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Hydrodynamic Simulations of Starburst-driven Su...

Hydrodynamic Simulations of Starburst-driven Superwinds

Talk presented at Challenges and Innovations in Computational Astrophysics - III (ChaICA-III; Virtual), 21 June 2021

Ashkbiz Danehkar

June 21, 2021
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  1. Ashkbiz Danehkar Department of Astronomy, University of Michigan [email protected] In

    Collaborations with: Sally Oey, and Will Gray Challenges and Innovations in Computational Astrophysics - III, June 21, 2021 Hydrodynamic Simulations of Starburst-driven Superwinds Superbubble in NGC 3079 (Credit: X-ray:NASA/CXC/UMich/J-T Li;Optical:NASA/STScI)
  2. 21/06/2021 ChaICA-III 2 Outline  Superwinds & Superbubbles – Superwind

    Theory: Adiabatic Solution – Superbubble & Superwind Theory  Catastrophic Cooling – Superwind Theory: Radiative Solution  Hydrodynamic Simulations  Photoionization Modeling – Diagnostic Diagrams  Hydrodynamic and Photoionization Results  Summary & Future Directions
  3. 21/06/2021 ChaICA-III 3 Superwinds & Superbubbles Superwind and Superbubble in

    NGC 3079 (Credit: X-ray:NASA/CXC/UMich/J-T Li;Optical:NASA/STScI)
  4. 21/06/2021 ChaICA-III 5 Superwind Theory: Adiabatic Adiabatic Solutions – Adiabatic

    Wind (γ=5/3) – Chevalier & Clegg 1985 Chevalier & Clegg 1985
  5. 21/06/2021 ChaICA-III 6 Superwind Theory: Adiabatic Adiabatic Bubble Solutions –

    Castor+ 1975 – Weaver+ 1977 Weaver+ 1977 Weaver+ 1977
  6. 21/06/2021 ChaICA-III 8 Catastrophic Cooling NGC 2366 Green Pea analog!

    [O II], [O III] and Continuum (Oey+ 2017) Mrk 71 Oey + 2017
  7. 21/06/2021 ChaICA-III 10 Superwind Theory: Radiative  Radiative Solutions –

    Silich et al. 2004 – With Radiative Cooling Silich + 2004
  8. 21/06/2021 ChaICA-III 14 Hydrodynamic Simulations MAIHEM Package built on FLASH

    code (Will + 2015) Temperature Density Danehkar, Oey, Gray, 2021
  9. 21/06/2021 ChaICA-III 15 Hydrodynamic Simulations Radiative Cooling  adiabatic bubble

    (AB), adiabatic pressure-confined (AP)  catastrophic cooling (CC), catastrophic cooling bubble (CB) Temperature discrepancy factor (fT = Tw / Tadi) Danehkar, Oey, Gray, 2021
  10. 21/06/2021 ChaICA-III 18 Photoionization Modeling Danehkar, Oey, Gray, 2021 PI

    (Pure Photoionization), CPI (Photoionization + Hydro Collisional Ionization)
  11. 21/06/2021 ChaICA-III 23 Model Results Danehkar, Oey, Gray, 2021 

    Hydrodynamics & Photoionization Results https://superwinds.astro.lsa.umich.edu/
  12. 21/06/2021 ChaICA-III 24 Summary  Superwind Theory – Adiabatic Solution

    (Chevalier & Clegg 85) – Radiative Solution (Silich + 2004)  Hydrodynamic Simulations – Catastrophic Cooling (Gray, Oey, Silich, 2019) – Radiative Cooling increases with (Danehkar, Oey, Gray, 2021): • higher mass-loading, lower outflow velocity, higher metallicity  Photoionization Modeling (Photoionization + Hydro Collisional Ionization) – Emission lines predicted for adiabatic and cooling outflows – BPT & UV Diagnotic Diagrams  Future Directions – Non-equilibrium Photoionization (Photoionization + NEI; next work) – 2-D simulations: Instability-induced gas clumping
  13. 21/06/2021 ChaICA-III 25 Thank you for your attention Superbubble in

    NGC 3079 (Credit: X-ray:NASA/CXC/UMich/J-T Li;Optical:NASA/STScI)