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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Agencies
May 27,2020

New Delhi, May 27: India’s fourth recession since Independence, first since liberalisation, and perhaps the worst to date is here, according to rating agency, Crisil.

CRISIL sees the Indian economy shrinking 5 per cent in fiscal 2021 (on-year), because of the Covid-19 pandemic. The first quarter will suffer a staggering 25 per cent contraction.

About 10 per cent of gross domestic product (GDP) in real terms could be permanently lost. "So going back to the growth rates seen before the pandemic is unlikely in the next three fiscals", Crisil said.

Crisil has revised its earlier forecast downwards. "Earlier, on April 28, we had slashed our prediction to 1.8 per cent growth from 3.5 per cent growth. Things have only gone downhill since", it said.

While we expect non-agricultural GDP to contract 6 per cent, agriculture could cushion the blow by growing at 2.5 per cent.

In the past 69 years, India has seen a recession only thrice as per available data in fiscals 1958, 1966 and 1980. The reason was the same each time a monsoon shock that hit agriculture, then a sizeable part of the economy.

"The recession staring at us today is different," it added. For one, agriculture could soften the blow this time by growing near its trend rate, assuming a normal monsoon. Two, the pandemic-induced lockdowns have affected most non-agriculture sectors. And three, the global disruption has upended whatever opportunities India had on the exports front.

Economic conditions have slid precipitously since the April-end forecast of 1.8 per cent GDP growth for fiscal 2021 (baseline), Crisil said.

On the lockdown extension, it said that the government has extended the lockdown four times to deal with the rising number of cases, curtailing economic activity severely (lockdown 4.0 is ending on May 31).

The first quarter of this fiscal will be the worst affected. June is unlikely to see major relaxations as the Covid-19 affliction curve is yet to flatten in India.

"Not only will the first quarter be a washout for the non-agricultural economy, services such as education, and travel and tourism among others, could continue to see a big hit in the quarters to come. Jobs and incomes will see extended losses as these sectors are large employers," Crisil said.

CRISIL also foresees economic activity in states with high Covid-19 cases to suffer prolonged disruption as restrictions could continue longer.

A rough estimate based on a sample of eight states, which contribute over half of India's GDP, shows that their 'red zones' (as per lockdown 3.0) contributed 42 per cent to the state GDP on average regardless of the share of such red zones.

On average, the orange zones contribute 46 per cent, while the green zones where activity is allowed to be close to normal contribute only 12 per cent to state GDP.

The economic costs are higher than earlier expectations, according to Crisil. The economic costs now beginning to show up in the hard numbers are far worse than initial expectations.

Industrial production for March fell by over 16%. The purchasing managers indices for the manufacturing and services sectors were at 27.4 and 5.4, respectively, in April, implying extraordinary contraction. That compares with 51.8 and 49.3, respectively, in March.

Exports contracted 60.3 per cent in April, and new telecom subscribers declined 35 per cent, while railway freight movement plunged 35 per cent on-year.

"Indeed, given one of the most stringent lockdowns in the world, April could well be the worst performing month for India this fiscal," it said.

Added to that is the economic package without enough muscle. The government recently announced a Rs 20.9 lakh crore economic relief package to support the economy. The package has some short-term measures to cushion the economy, but sets its sights majorly on reforms, most of which will have payoffs only over the medium term.

"We estimate the fiscal cost of this package at 1.2 per cent of GDP, which is lower than what we had assumed in our earlier estimate (when we foresaw a growth in GDP)," it said.

"We believe a catch-up to the pre-crisis trend level of GDP growth will not be possible in the next three fiscals despite policy support. Under the base case, we estimate a 10 per cent permanent loss to real GDP (from the decadal-trend level), assuming average growth of about 7 per cent between fiscals 2022 and 2024," Crisil said.

Interestingly, after the Global Financial Crisis (GFC), a sharp growth spurt helped catch up with the trend within two years. GDP grew 8.2 per cent on average in the two fiscals following the GFC. Massive fiscal spending, monetary easing and swift global recovery played a role in a V-shaped recovery.

To catch-up would require average GDP growth to surge to 11 per cent over the next three fiscals, something that has never happened before.

The research said that successive lockdowns have a non-linear and multiplicative effect on the economy a two-month lockdown will be more than twice as debilitating as a one-month imposition, as buffers keep eroding.

Partial relaxations continue to be a hindrance to supply chains, transportation and logistics. Hence, unless the entire supply chain is unlocked, the impact of improved economic activity will be subdued.

Therefore, despite the stringency of lockdown easing a tad in the third and the fourth phases, their negative impact on GDP is expected to massively outweigh the benefits from mild fiscal support and low crude oil prices, especially in the April-June quarter. "Consequently, we expect the current quarter's GDP to shrink 25 per cent on-year," it said.

Counting lockdown 4.0, Indians have had 68 days of confinement. S&P Global estimates that one month of lockdown shaves 3 per cent off annual GDP on average across Asia-Pacific.

Since India's lockdown has been the most stringent in Asia, the impact on economic growth will be correspondingly larger.

Google's Community Mobility Reports show a sharp fall in movement of people to places of recreation, retail shops, public transport and workplace travel. While data for May shows some improvement in India, mobility trends are much below the average or baseline, and lower compared with countries such as the US, South Korea, Brazil and Indonesia.

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News Network
July 9,2020

New Delhi, Jul 9: The Central Board of Secondary Education has strongly defended its decision to drop topics like democratic rights, citizenship, federalism, secularism etc in the name of reducing the syllabus for Classes 9 to 12 due to COVID-19 pandemic. 

The board has claimed that the dropped lessons "are either being covered by the rationalised syllabus or in the Alternative Academic Calendar of NCERT".

The CBSE said it had to come up with the clarification after realizing its decision was "interpreted differently".

"The rationalisation of syllabus up to 30 per cent has been undertaken by the Board for nearly 190 subjects of class 9 to 12 for the academic session 2020-21 as a one-time measure only. The objective is to reduce the exam stress of students due to the prevailing health emergency situation and prevent learning gaps," it said.

While it has said that no questions can be asked from the reduced syllabus in the next board exams, the CBSE has also directed schools to follow alternative calendars prepared by the NCERT.

"Therefore each of the topics that have been wrongly mentioned in media as deleted have been covered under Alternative Academic Calendar of NCERT which is already in force for all the affiliated schools of the Board," it clarified.

On Wednesday, West Bengal CM Mamata Banerjee tweeted: "Shocked to know that the central Government has dropped topics like citizenship, federalism, secularism and partisan in the name of reducing CBSE course during the COVID crisis."

"We strongly object to this and appeal the HRD Ministry to ensure these vital lessons aren't curtailed at any cost," Banerjee added.

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News Network
June 18,2020

New Delhi, Jun 18: Prime Minister Narendra Modi on Thursday said he is "deeply grateful" for the overwhelming support shown by the global community for India''s membership of the UN Security Council.

India will work with all member countries to promote global peace, security, resilience and equity, he said.

India garnered 184 votes out of the 192 ballots cast in the General Assembly to win the election for the non-permanent seat in the powerful Security Council.

India''s two year term will begin on January 1, 2021.

This is the eighth time that India will sit at the UN high-table, which comprises five permanent members and 10 non-permanent members.

"Deeply grateful for the overwhelming support shown by the global community for India''s membership of the UN Security Council," the prime minister wrote on Twitter.

India will work with all member countries to promote global peace, security, resilience and equity, he said.

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