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Gravitational waves detected for first time from newly born Blackhole: Study
These calculations matched earlier measurements of the black hole''s mass and spin. — Thinkstock

Gravitational waves detected for first time from newly born Blackhole: Study

13 Sep 2019 | 1:34 PM

BOSTON: Researchers have, for the first time, detected the gravitational waves from a newly born blackhole, and found that the ringing pattern of the waves predicts the cosmic body's mass and spin, providing more evidence for Einstein's General Theory of Relativity.

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BOSTON

Researchers have, for the first time, detected the gravitational waves from a newly born blackhole, and found that the ringing pattern of the waves predicts the cosmic body's mass and spin, providing more evidence for Einstein's General Theory of Relativity.

The study, published in the journal Physical Review Letters, increases the possibility that black holes exhibit only three observable properties—mass, spin, and electric charge.

All other properties, the study noted, could be swallowed up by the black hole itself, and are unobservable.

Einstein's General Theory of Relativity predicted that a black hole of a given mass and spin can only produce tones of a certain pitch and decay.

The team consisting of researchers from the Massachusetts Institute of Technology (MIT) in the US, that calculated the mass and spin that the black hole should have using physicist Albert Einstein's General Theory of Relativity, given its ringing pattern.

These calculations, according to the study, matched earlier measurements of the black hole's mass and spin.

"We all expect general relativity to be correct, but this is the first time we have confirmed it in this way," said the study's lead author, Maximiliano Isi.

He added that this was the first experimental measurement directly testing the theory.

In an earlier discovery of gravitational waves from two spiralling black holes collapsing into one, scientists had determined that the peak of the signal from the waves was linked to the very moment when the two bodies collided.

While there were gravitational waves produced by the black hole newly formed from the collision, its signature ringing was thought to be too feeble to decipher against that of the initial collision.

Isi and his team found a way to extract the black hole's reverberation from the moments immediately after the signal's peak, as they had found that the signal contained "overtones"—a family of loud, short-lived tones.

The researchers discovered that they could successfully isolate a ringing pattern exclusive to a newly formed black hole by applying their knowledge of the overtones.

By concentrating on the last few milliseconds of the signal, immediately following the chirp's peak, the researchers were able to observe the newly formed black hole's ringing.

"We detect an overall gravitational wave signal that's made up of multiple frequencies, which fade away at different rates, like the different pitches that make up a sound," Isi says.

"Each frequency or tone corresponds to a vibrational frequency of the new black hole."  

The team used the equations of General Theory of Relativity to calculate the newly formed black hole's mass and spin using the detected information on its pitch and decay.

Their calculations matched with calculations of the black hole's mass and spin which were made previously. — PTI 

Newly spotted comet may be interstellar visitor

Newly spotted comet may be interstellar visitor

13 Sep 2019 | 1:33 PM

WASHINGTON: A newly discovered comet could only be the second intersteller object scientists have found after 'Oumuamua’.

Exposure to certain smells may make you feel slimmer: Study

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12 Sep 2019 | 5:15 PM

LONDON: Exposure to certain smells and sounds may make us feel slimmer or more corpulent, claims a study which found that the image we have of our own body changes depending on the stimuli we encounter.

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12 Sep 2019 | 2:58 PM

WASHINGTON: Astronauts onboard the International Space Station (ISS) have for the first time mixed cement in microgravity, an advance that may help protect humans in space from radiation and extreme temperatures in the future, NASA said.

'Water found for first time on potentially habitable exoplanet'

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12 Sep 2019 | 2:59 PM

LONDON: Astronomers have for the first time discovered water in the atmosphere of an exoplanet with Earth-like temperatures that could support life as we know it.

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11 Sep 2019 | 7:07 PM

SAN FRANCISCO: A security flaw makes it extremely easy for anybody to view posts of private accounts on Facebook-owned Instagram.

Facebook tightens policies to prevent suicide, self-harm

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11 Sep 2019 | 1:28 PM

SAN FRANCISCO: On World Suicide Prevention Day, Facebook is tightening its policies around self-harm, suicide and eating disorder and has announced its plan to hire a health and well-being expert to join its safety policy team.

Buy iPhone 11 for Rs 64,900 in India on Sept 27

Buy iPhone 11 for Rs 64,900 in India on Sept 27

11 Sep 2019 | 10:41 AM

CUPERTINO (CALIFORNIA): Apple has announced India pricing of newly-launched iPhones - available in the country from September 27 - and the starting iPhone 11 model (64GB) with dual camera rear setup will cost you Rs 64,900.

Apple unveils 3 iPhone 11 models, starts from $699

Apple unveils 3 iPhone 11 models, starts from $699

11 Sep 2019 | 6:45 AM

CUPERTINO (CALIFORNIA):Packing some interesting top-of-the-line features including a long-lasting battery, Apple on Tuesday launched 3 iPhone 11 models, two of them with triple rear camera setup, housing stunning specifications to make you a near-perfect photographer.

Period tracking apps found sharing sensitive user data with Facebook

Period tracking apps found sharing sensitive user data with Facebook

10 Sep 2019 | 1:15 PM

SAN FRANCISCO: From personal information to contraception use, period tracking apps such as MIA Fem and Maya have been found sharing sensitive data with Facebook.

Blood test can predict gut microbes diversity

Blood test can predict gut microbes diversity

08 Sep 2019 | 3:33 PM

WASHINGTON: Scientists at the Institute for Systems Biology (ISB) in Seattle, USA, have developed a way to predict the diversity of microbes in an individual's gut by examining certain chemicals in the blood.

New method can offer unique insights into composition of  cells, tissues

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07 Sep 2019 | 6:32 PM

LONDON: A new method for understanding the chemical composition of cells and tissues has been developed, which can help better understand disease and inflammation processes, a study says.

Google will stop running ads for ‘unproved medical techniques’

Google will stop running ads for ‘unproved medical techniques’

07 Sep 2019 | 4:54 PM

SAN FRANCISCO: Under a new health care and medicines policy, Google has announced to ban online ads for 'unproven or experimental medical techniques,' such as most stem cell therapy, cellular (non-stem) therapy and gene therapy.

Climate crisis is changing grasslands across world: Study

Climate crisis is changing grasslands across world: Study

07 Sep 2019 | 4:01 PM

WASHINGTON: Grasslands across the world are transforming due to the climate crisis factors such as rising carbon dioxide levels, hotter temperatures, extra nutrient pollution, or drought, a study says.

26-foot-long dinosaur roamed the earth 72 million years ago, ‘nearly complete’ skeleton found

26-foot-long dinosaur roamed the earth 72 million years ago, ‘nearly complete’ skeleton found

07 Sep 2019 | 5:26 PM

TOKYO: Japanese scientists have identified a new species of dinosaur from a nearly complete skeleton that was the largest ever discovered in the country, measuring eight metres (26 feet) long.

How embryo develops at molecular level decoded

How embryo develops at molecular level decoded

06 Sep 2019 | 4:49 PM

WASHINGTON: Researchers in the US have created the first detailed map of the changes at the molecular level in cells that lead to embryonic development.

Sex, height may influence how you see phones: Study

Sex, height may influence how you see phones: Study

06 Sep 2019 | 4:04 PM

NEW YORK: Sex and height appear to influence how people flex their neck when viewing handheld devices, according to a new study.

Views on casual sex may put your marriage at risk: Report

Views on casual sex may put your marriage at risk: Report

06 Sep 2019 | 1:30 PM

NEW YORK: An individual's premarital views about uncommitted sex, such as one-night stands or casual sex, may make it more difficult to remain blissfully married, suggests a new study.

Video-based 'threat appeals' may lead to less texting while driving: Study

Video-based 'threat appeals' may lead to less texting while driving: Study

06 Sep 2019 | 12:20 PM

WASHINGTON: Video-based "threat appeals" may help reduce impulsive decision-making associated with texting while driving, and could prove to be a good strategy to cut motor vehicle crashes caused by distracted driving, according to a study.

Most Indian viewers consume online content during office hours

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05 Sep 2019 | 7:39 PM

MUMBAI: With the online content on mobile phones increasing, most Indian viewers consume the content during the traditional office hours of 10 am-6 pm, a recent survey said.

Our ability to tell colours apart may not depend on language: Study

Our ability to tell colours apart may not depend on language: Study

05 Sep 2019 | 5:00 PM

LONDON: The human ability to categorise colours may be independent of language, according to a case study on a 54-year-old French-Portuguese man who specifically lost his ability to correctly name colours after suffering a stroke.

400 million Facebook users' phone numbers exposed in privacy lapse: Reports

400 million Facebook users' phone numbers exposed in privacy lapse: Reports

05 Sep 2019 | 4:05 PM

WASHINGTON: Phone numbers linked to more than 400 million Facebook accounts were listed online in the latest privacy lapse for the social media giant, US media reported on Wednesday.

Drinking coffee linked to lower risk of gallstones: Study

Drinking coffee linked to lower risk of gallstones: Study

05 Sep 2019 | 3:02 PM

LONDON: Among 104,493 individuals, those who drank more than six cups of coffee per day had a 23 per cent lower risk of developing symptomatic gallstones.

Teens who do not date have low depression

Teens who do not date have low depression

05 Sep 2019 | 12:55 PM

NEW YORK: Researchers have found that teenagers who were not in a romantic relationship have good social skills, low depression and fared better than those who dated.

Truecaller crosses 500mn downloads, 150mn daily active users

Truecaller crosses 500mn downloads, 150mn daily active users

04 Sep 2019 | 2:06 PM

STOCKHOLM: Swedish caller identification app Truecaller on Wednesday announced it has crossed the 500 million mark in terms of downloads and now has 150 million daily active users globally.

Twitter CEO hack highlights dangers of ‘SIM swap’ fraud

Twitter CEO hack highlights dangers of ‘SIM swap’ fraud

04 Sep 2019 | 11:43 AM

WASHINGTON: Even with considerable security precautions in place, Twitter chief executive Jack Dorsey became the victim of an embarrassing compromise when attackers took control of his account on the platform by hijacking his phone number.

Facebook rolls out face recognition, kills tagging option

Facebook rolls out face recognition, kills tagging option

04 Sep 2019 | 10:45 AM

SAN FRANCISCO: In a much-needed relief for 2.41 billion users, Facebook is rolling out Face recognition feature to all which will replace the earlier "Tag Suggestions" settings that notified you if someone uploaded a photo and automatically tagged you in it.

Selective breeding for traits altered dogs' brains: Study

Selective breeding for traits altered dogs' brains: Study

03 Sep 2019 | 1:38 PM

BOSTON: Humans have systematically altered the brains of dogs through selective breeding for favoured behavioural traits over hundreds of years, according to a study.

'Big jump' in women giving TED talks: Study

'Big jump' in women giving TED talks: Study

03 Sep 2019 | 12:33 PM

BERLIN: Women gave more than half of TED talks—influential speeches from experts on a range of issues—in the first half of 2017, up from less than one-third in 2006, according to a study.

iPhone bug also accessed WhatsApp, Telegram chats: Google

iPhone bug also accessed WhatsApp, Telegram chats: Google

03 Sep 2019 | 11:05 AM

SAN FRANCISCO: Google researchers have identified a vulnerability that accessed all the database files on the victim's iPhone used by end-to-end encryption apps like WhatsApp, Telegram and iMessage.

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