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
February 2,2020

Feb 2: Prime Minister Narendra Modi’s second budget in seven months disappointed investors who were hoping for big-bang stimulus to revive growth in Asia’s third-largest economy.

The fiscal plan -- delivered by Finance Minister Nirmala Sitharaman on Saturday -- proposed tax cuts for individuals and wider deficit targets but failed to provide specific steps to fix a struggling financial sector, improve infrastructure and create jobs. Stocks slumped as a proposal to scrap the dividend distribution tax for companies failed to impress investors.

"Far from being a game changer, the budget provides little in terms of short-term growth stimulus,” said Priyanka Kishore, head of India and South East Asia economics at Oxford Economics Ltd. in Singapore. “While income tax cuts will provide some relief on the consumption front, the multiplier effect is low and the overall stance of the budget is not expansionary."

India has gone from being the world’s fastest-growing major economy three years ago, expanding at 8%, to posting its weakest performance in more than a decade this fiscal year, estimated at 5%.

While the government has taken a number of steps in recent months to spur growth, they’ve fallen short of spurring demand in the consumption-driven economy. Saturday’s budget just added to the glum sentiment.

Okay Budget

“It’s an okay budget but not firing on all cylinders that the market was hoping for,” said Andrew Holland, chief executive officer at Avendus Capital Alternate Strategies in Mumbai.

The government had limited scope for a large stimulus given a huge shortfall in revenues in the current year. The slippage induced Sitharaman to invoke a never-used provision in fiscal laws, allowing the government to exceed the budget gap by 0.5 percentage points. The result: the deficit for the year ending March was widened to 3.8% of gross domestic product from a planned 3.3%.

On Friday, India’s chief economic adviser Krishnamurthy Subramanian said reviving economic growth was an “urgent priority” and deficit goals could be relaxed to achieve that. The adviser’s Economic Survey estimated growth will rebound to 6%-6.5% in the year starting April.

The fiscal gap will narrow to 3.5% next year, as the government budgeted for gross market borrowing to rise marginally to 7.8 trillion rupees from 7.1 trillion rupees in the current year. A plan to earn 2.1 trillion rupees by selling state-owned assets in the year starting April will also help plug the deficit.

Total spending in the coming fiscal year will increase to 30.4 trillion rupees, representing a 13% increase from the current year’s budget, according to latest data.

Key highlights from the budget:

* Tax on annual income up to 1.25 million rupees pared, with riders

* Dividend distribution tax to be levied on investors, instead of companies

* Farm sector budget raised 28%, transport infrastructure gets 7% more

* Spending on education raised 5%

* Fertilizer subsidy cut 10%

Analysts said the muted spending plan to keep the deficit in check will lead to more downside risks to growth in the coming months.

“It is very doubtful that the increase in expenditure will push demand much,” Chakravarthy Rangarajan, former governor at the Reserve Bank of India told BloombergQuint, adding that achieving next year’s budget deficit goal of 3.5% of GDP was doubtful.

With the government sticking to a conservative fiscal path, the focus will now turn to central bank, which is set to review monetary policy on Feb. 6. Given inflation has surged to a five-year high of 7.35%, the RBI is unlikely to lower interest rates.

What Bloomberg’s Economists Say:

The burden of recovery now falls solely on the Reserve Bank of India. With inflation breaching RBI’s target at present, any rate cuts by the central bank are likely to be delayed and contingent upon inflation falling below the upper end of its 2%-6% target range.

-- Abhishek Gupta, India economist

Governor Shaktikanta Das may instead focus on unconventional policy tools such as the Federal Reserve-style Operation Twist -- buying long-end debt while selling short-tenor bonds -- to keep borrowing costs down.

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News Network
April 28,2020

Los Angeles, Apr 28: People who experience loss of smell as one of the COVID-19 symptoms are likely to have a mild to moderate clinical course of the disease, according to a study which may help health care providers determine which patients require hospitalisation.

The findings, published in the journal International Forum of Allergy & Rhinology, follows an earlier study that validated the loss of smell and taste as indicators of infection with the novel coronavirus, SARS-CoV-2.

According to the scientists from the University of California (UC) San Diego Health in the US, patients who reported loss of smell were 10 times less likely to be hospitalised for COVID-19 compared to those without the symptom.

"One of the immediate challenges for health care providers is to determine how to best treat persons infected by the novel coronavirus," said Carol Yan, first author of the current study and rhinologist from the UC San Diego Health.

"If they display no or mild symptoms, can they return home to self-quarantine or will they likely require hospitalisation? These are crucial questions for hospitals trying to efficiently and effectively allocate finite medical resources," Yan said.

The findings, according to the researchers, suggest that loss of smell may be predictive of a milder clinical course of COVID-19.

"What's notable in the new findings is that it appears that loss of smell may be a predictor that a SARS-CoV-2 infection will not be as severe, and less likely to require hospitalisation," Yan said.

"If an infected person loses that sense, it seems more likely they will experience milder symptoms, barring other underlying risk factors," she added.

Risk factors for COVID-19 previously reported by other studies include age, and underlying medical conditions, such as chronic lung disease, serious heart conditions, diabetes, and obesity.

In the current study, the scientists made a retrospective analysis between March 3 and April 8 including 169 patients who tested positive for COVID-19 at UC San Diego Health.

They assessed olfactory and gustatory data for 128 of the 169 patients, 26 of whom required hospitalisation.

According to the researchers, patients who were hospitalised for COVID-19 treatment were significantly less likely to report anosmia or loss of smell -- 26.9 per cent compared to 66.7 per cent for COVID-19-infected persons treated as outpatients.

Similar percentages were found for loss of taste, known as dysgeusia, they said.

"Patients who reported loss of smell were 10 times less likely to be admitted for COVID-19 compared to those without loss of smell," said study co-author Adam S. DeConde.

"Moreover, anosmia was not associated with any other measures typically related to the decision to admit, suggesting that it's truly an independent factor and may serve as a marker for milder manifestations of Covid-19," DeConde said.

The researchers suspect that the findings hint at some of the physiological characteristics of the infection.

"The site and dosage of the initial viral burden, along with the effectiveness of the host immune response, are all potentially important variables in determining the spread of the virus within a person and, ultimately, the clinical course of the infection," DeConde said.

If the SARS-CoV-2 virus initially concentrates in the nose and upper airway, where it impacts olfactory function, that may result in an infection that is less severe and sudden in onset, decreasing the risk of overwhelming the host immune response, respiratory failure, and hospitalisation, the scientists added.

"This is a hypothesis, but it's also similar to the concept underlying live vaccinations," DeConde explained.

"At low dosage and at a distant site of inoculation, the host can generate an immune response without severe infection," he added.

Loss of smell, according to the study, might also indicate a robust immune response which has been localised to the nasal passages, limiting effects elsewhere in the body.

Citing the limitations of the study, the scientists said they relied upon self-reporting of anosmia from participants, which posed a greater chance of recall bias among patients once they had been diagnosed with COVID-19.

They added that patients with more severe respiratory disease requiring hospitalisation may not be as likely to recognise or recall the loss of smell.

So the researchers said more expansive studies are needed for validating the results.

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News Network
February 17,2020

New Delhi, Feb 17: Two alleged criminals were killed in an exchange of fire with the Special Cell of Delhi Police at Pul Pehlad Pur area in New Delhi on Monday morning, officials said.

The encounter took place around 5 am, they said.

Raja Qureshi and Ramesh Bahadur, who were injured during the encounter, were rushed to a nearby hospital, where they were declared brought dead by doctors, Deputy Commissioner of Police (Special Cell) P S Kushwah said.

According to police, the two men were involved in multiple cases of murder and robbery.

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