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Congratulations to Prof. Albert Kong and PhD student Yi-Chi Chang, the research findings have published on the NASA official website.

NTHU Astronomers Spot an Exceptionally Rare Intermediate-mass Black Hole Eating a Star

A group of stars in space

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An international research team led by Prof. Albert Kong from the Institute of Astronomy at National Tsing Hua University has discovered a suspected intermediate-mass black hole that devours a hapless bypassing star in the outskirts of the galaxy NGC 6099, located in the constellation Hercules approximately 450 million light-years away from Earth. The research findings have been published in The Astrophysical Journal and have caught attention from NASA/Space Telescope Science Institute, which featured the research results on the NASA official website on July 24th.

https://science.nasa.gov/missions/hubble/nasas-hubble-chandra-spot-rare-type-of-black-hole-eating-a-star/

 

Black holes are considered among the most extraordinary objects in the universe. Currently, the existence of stellar-mass black holes and supermassive black holes has been widely confirmed. However, intermediate-mass black holes, whose mass falls between these two categories, are extremely rare. Yi-Chi Chang, a graduate student at the Institute of Astronomy at National Tsing Hua University, discovered a rare hyperluminous X-ray source using NASA's Hubble Space Telescope and Chandra X-ray Observatory. After several years of systematic tracking and research, she believes there is a high probability that this phenomenon originates from an intermediate-mass black hole devouring a star — in what astronomers call a tidal disruption event.

 

Official press release with related images, animation, and video from NASA:

https://science.nasa.gov/missions/hubble/nasas-hubble-chandra-spot-rare-type-of-black-hole-eating-a-star/

 

Science paper:

Chang, Y.-C., Soria, R., Kong, A.K.H., Graham, A.W., Grishin, K.A., Chilingarian, I.V., “Multiwavelength Study of a Hyperluminous X-Ray Source near NGC 6099: A Strong IMBH Candidate”, The Astrophysical Journal, Volume 983, Issue 2, id.109 (2025)


 

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