Evolution of the circumstellar medium around massive stars

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Presentation transcript:

Evolution of the circumstellar medium around massive stars Sabina-Mădălina Chiţă , Norbert Langer, Allard-Jan van Marle Sterrenkundig Instituut Universiteit Utrecht

NGC 7635 (The Bubble Nebula) stellar wind bubble H II region (photoionized) 3 pc wide

H-R diagram for 12 M⊙ star Presupernova stage : MS-> RSG-> BSG-> RSG data credit :A.Heger, Los Alamos

Stellar wind mass-loss history RSG-> BSG-> RSG mass loss velocity photoionization

ZEUS -3D code hydrodynamical code: credit Stone & Norman (1992) solves the Euler equations on a fixed grid photoionization: credit García-Segura (1999) rotation: wind compressed disk model: credit Cassinelli & Bjorkman (1992)

1D simulation of MS end of MS stage photoionized region hot bubble MS shell

1D simulation of RSG MS -> RSG old MS shell new MS shell(hot bubble shell) no photo- ionization RSG shell

2D simulation of RSG-> BSG-> RSG

2D simulation of pre-supernova final stage: pre- supernova RSG shell

2D simulation RSG shell 3 pc

Outlook SN 1987 A BSG progenitor of SN1987 A

Thank you !

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