Influence of the Stellar Population on Type Ia Supernovae: Consequences for the Determination of Omega

Abstract

The influence of the metallicity at the main sequence on the chemical structure of the exploding white dwarf, the nucleosynthesis during the explosion and the light curves of an individual Type Ia supernovae have been studied. Detailed calculations of the stellar evolution, the explosion, and light curves of delayed detonation models are presented. Detailed stellar evolution calculations with a main sequence mass of 7 M_o have been performed to test the influence of the metallicity Z on the structure of the progenitor. A change of Z influences the central helium burning and, consequently, the size of the C/O core which becomes a C/O white dwarf and its C/O ratio. Subsequently, the white dwarf may grow to the Chandrasekhar mass and explode as a Type Ia supernovae. Consequently, the C/O structure of the exploding white dwarf depends on Z. Since C and O are the fuel for the thermonuclear explosion, Z indirectly changes the energetics of the explosion. In our example, changing Z from Pop I to Pop II causes a change in the zero point of the maximum brightness/decline relation by about $0.1^m$ and a change in the rise time by about 1 day. Combined with previous studies, We provide a relation between a change of the rise time in SNeIa and the off-set in the brightness/decline relation. We find that dM = dt where dM is the offset in the relation and dt is the change of the rise time in days. This relation provides a way to detect and test for evolutionary effects, and to estimate the possible consequences for the determination of the cosmological constant. However, due to uncertainties in the time evolution of the properties of the progenitors, we cannot predict whether evolution becomes important at z=0.5, 1 or 2. This question has to be answered by observations.

8 pages, 5 figures, macros 'aas2pp4.sty'. The Astrophysical Journal (accepted)

References in corpus (3)

• The Type Ia Supernova 1998bu in M96 and the Hubble Constant
• A Preliminary Indication of Evolution of Type Ia Supernovae from their Risetimes
• The Origin of Diversity of Type Ia Supernovae and Environmental Effects

Cited by in corpus (43)

• Two populations of progenitors for type Ia SNe?
• The Dependence of Type Ia Supernova Luminosities on their Host Galaxies
• On Variations in the Peak Luminosity of Type Ia Supernovae
• Theoretical light curves for deflagration models of Type Ia supernova
• Infrared Spectra of the Subluminous Type Ia Supernova 1999by
• On the evolution of rapidly rotating massive white dwarfs towards supernovae or collapses
• Median Statistics, H_0, and the Accelerating Universe
• Characterizing Supernova Progenitors via the Metallicities of their Host Galaxies, from Poor Dwarfs to Rich Spirals
• Evidence for Asphericity in a Subluminous Type Ia Supernova: Spectropolarimetry of SN 1999by
• The Progenitors of Subluminous Type Ia Supernovae
• Constraints on the Progenitors of SNeIa & Implications for the Cosmological Equation of State
• Chemistry and Star Formation in the Host Galaxies of Type Ia Supervovae
• Bounds on the possible evolution of the Gravitational Constant from Cosmological Type-Ia Supernovae
• Presupernova evolution of accreting white dwarfs with rotation
• The Case for an Accelerating Universe from Supernovae
• The Hubble Diagram of Type Ia Supernovae as a Function of Host Galaxy Morphology
• On the Thermonuclear Runaway in Type Ia Supernovae: How to run away?
• Supernova cosmology: legacy and future
• Gravitational Settling of 22Ne in Liquid White Dwarf Interiors
• Photometric selection of high-redshift type Ia supernovae
• Metallicity effect in multi-dimensional SNIa nucleosynthesis
• Secondary Parameters of Type Ia Supernova Light Curves
• Measurement of Ω_m, Ω_Λ from a blind analysis of Type Ia supernovae with CMAGIC: Using color information to verify the acceleration of the Universe
• Effects of rotation on the helium burning shell source in accreting white dwarfs
• Evaluating Systematic Dependencies of Type Ia Supernovae: The Influence of Progenitor Ne22 Content on Dynamics
• Near-Infrared and Optical Observations of Type Ic SN2020oi and broad-lined Ic SN2020bvc: Carbon Monoxide, Dust and High-Velocity Supernova Ejecta
• Cosmological-Model-Parameter Determination from Satellite-Acquired Type Ia and IIP Supernova Data
• Hubble Space Telescope Studies of Nearby Type Ia Supernovae: The Mean Maximum Light Ultraviolet Spectrum and its Dispersion
• Red and Reddened: Ultraviolet through Near-Infrared Observations of Type Ia Supernova 2017erp
• The Convective Urca Process with Implicit Two-Dimensional Hydrodynamics
• Was SN1997ff at z~1.7 magnified by gravitational lensing?
• Imaging and Demography of the Host Galaxies of High-Redshift Type Ia Supernovae
• Properties of cosmologies with dynamical pseudo Nambu-Goldstone bosons
• Q-LET - Quick Lensing Estimation Tool - An application to SN2003es
• Spectroscopy of the Supernova H0pe Host Galaxy at Redshift 1.78
• Redshift-distance relations from type Ia supernova observations. New constraints on grey dust models
• A Photometric Analysis of the Relationship Between Type Ia Supernova UV Flux and Host Galaxy Metallicity
• Spectral Models for Early Time SN 2011fe Observations
• Type Ia Supernova Progenitor Properties and Their Host Galaxies
• Evidence for Evolution or Bias in Host Extinctions of Type 1a Supernovae at High Redshift
• Investigating the Unusual Spectroscopic Time-Evolution in SN 2012fr
• Problems with the Current Cosmological Paradigm
• Verifying the use of supernovae as probes of the cosmic expansion