2024-03-13 ミシガン大学
＜関連情報＞
- https://news.umich.edu/explaining-a-supernovas-string-of-pearls/
- https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.132.111201
SN1987Aと他の恒星の赤道リングに沿った凝集の流体力学的メカニズム Hydrodynamic Mechanism for Clumping along the Equatorial Rings of SN1987A and Other Stars
Michael J. Wadas, William J. White, Heath J. LeFevre, Carolyn C. Kuranz, Aaron Towne, and Eric Johnsen
Physical Review Letters Published 13 March 2024
DOI:https://doi.org/10.1103/PhysRevLett.132.111201
ABSTRACT
An explanation for the origin and number of clumps along the equatorial ring of Supernova 1987A has eluded decades of research. Our linear analysis and hydrodynamic simulations of the expanding ring prior to the supernova reveal that it is subject to the Crow instability between vortex cores. The dominant wave number is remarkably consistent with the number of clumps, suggesting that the Crow instability stimulates clump formation. Although the present analysis focuses on linear fluid flow, future nonlinear analysis and the incorporation of additional stellar physics may further elucidate the remnant structure and the evolution of the progenitor and other stars.
