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M. de Avillez, D. Breitschwerdt Reporter: Sun Wei Nov 11, 2010

The Evolution of the Large-scale ISM: Bubbles and Non-Equilibrium Ionization

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The Evolution of the Large-scale ISM: Bubbles and Non-Equilibrium Ionization. M. de Avillez, D. Breitschwerdt Reporter: Sun Wei Nov 11, 2010. Introduction: CIE vs. NEI. CIE: frequent assumption good approximation in hot environments violating detailed balance - PowerPoint PPT Presentation

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Page 1: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

M. de Avillez, D. BreitschwerdtReporter: Sun Wei

Nov 11, 2010

Page 2: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Introduction: CIE vs. NEICIE:

frequent assumptiongood approximation in hot environmentsviolating detailed balanceCan never be maintained in evolving plasma

NEI:Thermodynamic path dependentTime-dependent

Page 3: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Cooling processesElectron impact ionization Excitation-autoionizationRadiation & dielectronic recombinationCharge-exchange recombination & ionizationContinuum & line emissions

Page 4: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Cooling processes (Ref)Arnaud & Rothenflug 1985 Arnaud & Raymond 1992Mazzotta et al. 1998Mazzitelli & Mattioli 2002Mattioli et al. 2006, 2007Radiation & dielectronic recombination

Verner & Ferland 1996 (RR rate)Gu 2003 (DR rate)Bryans 2006Badnell 2003, 2006 (RR & DR data tables)

amdpp.phys.strath.ac.uk/tamoc/RR/ or …/DR/

Page 5: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

NEI equations

Page 6: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Plasma Modeling: EPECAbundance: 10 elements and solar abundance

(Asplund et al. 2009)Initial Condition: isochoric full ionized gas

cooling from 1e9 K

Page 7: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Ionization Fraction

Page 8: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Cooling Function

Page 9: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

CIE vs. NEI

Page 10: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Combination Lag

Page 11: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

Disk-halo interaction simulation: bubbles and superbubbles

Page 12: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization

ConclusionCooling Function:

Time-dependentInitial condition dependentHistory dependent

Expanding vs. static: occurrence X-ray emission

Delayed Recombination: mismatch of recombination and dynamical time scales

Page 13: The Evolution of the Large-scale  ISM: Bubbles  and Non-Equilibrium Ionization