID health facilities and managed accordingly, the guidelines said.

Those having mild symptoms will be given the option of home isolation or isolated in the COVID Care Centre (both public and private facilities) as appropriate and tested as per ICMR protocol, they said.

"If positive, they will continue in COVID Care Centre and will be managed as per clinical protocol. If negative, the passenger may be allowed to go home, isolate himself/herself and self-monitor his/her health for further 7 days," the health ministry said.

In case, any symptoms develop they shall inform the district surveillance officer or the state or the national call centre (1075), it said.

Use of face covers, following respiratory hygine during travel

During boarding and travel, all passengers shall use face covers or masks and will also follow hand hygiene, respiratory hygiene and maintain environmental hygiene, the ministry said in its guidelines.

At airports, railway stations and bus terminals, required measures to ensure social distancing shall be taken, the guidelines said.

Airports, railway stations and bus terminals to be regularly sanitised

Airports, railway stations and bus terminals should be regularly sanitised or disinfected and the availability of soaps and sanitisers shall be ensured, the health ministry said.

The ministry said that states can also develop their own protocol with regards to quarantine and isolation as per their assessment.

Guidelines for International Travel

The guidelines for international travel include mandatory undertaking for quarrantine for 14 days. "Only for exceptional and compelling reasons such as cases of human distress, pregnancy, death in family, serious illness and parent(s) accompanied by children below 10 yrs, as assessed by the receiving states, home quarantine may be permitted for international travellers for 14 days," the Civil Aviation minister said.

Asymptomatic travelers will be allowed to board flight/ship

At the time of boarding the flight or ship, only asymptomatic travellers will be allowed to board after thermal screening, the health ministry said.. Passengers arriving through land borders will also have to undergo the same procedure, it said.

"Self-declaration form in duplicate shall be filled by the person in the flight/ship and a copy of the same will be given to Health and immigration officials present at the airport/seaport/landport. The form will be made available through the Aarogya Setu app," the new order said.

Passengers found to be symtomatic during screening shall be immediately isolated and taken to medical facility as per health protocol. "These passengers will be kept under institutional quarrantine for a minimum period of 7 days and should undergo necessary tests as per ICMR protocol," the guidelines said.

Sanitisation and disinfection must inside flights

Authorities must take adequate measures to such as environmental sanitation and disinfection at the airports as well as within the flights, the guideline said.Suitable announcement about COVID-19 including precautionary measures to be followed shall be made at airports/ports, it added.

While on board flight, ships, passengers and crew required precautions such as wearing of masks, environmental hygiene, respiratory hygiene, hand hygiene, the ministry said.

This morning, India registered the biggest-single day jump in the number of coronavirus cases as 6,767 new patients were reported in the last 24 hours. This is the third consecutive day that India has reported more than 6,000 COVID-19 cases with a record number of new patients each day. The county has officially logged 1,31,868 cases, 3,867 deaths linked to the highly infectious illness since the pandemic began. Of these, 147 patients died in the last 24 hours. The global number of novel coronavirus cases has passed 5.25 million with more than 339,000 deaths. Since the outbreak first emerged in China in December, 5,260,970 cases have been recorded across 196 countries and territories, with 339,758 deaths attributed to the virus.

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