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 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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Agencies
March 16,2020

While Google is still working on a coronavirus screening and tracking website, Microsoft Bing team has already launched a web portal for tracking COVID-19 infections worldwide.

The website, accessible at bing.com/covid, provides up-to-date infection statistics for each country.

The COVID-19 Tracker currently lists 168,835 as total confirmed cases, 84,558 active cases, 77,761 recovered cases and 6,516 deaths.

There are at least 3,244 confirmed cases of novel coronavirus in the US and at least 61 deaths.

"Lots of Bing folks worked (from home) this past week to create a mapping and authoritative news resource for COVID19 info," Michael Schechter, General Manager for Bing Growth and Distribution at Microsoft, was quoted as saying in a ZDNet report on Sunday.

An interactive map allows site visitors to click on the country to see the specific number of cases and related articles from a variety of publishers.

Data is being aggregated from sources like the World Health Organization (WHO), the US Centers for Disease Control and Prevention (CDC), and the European Centre for Disease Prevention and Control (ECDC).

Microsoft announced the website two days after US President Donald Trump said Google has begun working on COVID-19-related portal for US citizens.

Google's website is being built by Verily, a subsidiary of Alphabet focused on healthcare services.

"More than 1,700 engineers are currently working on the site", Trump said during a press briefing last week.

The tool will triage people who are concerned about their COVID-19 risk into testing sites based on guidance from public health officials and test availability.

Initially, there was some confusion on Google's coronavirus portal but the company later announced that it is "partnering with the US Government in developing a nationwide website that includes information about COVID-19 symptoms, risk, and testing information."

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Agencies
May 14,2020

Mumbai, May 14: The Shiv Sena on Thursday raised questions over the Centre's Rs 20 lakh crore stimulus package announced to revive the COVID-hit economy, and asked if India is not a "self-reliant" country at present.

An editorial in Sena mouthpiece 'Saamana' wondered how Rs 20 lakh crore will be raised, and opined that an environment needs to be created where industrialists, trade and business sectors are encouraged to invest.

On the path of new self-reliance, India cannot afford industrialists running away, and for that "political institutions like the ED and CBI need to be put in lockdown for some time," it said.

Prime Minister Narendra Modi on Tuesday announced new financial incentives on top of the previously announced packages for a combined stimulus of Rs 20 lakh crore, saying the COVID-19 crisis has provided India an opportunity to become self-reliant and emerge as the best in the world.

The Sena said the country is being told that the package will be beneficial for MSMEs (micro, small and medium enterprises), poor labourers, farmers and the tax-paying middle class.

"The package (as per the Centre) will reach 130 crore Indians and the country will become self-reliant. Does this mean India is not a self-reliant country at present?" the Marathi daily asked.

It is good that PPE kits and N95 masks are now being manufactured in India, it said.

"Any country progresses ahead while learning from crisis and through struggle. Before Independence, not even a needle was manufactured in India but in 60 years, India became self-reliant in science, technology, agro business, defence, manufacturing and atomic science," it said.

An institution like the Indian Council of Medical Research (ICMR), which is helping in the manufacturing of PPE kits, is part of the self-reliant India, it noted.

Wondering how Rs 20 lakh crore, as announced in the central package, will be raised, the Sena said an "environment needs to be created where industrialists, trade and business sectors will be encouraged to invest".

"India, on path of new self-reliance, cannot afford industrialists running away, and for that political institutions like the Enforcement Directorate (ED) and the Central Bureau of Investigation (CBI) need to be put in lockdown for some time," the paper said.

Despite announcing the 'lockdown-4' and the economic package, why its impact has not been reflected in the share market? it asked.

"Investors are in a dilemma. The prime minister and chief ministers must show them trust and support," it said.

"Earlier it was Pandit Nehru and now it is Modi. If (former prime minister) Rajiv Gandhi had not laid the foundation of a digital India, there wouldn't be video conference of PM, CMs and bureaucracy in times of coronavirus," the Uddhav Thackeray-led party said.

It agreed with Modi that coronavirus will stay for long, and lives need not revolve around it.

"We need to get back on our feet again," the Sena said.

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