1 / 12

Evolution of the circumstellar medium around massive stars

Sabina-M ă d ă lina Chi ţă , Norbert Langer, Allard-Jan van Marle Sterrenkundig Instituut Universiteit Utrecht. Evolution of the circumstellar medium around massive stars. NGC 7635 (The Bubble Nebula). stellar wind bubble H II region (photoionized) 3 pc wide.

olliek
Download Presentation

Evolution of the circumstellar medium around massive stars

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

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

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

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

  4. Stellar wind mass-loss history • RSG-> BSG-> RSG • mass loss • velocity • photoionization

  5. ZEUS -3D code • hydrodynamicalcode: credit Stone & Norman (1992) • solvesthe Euler equations on a fixed grid • photoionization: credit García-Segura (1999) • rotation: wind compressed disk model: credit Cassinelli & Bjorkman (1992)

  6. 1D simulation of MS • end of MS stage • photoionized region • hot bubble • MS shell

  7. 1D simulation of RSG • MS -> RSG • old MS shell • new MS shell(hot bubble shell) • no photo-ionization • RSG shell

  8. 2D simulation of RSG-> BSG-> RSG

  9. 2D simulation of pre-supernova • final stage: pre-supernova • RSG shell

  10. 2D simulation • RSG shell • 3 pc

  11. Outlook • SN 1987 A • BSG progenitor of SN1987 A

  12. Thank you !

More Related