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The blue supergiant Sanduleak -69° 202a 3D Model
Blue supergiants (BSG) are massive stars which end their lives with violent supernova explosions. The model shows the inhomogeneous circumstellar medium around Sanduleak -69° 202, the progenitor BSG of supernova (SN) 1987A, immediately before the collapse of the core. The BSG is barely visible in the center of the scene (zoom in to see the BSG). The red-yellow torus around the star is gas accumulated during the interaction between a slow dense wind of a previous phase of star evolution (when it was a red supergiant) and the faster wind of the BSG. The lines are sampled magnetic field lines; the arrows describe the velocity field of the stellar wind which is collimated in polar directions.
MHD simulation performed with the PLUTO code.
Reference: Orlando et al. 2019, A&A 622, id.A73.
Credits: INAF-Osservatorio Astronomico di Palermo. The Milky Way image is from ESO/S. Brunier.
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