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Dwarf star found orbiting closest to black hole

Researchers have found evidence of a white dwarf star orbiting a likely black hole at a distance of only 961,000 km at an astonishing speed

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star orbiting black hole, wikimedia

New York, March 14, 2017: Researchers have found evidence of a white dwarf star orbiting a likely black hole at a distance of only 961,000 km — just about 2.5 times the distance between the Earth and the Moon.

In a tightest orbital dance ever witnessed for a black hole and a companion star, the star whips around the black hole at an astonishing speed — about two orbits an hour, said the study published in the journal Monthly Notices of the Royal Astronomical Society.

“This white dwarf is so close to the black hole that material is being pulled away from the star and dumped onto a disk of matter around the black hole before falling in,” said study lead author Arash Bahramian, affiliated with the University of Alberta in Canada and Michigan State University in the US.

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“Luckily for this star, we don’t think it will follow this path into oblivion, but instead will stay in orbit,” Bahramian said.

Although the white dwarf does not appear to be in danger of falling in or being torn apart by the black hole, its fate is uncertain.

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The stellar system, known as X9, is located in the globular cluster 47 Tucanae, a dense cluster of stars in our galaxy about 14,800 light years away from the Earth.

“For a long time astronomers thought that black holes were rare or totally absent in globular star clusters,” study co-author Jay Strader from Michigan State University said.

“This discovery is additional evidence that, rather than being one of the worst places to look for black holes, globular clusters might be one of the best,” Strader added.

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For the study, the researchers used data from the Australia Telescope Compact Array as well as NASA’s Chandra X-ray Observatory and NuSTAR telescope. (IANS)

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Chinese Authorities Suspends Website for Black Hole Copyright: Report

Founded in June 2000, VCG had collected revenues to the tune of 700 million yuan ($104.18 million) in the first three quarters of 2018

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US clothing brand Gap has apologised for selling T-shirts which it said showed an
Accurate Map of China. Pixabay

Chinese authorities have suspended the website of the country’s largest stock images provider after it was found to have put its copyright mark on the first ever photo taken of a black hole, state-owned China Daily newspaper reported on Friday.

Visual China Group (VCG) has been alleged to have published with its watermark the black hole photo soon after it was released on Wednesday, leading the cyberspace affairs authority in Tianjin (north) to suspend its website, Efe news reported citing the daily.

The incident led to the National Copyright Administration in China announcing that it would launch a campaign to regulate the image copyright market, underlining that firms should set up mechanisms to uphold copyright as per legal requirements.

The copyright claim over a picture, which was released by Event Horizon Telescope and was not meant for commercial usage, meant that users downloading the image from VCG were required to pay for it.

All images provided by organizations like the European Southern Observatory and the National Aeronautics and Space Administration are available for free as long as users cite the source.

The photo of the black hole, located 53.3 million light years from the Earth and taken by the Event Horizon Telescope, also fell under this category.

Black Hole
An image of the black hole at the center of Messier 87, a massive galaxy in the nearby Virgo galaxy cluster. This black hole resides 55 million light-years from Earth and has a mass 6.5-billion times that of the sun.
VOA

The Chinese company issued a statement saying they had obtained the rights of the image for use in the media and not for commercial use such as advertisements.

However, ESO – which holds the rights over the image – has denied having received any message from VCG, and said it was illegal for the Chinese firm to ask money for the use of the photo.

The incident led to protests in social networks in the Asian country, some of them from other companies and organizations that found their own content on the VCG website.

Also Read- Collective Attention Span Among People Decreases Rapidly as of 24/7 News Availability

Moreover, the Communist Youth League Central Committee, on its official handle on Weibo – Chinese equivalent of Twitter – criticized VCG for making users pay for photographs of the national emblem on its website.

The authorities at Tianjin decided to suspend the website in the wake of the controversy, even though VCG released another statement with an apology and admitting that many of its images came from third parties without any ties to their company.

Founded in June 2000, VCG had collected revenues to the tune of 700 million yuan ($104.18 million) in the first three quarters of 2018. (IANS)