A simple model of time-dependent ionization in Type IIP supernova envelopes
arXiv:1906.11206 · doi:10.1093/mnras/stz3152
Abstract
We propose a model kinetic system of the hydrogen atom (two levels plus continuum) under the conditions typical for atmospheres of Type IIP supernovae in the plateau stage. Despite the simplicity of this system, it describes realistically the basic properties of the complete system. Analysis shows that the ionization "freeze-out" effect is always manifest at large times. We give a simple criterion for checking the statistical equilibrium of a system under the given conditions at any time. It is shown that if the system is in non-equilibrium at early times, the time-dependent effect of ionization necessarily exists. We also generalize this criterion to the case of arbitrary multilevel systems. We discuss various factors that affect the strength of the time-dependent effect in the kinetics during the photospheric phase of a supernova explosion.
arXiv comment14 pages, 9 figures
References in corpus (19)
- Milky Way Cepheid Standards for Measuring Cosmic Distances and Application to Gaia DR2: Implications for the Hubble Constant
- A Density Matrix-based Algorithm for Solving Eigenvalue Problems
- A comparative modeling of supernova 1993J
- Radiation hydrodynamics of SN 1987A: I. Global analysis of the light curve for the first 4 months
- Does the Hubble constant tension call for new physics?
- Theoretical light curves for deflagration models of Type Ia supernova
- Type II-Plateau supernova radiation: dependencies on progenitor and explosion properties
- Dark Energy in light of Multi-Messenger Gravitational-Wave astronomy
- Time Dependent Radiative Transfer Calculations for Supernovae
- Using Quantitative Spectroscopic Analysis to Determine the Properties and Distances of Type II-Plateau Supernovae: SNe 2005cs and 2006bp
- An optimal hydrodynamic model for the normal Type IIP supernova 1999em
- Type IIP Supernovae as Cosmological Probes: A SEAM Distance to SN 1999em
- Time-dependent Effects in Photospheric-Phase Type II Supernova Spectra
- Strong effects of time-dependent ionization in early SN 1987A
- Spectral modeling of type II supernovae. I. Dilution factors
- Direct Distance Measurements to SN2009ip
- Study of Supernovae Important for Cosmology
- On the Hydrogen Recombination Time in Type II Supernova Atmospheres
- Direct Determination of Hubble Parameter Using Type IIn Supernovae