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Study of supergiant star Betelgeuse unveils the cause of its pulsations

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IMAGE: Stellar pulsation causes the star s brightness to vary, but the large dip in brightness in early 2020 is unprecedented. A comparison of direct images of the surface of Betelgeuse between.
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Credit: ESO/M. Montargès et al.
Betelgeuse is normally one of the brightest, most recognizable stars of the winter sky, marking the left shoulder of the constellation Orion. But lately, it has been behaving strangely: an unprecedentedly large drop in its brightness has been observed in early 2020 (Figure 1), which has prompted speculation that Betelgeuse may be about to explode.
To find out more, an international team of scientists, including Ken ichi Nomoto at the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), conducted a rigorous examination of Betelgeuse. They concluded that the star is in the early core helium-burning phase (which is more than 100,000 years before an explosion happens) and has smaller mas ....

United States , United Kingdom , Australian Capital Territory , Meridith Joyce , Kenichi Nomoto , Chiaki Kobayashi , John Amari , Shing Chi Leung , Institute Of Physics , Research School Of Astronomy , Walter Burke Institute For Theoretical Physics , University Of Hertfordshire , University Of Tokyo Institutes For Advanced Study , Department Of Physics , Australian National University , Astrophysics Research , Research Center , Research Network , Kavli Institute For The Physics , Earth Sciences , California Institute Of Technology , University Of Tokyo , Field Cosmology Research Group , Kavli Institute , California Institute , Konkoly Observatory ,

New Property Discovered at "Magic Angle"

Specially oriented twisted bilayer graphene hosts topological electronic states A sheet of magic-angle twisted bilayer graphene can host novel. ....

United States , Harpreet Arora , Cyprian Lewandowsky , Takashi Taniguchi , Jason Alicea , Yang Peng , Robert Polsky , Hyunjin Kim , Yiran Zhang , Stevan Nadj Perge , Robert Polski , Youngjoon Choi , Kenji Watanabe , Alex Thomson , Institute For Quantum Information , Kwanjeong Educational Foundation , United States Department Of Energy , Kavli Nanoscience Institute , National Institute For Materials Science , National Science Foundation , Cal State Northridge , Moore Postdoctoral Fellow , Theoretical Physics , National Institute , Materials Science , United States Department ,

New Property Discovered at the "Magic Angle"

Caltech researchers discover new topological states can develop due to electronic correlations in twisted graphene bilayer. ....

United States , Harpreet Arora , Cyprian Lewandowsky , Takashi Taniguchi , Jason Alicea , Yang Peng , Robert Polsky , Hyunjin Kim , Yiran Zhang , Stevan Nadj Perge , Robert Polski , Youngjoon Choi , Kenji Watanabe , Alex Thomson , Institute For Quantum Information , Kwanjeong Educational Foundation , United States Department Of Energy , Kavli Nanoscience Institute , National Institute For Materials Science , National Science Foundation , Cal State Northridge , Moore Postdoctoral Fellow , Theoretical Physics , National Institute , Materials Science , United States Department ,