Hydrodynamic Simulations and Time-dependent Photoionization Modeling of Starburst-driven Superwinds

Talk presented at IAU Symposium 362 (IAUS362): Predictive Power of Computational Astrophysics as a Discovery Tool (Online Video-Conference), November 8, 2021

Transcript

1. Hydrodynamic Simulations and Hydrodynamic Simulations and Time-dependent Photoionization Modeling of Time-dependent Photoionization Modeling of Starburst-driven Superwinds Starburst-driven Superwinds Ashkbiz Danehkar Department of Astronomy, University of Michigan danehkar@umich.edu In Collaborations with: Sally Oey, and Will Gray IAUS 362: Predictive Power of Computational Astrophysics as a Discovery Tool, November 8, 2021 Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
2. 08 Nov 2021 IAUS362 2 Cooling Superwinds M82 (Cigar Galaxy) M82 (Cigar Galaxy) Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)
3. 08 Nov 2021 IAUS362 3 Starburst-driven Superwinds Starburst-driven Outflows (Romero+ 2018, Strickland+ 2003)
4. 08 Nov 2021 IAUS362 4 Superwind Theory  Adiabatic Analytic Solution – Chevalier & Clegg 1985  Radiative Semi-analytic Solutions – Silich + 2004 – With Radiative Cooling Silich + 2004
5. 08 Nov 2021 IAUS362 5 Superwind Theory Radiative Cooling Silich + 2004 Silich + 2004
6. 08 Nov 2021 IAUS362 6 Superwind Theory Different Wind Regions, as defined by Weaver+ 1977
7. 08 Nov 2021 IAUS362 7 Hydrodynamic Simulations Danehkar, Oey, Gray, 2021 (ApJ 921, 91)
8. 08 Nov 2021 IAUS362 8 Hydrodynamic Simulations Cooling Function (Λ) and Photo-Heating Function (Γ): the Atomic Chemistry and Cooling Package MAIHEM (Gray + 2019):  Ion-by-ion Cooling Efficiencies from (Λ i ) from Gnat & Ferland 2012.  Heating Efficiencies from (Γ i ) made with photoionization cross sections from Verner & Yakovlev 1995, and Verner, Ferland, et al. 1996.
9. 08 Nov 2021 IAUS362 9 Hydrodynamic Simulations Model Grids: https://superwinds.astro.lsa.umich.edu/ Temperature Density Danehkar, Oey, Gray, 2021 (ApJ 921,91)
10. 08 Nov 2021 IAUS362 10 Hydrodynamic Simulations  Adiabatic Bubble (AB)  Catastrophic Cooling Bubble (CB)  Catastrophic Cooling (CC) Danehkar, Oey, Gray, 2021
11. 08 Nov 2021 IAUS362 11 Hydrodynamic Simulations  Adiabatic Bubble (AB), Adiabatic Pressure-Confined (AP)  Catastrophic Cooling (CC), Catastrophic Cooling Bubble (CB) Temperature discrepancy factor (fT = Tw / Tadi) Danehkar, Oey, Gray, 2021 (ApJ 921,91)
12. 08 Nov 2021 IAUS362 12 Danehkar, Oey, Gray, 2021 Hydrodynamic Simulations (Danehkar, Oey, Gray, 2021, ApJ 921, 91)
13. 08 Nov 2021 IAUS362 13 Photoionization Modeling (CIE+PIE=CPI) Danehkar, Oey, Gray, 2021 (ApJ 921, 91) Photoionization + Collisional Ionization
14. 08 Nov 2021 IAUS362 14 Photoionization Modeling (CIE+PIE=CPI) Danehkar, Oey, Gray, 2021 (ApJ 921, 91) PIE (Pure Photoionization), CIE+PIE=CPI (Photoionization + Collisional Ionization)
15. 08 Nov 2021 IAUS362 15 Photoionization Modeling (NEI+PIE=NPI) Danehkar, Oey, Gray, 2021 (in preparation) Photoionization + Non-equilibrium Ionization
16. 08 Nov 2021 IAUS362 16 Photoionization Modeling (NEI+PIE=NPI) PIE (Pure Photoionization), NEI+PIE=NPI (Photoionization + Non-equilibrium Ionization) CIE+PIE=CPI (Photoionization + Collisional Ionization), Danehkar, Oey, Gray, 2021 (in preparation)
17. 08 Nov 2021 IAUS362 17 Optical & UV Diagnostic Diagrams Emission Lines of Superwinds Danehkar, Oey, Gray, 2021 (ApJ 921, 91)
18. 08 Nov 2021 IAUS362 18 Optical BPT Diagrams Danehkar, Oey, Gray, 2021 (ApJ 921, 91) Optical Emission Lines (radiation-bounded)
19. 08 Nov 2021 IAUS362 19 UV Diagnostic Diagrams Danehkar, Oey, Gray, 2021 (ApJ 921, 91) UV Emission Lines (radiation-bounded)
20. 08 Nov 2021 IAUS362 20 UV Diagnostic Diagrams UV Emission Lines (radiation-bounded) Danehkar, Oey, Gray, 2021 (ApJ 921, 91)
21. 08 Nov 2021 IAUS362 21 Future Direction: Radiative Transfer Implementation of detailed Radiative Transfer (RT) calculations  Improvement of radiative cooling and photo-heating processes  Stellar flux at a given distance (e.g. Klassen + 2014):  Inclusion of radiation pressure: Included in MAIHEM Need RT calculations
22. 08 Nov 2021 IAUS362 22 Concluding Remarks  Starburst-driven SuperWinds – Adiabatic Solution (Chevalier & Clegg 85) – Radiative Solution (Silich + 2004)  Non-equilibrium Hydrodynamic Simulations of Superwinds – MAIHEM Cooling Package (Gray + 2019): Radiative Cooling + Photo-Heating – Exploring the Parameter (Danehkar, Oey, Gray, 2021, ApJ 921, 91)  Photoionizaion Modeling – CIE+PIE (Danehkar et al. ApJ, 2021, ApJ 921, 91) – NEI+PIE (Danehkar, et al. in preparation)  Future Direction – Detailed Implementation Radiative Transfer: Improved Photoionization
23. 08 Nov 2021 IAUS362 23 Thank you for your attention M82 (Cigar Galaxy) M82 (Cigar Galaxy) Image Credit: NASA, ESA, and the Hubble Heritage Team (STScI/AURA)