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
June 17,2020

New Delhi, 17: Tensions on the Indo-China border have spiked to the highest since 1962 after over 20 troops, including an Indian commanding officer, were killed in the face-off in Galwan valley that has seen a six-week long standoff underway with the Peoples Liberation Army.

The Army said that the soldiers – including the Commanding Officer of 16 Bihar regiment in charge of the area – died while a `de-escalation process’ was underway. Sources said that this death toll could rise up as some soldiers are currently not accounted for after PLA troops attacked with spiked sticks and stones in the Galwan valley.

Chinese side also has casualties but the number is still not known. The Indian death toll is perhaps the worst single day loss in decades and has come at a time when thousands of troops are forward deployed in Eastern Ladakh.

ET was the first to report on May 12 about a massive troop build up in the Galwan valley, which is an old flashpoint that had seen action in the 1962 war as well.

There have been reports of casualties on the Chinese side in the clash but numbers are currently not available. Worryingly, information from the ground suggests that several Indian soldiers, including four officers, are missing and could have been taken captive by a vastly larger Chinese force. Their status is still not known.

“During the de-escalation process underway in the Galwan Valley, a violent face-off took place yesterday night with casualties. The loss of lives on the Indian side includes an officer and two soldiers. Senior military officials of the two sides are currently meeting at the venue to defuse the situation,” an Indian Army statement reads.

The Ministry of External Affairs said that the clash occurred when the Chinese side violated the LAC. “On the late-evening and night of 15th June, 2020 a violent face-off happened as a result of an attempt by the Chinese side to unilaterally change the status quo there. Both sides suffered casualties that could have been avoided had the agreement at the higher level been scrupulously followed by the Chinese side,” a statement reads.

The loss of the Commanding Officer is especially devastating and he had been directly involved in de-escalation talks with the Chinese side, including one hours before the clash took place. Sources said that the talks on Monday morning had led to an agreement for Chinese forces to withdraw from Indian territory as part of the disengagement.

According to one version, the CO had gone to the standoff point with a party of 50 men to check if the Chinese had retreated as promised. As the Indian side proceeded to demolish and burn illegal Chinese structures on its side of the LAC, including an observation post constructed on the South bank of the river, a fresh stand off took place as a large force of Chinese troops returned back.

Sources said that a Chinese force in excess of 250 quickly assembled near Patrol Point 14 and were physically stopped by Indian soldiers from entering Indian territory. Soldiers from both sides did not use firearms but the Chinese soldiers carried spiked sticks to attack.

Given the terrain of the region, a part of the standoff and clash took place in the middle of the Galwan river that is currently flowing at full spate, leading to high casualties as injured soldiers got swept away. Indian soldiers have to cross the Galwan river at atleast five points to reach PP 14, which marks the LAC.

Chinese media reports on Tuesday quoted the spokesperson from its Western Theatre Command as laying claim over the Galwan valley region and blaming the Indian side for the clash. Reports quoted Col Zhang Shuili as saying that India has violated the consensus made during Army commander level talks.

As reported, Galwan river area has a painful history with China, with Peoples Liberation Army (PLA) soldiers surrounding a freshly set up Indian Army post in July 1962, in what would be one of the early triggers to the Sino-Indian war. At an Army post that was overrun at Galwan, 33 Indian soldiers were killed and several dozen taken captive in 1962.

In the past, the Doklam crisis in 2017 saw tensions building up along the Pangong Tso lake as well with soldiers engaging in a fight with sticks and stones. However, the Eastern Ladakh standoff is of a much more serious nature, with over 6000 Chinese troops lined up with tanks and artillery, faced off with a larger Indian forces. Troop build up has also been reported across the borders in Himachal Pradesh, Uttarakhand, Sikkim and Arunachal.

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News Network
May 7,2020

Dubai, May 7: As India begins the world’s largest evacuation mission by repatriating its overseas citizens stranded due to COVID-19, as many as 354 of them from the UAE will fly into their home country in the first two flights to Kerala today.

An Air India Express flight, which is scheduled to take off from Abu Dhabi to Kochi at 4.15 pm is the first flight, which will be followed by a Dubai-Kozhikode flight of the same airline at 5.10pm. The Indian missions in the UAE finalised the list of passengers, who were chosen based on the compelling reasons they submitted while registering their names.

Selection criteria

These include pregnant women and their accompanying family members in some instances, people with medical emergencies, workers and housemaids in distress, families with cancelled visas, bereaved family members who couldn’t attend funerals back home, a few students and stranded visitors and tourists including two brothers who got stranded in Dubai International Airport for 50 days, the missions said.

Short-listing the first passengers from among a database of more than 200,000 applicants, who include around 6,500 pregnant women, has been a mammoth task which posed several challenges for the missions, Neeraj Agrawal, Consul Press, Information and Culture at the Indian Consulate in Dubai told Gulf News.

He said the consulate set up an operations room in a tie-up with community volunteers from Kerala Muslim Cultural Centre, Indian Association Ajman, AKCAF Task Force, the BAPS Mandir, Indian People’s Forum, and Tamil Ladies’ Sangam.

 “We are trying to accommodate as many deserving people as possible. We expect the understanding of the people. It has been very difficult to sort out everyone’s urgency.”

“We cannot do a lottery system in this and we had to make sub- categories to ensure there is a mix of people with different types of urgencies.”

“Though we want to give priority to pregnant women, it is practically not possible and not good for the health and safety of the applicants to allot a lot of them on the same flight.”

He said 11 pregnant women have been issued tickets on the Dubai-Kozhikode flight.

“That is the threshold we can allow on a flight.”

Volunteer support

The consul appreciated the support of the volunteers in finalising the flight manifest.

“But our response ratio was very less. Many people whose names came up on top of the list were not willing to go on the first flights.”

Due to various constraints like this and sometimes the details of accompanying persons not readily being available, he said the mission was not able to quickly reach out to who might be really in need.

“However, we have given due consideration to people who got in touch with us with their emergency needs. At the time of issuing tickets, we had about 20 such cases.”

He said the Consul General of India in Dubai Vipul led the entire operation and Pankaj Bodkhe, consul, education, was in charge of the Dubai flight.

A big challenge

“It has been a big challenge. Our only concern is that despite our best efforts, sometimes people with more compelling reasons might have got left out on the first flights because of the volume of people who have reached out to us.”

Since there is a chance that some passengers with tickets might not be allowed to fly if they fail the medical screening including blood tests to check antibodies for COVID-19, he said some applicants in the waiting list have been asked to be on standby at the airport.

People with emergencies wishing to fly to other destinations also could not be included, he pointed out.

“We had to ask them to wait. We are unable to send them to other destinations. We can see their desperation. We feel sorry and desperate.”

He said the government is trying to add more flights to un-chartered destinations and a new flight from Dubai to Kannur has been added on May 12.

Passengers of today’s flights have been urged to reach the airport four to five hours prior to departure to facilitate the medical screening.

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News Network
January 17,2020

Bengaluru, Jan 17: India’s latest communication satellite GSAT-30 was successfully launched from the Spaceport in French Guiana during the early hours on Friday.

In a press release, ISRO, has stated that the launch vehicle 'Ariane-5 VA-251' was blasted off from Kourou Launch Base, French Ginana at 0230 hours, carrying India’s GSA-30 and EUTELSAT KONNECT for Eutelasat, as per schedule.

The Ariane 5 upper stage in an elliptical Geosynchronous Transfer Orbit.

With a lift-off mass of 3,357 kg, GSAT-30 will provide continuity to operational services on some of the in-orbit satellites.

GSAT-30 derives its heritage from ISRO’s earlier INSAT/GSAT satellite series and will replace INSAT-4A in orbit.

“GSAT-30 has a unique configuration of providing flexible frequency segments and flexible coverage. The satellite will provide communication services to Indian mainland and islands through Ku-band and wide coverage covering Gulf countries, a large number of Asian countries and Australia through C-band," ISRO Chairman Dr K Sivan said.

Dr Sivan also said that “GSAT-30 will provide DTH Television Services, connectivity to VSATs for ATM, Stock-exchange, Television uplinking and teleport Services, Digital Satellite News Gathering (DSNG) and e-governance applications. The satellite will also be used for bulk data transfer for a host of emerging telecommunication applications.”

ISRO’s Master Control Facility (MCF) at Hassan in Karnataka took over the command and control of GSAT-30 immediately after its separation from the launch vehicle. Preliminary health checks of the satellite revealed its normal health.

In the days ahead, orbit-raising maneuvers will be performed to place the satellite in Geostationary Orbit (36,000 km above the equator) by using its onboard propulsion system.

During the final stages of its orbit raising operations, the two solar arrays and the antenna reflectors of GSAT-30 will be deployed. Following this, the satellite will be put in its final orbital configuration.

The satellite will be operational after the successful completion of all in-orbit tests.

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