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 1,2020

Mumbai, Jun 1: Singer-composer Wajid Khan of music director duo Sajid-Wajid, popular for their work on superstar Salman Khan's films such as "Wanted", "Dabangg" and "Ek Tha Tiger", died in early hours of Monday in a city hospital due to complications arising from a kidney infection. He was 42.

Music composer Salim Merchant, who confirmed the news of Wajid's death, said the composer was hospitalised few days ago at Surana Hospital, Chembur where his condition deteriorated.

"He had multiple issues. He had a kidney issue and had a transplant a while ago. But recently he got to know about kidney infection... He was on the ventilator for the last four days, after his situation started getting worse. Kidney infection was the beginning and then he got critical," Salim told PTI.

The music composer duo made their Bollywood debut with Salman's 1998 movie "Pyaar Kiya Toh Darna Kya" and went on to work on actor's various films including "Garv", "Tere Naam", "Tumko Na Bhool Payenge", "Partner" and the popular "Dabangg" franchise.

Wajid also did playback for Salman in chartbusters like "Mera He Jalwa", "Fevicol Se" and for Akshay Kumar in "Chinta Ta Chita Chita" from the film "Rowdy Rathore", among others. He recently co-composed Salman's songs "Pyaar Karona" and "Bhai Bhai", which the actor released on his YouTube channel.

Wajid along with his brother Sajid served as mentor on singing reality shows "Sa Re Ga Ma Pa 2012" and "Sa Re Ga Ma Pa Singing Superstar".

The composer duo also scored IPL 4 theme song, "Dhoom Dhoom Dhoom Dhadaka", which was sung by Wajid.

Soon after the news of the composer's demise broke, many from the film fraternity took to Twitter to pay tributes.

Actor Priyanka Chopra said she will always remember Wajid's smile.

"The one thing I will always remember is Wajid bhai's laugh. Always smiling. Gone too soon. My condolences to his family and everyone grieving. Rest in peace my friend. You are in my thoughts and prayers," she posted on Twitter.

Actor Parineeti Chopra said Wajid was one of the "nicest" men in the industry.

"Always singing. All heart. Always positive. You will truly be missed Wajid bhai," she tweeted.

Actor Varun Dhawan shared a picture of his filmmaker-father David Dhawan with Wajid and remembered the musician as one of the most positive people in Bollywood.

"Shocked hearing this news @wajidkhan7 bhai was extremely close to me and my family. He was one of the most positive people to be around. We will miss you Wajid bhai thank you for the music," he wrote.

Music composer-singer Vishal Dadlani said he was "heartbroken" after hearing the news.

"Both @SajidMusicKhan and @wajidkhan7 have been close & true friends. The kind who might see the light on and show up at our studio in the middle of the night just to meet and talk and share a laugh. Can't believe Wajid and I will never speak again," he wrote.

Singer-composer Shankar Mahadevan said he was still unable to come to terms with the news of Wajid's demise.

"Shocking ! Good bye dear brother.. love you .. till we meet on the other side ! Prayers for your peaceful journey Wajid bhai," he tweeted.

Singer Javed Ali posted, "Feeling Deeply Saddened after hearing shocking news of the sudden demise of Wajid Khan. May his Soul Rest in Peace. My heartfelt condolences to his family. May Allah give strength to the family."

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News Network
January 27,2020

Mumbai, Jan 27: The country's largest car maker Maruti Suzuki India (MSI) on Monday said it has increased prices of select models by up to Rs 10,000 with immediate effect to offset the impact of rising input costs.

The price change varies across models and ranges up to 4.7 per cent (ex-showroom Delhi) and are effective from January, 27 2020, MSI said in a statement.

The price of entry level model Alto range has gone up in the range of Rs 9,000-6,000, S-Presso between Rs 1,500 to 8,000, WagonR between Rs 1,500 and Rs 4,000.

The company has also increased the price of its multi purpose vehicle Ertiga between Rs 4,000-10,000, Baleno by Rs 3,000 to 8,000 and XL6 by up to Rs 5,000 (all prices ex-showroom Delhi).

Currently, the company sells a range of vehicles starting from entry-level small car Alto to premium multi purpose vehicle XL6 with price ranging from Rs 2.89 lakh to Rs 11.47 lakh (ex-showroom Delhi).

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Agencies
March 8,2020

Consumer watchdog Which? has claimed that more than one billion Android phones and tablets are vulnerable to hackers as they no longer supported by security updates.

According to the research report, the most at-risk phones are any that run Android 4 or older and those smartphones running Android 7.0 which can not be updated are also at risk.

Based on data from Google analysed by Which?, two in five android device users around the world are no longer receiving the important updates. Currently, those devices are unlikely to have issues, but the lack of security leaves them open to attack.

"It is very concerning that expensive Android devices have such a short shelf life before they lose security support, leaving millions of users at risk of serious consequences if they fall victim to hackers," Kate Bevan editor Which? said in a statement.

"Google and phone manufacturers need to be upfront about security updates with clear information about how long they will last and what customers should do when they run out. The government must also push ahead with planned legislation to ensure manufacturers are far more transparent about security updates for smart devices and their impact on consumers," Kate added.

Android phone released around 2012 or earlier, including popular models like the Samsung Galaxy S3 and Sony Xperia S, are particularly at risk to hackers.

Which? has made suggestions to Android users on what to consider if they have an older phone that may be at risk.

Any Android device which is more than two years old, check whether it can be updated to a newer version of the operating system. If it is on an earlier version than Android 7.0 Nougat, try to update via Settings> System>Advanced System update.

In case a user is not able tto update the phone, the device could be at risk of being hacked if it is running a version of Android 4 or lower.

A user also need to be careful about downloading apps outside the Google Play store and should also install a mobile anti-virus via an app.

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