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Supermassive black holes spotted in 2 dwarf galaxies

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New York, April 18: Astronomers have found two ultra-compact dwarf galaxies with supermassive black holes that take up a high percentage of the compact galaxies’ total mass.

The findings, published in the Astrophysical Journal, suggest that dwarfs may be remnants of massive galaxies that were ripped apart by larger galaxies and that black holes lurk at the centre of most of these objects, potentially doubling the number of supermassive black holes known in the universe.

“We still don’t fully understand how galaxies form and evolve over time. These objects can tell us how galaxies merge and collide,” said lead author Chris Ahn from University of Utah in the US.

“Maybe a fraction of the centers of all galaxies are actually these compact galaxies stripped of their outer parts,” Ahn said.

The authors measured two ultra-compact dwarf galaxies, named VUCD3 and M59cO, that lie far beyond the spiral arms of our Milky Way, orbiting massive galaxies in the Virgo galaxy cluster.

They detected a supermassive black hole in both galaxies — VUCD3’s black hole has a mass equivalent to 4.4 million suns, making up about 13 per cent of the galaxy’s total mass, and M59cO’s black hole has a mass of 5.8 million suns, making up about 18 per cent of its total mass.

By comparison, the monstrous black hole at the centre of the Milky Way has a mass of four million suns, but makes up less than .01 per cent of the galaxy’s total mass.

“It’s pretty amazing when you really think about it. These ultra-compact dwarfs are around 0.1 per cent the size of the Milky Way, yet they host supermassive black holes that are bigger than the black hole at the center of our own galaxy,” Ahn said.

To calculate the ultra-compact dwarf galaxies’ mass, the astronomers measured the movement of the stars using the Gemini North telescope located on Mauna Kea volcano in Hawaii.

IANS

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Google reveals security flaw in Microsoft Edge

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San Francisco, Feb 20: Google has made public the details of a medium-level security flaw in Microsoft Edge browser whose patch is still not produced.

The vulnerability was first discovered in November 2017, by the search giant’s Project Zero.

According to Engadget, taking advantage of the flaw, hackers could bypass Microsoft Edge’s existing security measures to inject malicious code into a victim’s computer.

Google, through its Project Zero, notified Microsoft about a bug in November, giving the company the usual 90-day disclosure deadline.

With the three-month deadline over, the team of security analysts employed by Google tasked with finding zero-day vulnerabilities — Project Zero –went public with the details of the security flaw.

The search giant granted a 14-day extension to Microsoft after it said that the problem was complex and it needed more time to fix it.

But, Microsoft even missed the second deadline to produce the patch of the vulnerability. However, given Edge’s small market share, the security issue was unlikely to affect too many people though it is still embarrassing for the company.

IANS

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M-tech launches 4G smartphone at Rs 4,499

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New Delhi, Feb 19: Domestic mobile manufacturer M-tech on Monday launched a new 4G VoLTE smartphone “Foto 3” at Rs 4,499.

The device comes with 5-inch FVWGA LCD display and is powered by 1.3 GHz quad core processor paired with 1GB RAM and 8GB internal storage, which is expandable upto 32 GB.

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“With ‘Foto 3’, Internet-savvy users can now avail super-fast data connectivity and superior voice call quality. We are positive that the ‘Foto 3’ will certainly appeal to our customers,” Goutam Kumar Jain, Co-Founder, M-tech Informatics Ltd, said in a statement.

The device runs Android 7.0 Nougat operating system (OS) and houses 2400 mAh Li-Ion battery. It also sports 2+ VGA dual rear camera and a VGA front camera.

The product is available on both online and offline platforms.

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Pay utility bills now with Google ‘Tez’

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New Delhi, Feb 19: Google India on Monday announced that people can now pay water, electricity, DTH and mobile bills with its “Tez” digital payment app without any transaction charges.

Built on the Unified Payments Interface (UPI), the “Tez” app will bring bill payments for over 80 billers for private and public utility service providers across the country.

“We are adding a specially-designed bill pay experience in ‘Tez’ which will enable users to make a wide range of bill payments, including electricity, water, gas, DTH and insurance from the app,” said Diana Layfield, Vice President, Payments and Commerce, Next Billion Users at Google.

The new bill pay feature would include major utilities like Reliance Energy, BSES and Dish TV and would cover all states and major metros.

Built to support “Bharat BillPay” system, “Tez” would send users a notification when their bill arrives and users would be able to check whether they have paid a bill by simply tapping the biller’s name on their “Tez” home screen.

Users would also be able to view all past payments grouped by bill, as well as manage bills from multiple accounts.

Once users have located their biller, they need to enter the number associated with their account to link it to Tez and give it an easy name to remember.

After users have linked their account, for most utility bills Tez would automatically fetch any available bills. Users need to just tap on “New Payment” and then “Pay your bills”.

IANS

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