A galaxy-driven model of type Ia supernova luminosity variations

Abstract

Type Ia supernovae (SNe Ia) are used as standardisable candles to measure cosmological distances, but differences remain in their corrected luminosities which display a magnitude step as a function of host galaxy properties such as stellar mass and rest-frame $U-R$ colour. Identifying the cause of these steps is key to cosmological analyses and provides insight into SN physics. Here we investigate the effects of SN progenitor ages on their light curve properties using a galaxy-based forward model that we compare to the Dark Energy Survey 5-year SN Ia sample. We trace SN Ia progenitors through time and draw their light-curve width parameters from a bimodal distribution according to their age. We find that an intrinsic luminosity difference between SNe of different ages cannot explain the observed trend between step size and SN colour. The data split by stellar mass are better reproduced by following recent work implementing a step in total-to-selective dust extinction ratio $(R_V)$ between low- and high-mass hosts, although an additional intrinsic luminosity step is still required to explain the data split by host galaxy $U-R$. Modelling the $R_V$ step as a function of galaxy age provides a better match overall. Additional age vs. luminosity steps marginally improve the match to the data, although most of the step is absorbed by the width vs. luminosity coefficient $\alpha$. Furthermore, we find no evidence that $\alpha$ varies with SN age.

arXiv comment20 pages, 16 figures. Accepted for publication in MNRAS

References in corpus (60)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Stellar population synthesis at the resolution of 2003
• Galactic Stellar and Substellar Initial Mass Function
• The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
• The Origin of the Mass--Metallicity Relation: Insights from 53,000 Star-Forming Galaxies in the SDSS
• The Complete Light-curve Sample of Spectroscopically Confirmed Type Ia Supernovae from Pan-STARRS1 and Cosmological Constraints from The Combined Pantheon Sample
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• Metallicity Calibrations and the Mass-Metallicity Relation for Star-Forming Galaxies
• CIGALE: a python Code Investigating GALaxy Emission
• The Dark Energy Camera
• SALT2: using distant supernovae to improve the use of Type Ia supernovae as distance indicators
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• A Precise Distance Indicator: Type Ia Supernova Multicolor Light Curve Shapes
• First-year Sloan Digital Sky Survey-II (SDSS-II) Supernova Results: Hubble Diagram and Cosmological Parameters
• Dust Attenuation Curves in the Local Universe: Demographics and New Laws for Star-forming Galaxies and High-redshift Analogs
• Galaxy Stellar Mass Functions from ZFOURGE/CANDELS: An Excess of Low-Mass Galaxies Since z=2 and the Rapid Buildup of Quiescent Galaxies
• SNLS3: Constraints on Dark Energy Combining the Supernova Legacy Survey Three Year Data with Other Probes
• The Dependence of Type Ia Supernova Luminosities on their Host Galaxies
• Type Ia Supernovae: Influence of the Initial Composition on the Nucleosynthesis, Light Curves, Spectra and Consequences for the Determination of Omega_M & Lambda
• Hubble Residuals of Nearby Type Ia Supernovae Are Correlated with Host Galaxy Masses
• The Universal Relation of Galactic Chemical Evolution: The Origin of the Mass-Metallicity Relation
• Rest-frame ultraviolet-to-optical spectral characteristics of extremely metal-poor and metal-free galaxies
• The Diversity of Type Ia Supernovae from Broken Symmetries
• Correcting Type Ia Supernova Distances for Selection Biases and Contamination in Photometrically Identified Samples
• The relation between metallicity, stellar mass and star formation in galaxies: an analysis of observational and model data
• The HDUV Survey: A Revised Assessment of the Relationship between UV Slope and Dust Attenuation for High-Redshift Galaxies
• Host Galaxy Properties and Hubble Residuals of Type Ia Supernovae from the Nearby Supernova Factory
• Type Ia Supernova Light Curve Inference: Hierarchical Models in the Optical and Near Infrared
• It's Dust: Solving the Mysteries of the Intrinsic Scatter and Host-Galaxy Dependence of Standardized Type Ia Supernova Brightnesses
• Chemistry and Star Formation in the Host Galaxies of Type Ia Supervovae
• Strong Dependence of Type Ia Supernova Standardization on the Local Specific Star Formation Rate
• First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Analysis, Systematic Uncertainties, and Validation
• Ages of Type Ia Supernovae Over Cosmic Time
• First-year Sloan Digital Sky Survey-II (SDSS-II) supernova results: consistency and constraints with other intermediate-redshift datasets
• Characterising the environments of supernovae with MUSE
• PISCO: The Pmas/ppak Integral-field Supernova hosts COmpilation
• A More General Model for the Intrinsic Scatter in Type Ia Supernova Distance Moduli
• Measuring Type Ia Supernova Populations of Stretch and Color and Predicting Distance Biases
• Nearby supernova host galaxies from the CALIFA Survey: I. Sample, data analysis, and correlation to star-forming regions
• Dependence of Type Ia supernova luminosities on their local environment
• Cosmological Constraints from Multiple Probes in the Dark Energy Survey
• Galaxy And Mass Assembly (GAMA): A forensic SED reconstruction of the cosmic star formation history and metallicity evolution by galaxy type
• First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: The Effect of Host Galaxy Properties on Supernova Luminosity
• The Observed Relation between Stellar Mass, Dust Extinction and Star Formation Rate in Local Galaxies
• First Cosmology Results using Type Ia Supernova from the Dark Energy Survey: Simulations to Correct Supernova Distance Biases
• First Cosmology Results Using Type Ia Supernovae From the Dark Energy Survey: Photometric Pipeline and Light Curve Data Release
• The Effect of Environment on Type Ia Supernovae in the Dark Energy Survey Three-Year Cosmological Sample
• Improved Treatment of Host-Galaxy Correlations in Cosmological Analyses With Type Ia Supernovae
• The Type Ia Supernova Color-Magnitude Relation and Host Galaxy Dust: A Simple Hierarchical Bayesian Model
• Redshift evolution of the underlying type Ia supernova stretch distribution
• Rates and delay times of type Ia supernovae in the Dark Energy Survey
• Accuracy of environmental tracers and consequence for determining the Type Ia Supernovae magnitude step
• The Dark Energy Survey Supernova Program: Modelling selection efficiency and observed core collapse supernova contamination
• On the dependence of the type Ia SNe luminosities on the metallicity of their host galaxies
• Determining Type Ia Supernovae Host galaxy extinction probabilities and a statistical approach to estimating the absorption-to-reddening ratio $R_V$
• Host Galaxy Mass Combined with Local Stellar Age Improve Type Ia Supernovae Distances
• Biases from Non-Simultaneous Regression with Correlated Covariates: A Case Study from Supernova Cosmology

Cited by in corpus (22)

• Concerning Colour: The Effect of Environment on Type Ia Supernova Colour in the Dark Energy Survey
• The Dark Energy Survey: Cosmology Results With ~1500 New High-redshift Type Ia Supernovae Using The Full 5-year Dataset
• Further evidence that galaxy age drives observed type Ia supernova luminosity differences
• Constraining the SN Ia Host Galaxy Dust Law Distribution and Mass Step: Hierarchical BayeSN Analysis of Optical and Near-Infrared Light Curves
• ZTF SN Ia DR2: Colour standardisation of Type Ia Supernovae and its dependence on environment
• ZTF SN Ia DR2: Environmental dependencies of stretch and luminosity of a volume limited sample of 1,000 Type Ia Supernovae
• The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties
• Revisiting progenitor-age dependence of type Ia supernova luminosity standardization process
• A Sample of Dust Attenuation Laws for DES Supernova Host Galaxies
• Using Rest-Frame Optical and NIR Data from the RAISIN Survey to Explore the Redshift Evolution of Dust Laws in SN Ia Host Galaxies
• ZTF SN Ia DR2: Study of Type Ia Supernova lightcurve fits
• A Spectroscopic Model of the Type Ia Supernova--Host Galaxy Mass Correlation from SALT3
• ZTF SN Ia DR2: Evidence of Changing Dust Distributions With Redshift Using Type Ia Supernovae
• pop-cosmos: Insights from generative modeling of a deep, infrared-selected galaxy population
• Merging White Dwarf Binaries Produce Type Ia Supernovae in Elliptical Galaxies
• Assessing differences between local galaxy dust attenuation and point source extinction within the same environments
• BayeSN and SALT: A Comparison of Dust Inference Across SN Ia Light-curve Models with DES5YR
• Stretch to stretch, dust to dust: lower-value local $H_0$ measurement from two-population modelling of type Ia supernovae
• ZTF SN Ia DR2: Impact of the galaxy cluster environment on the stretch distribution of Type Ia supernovae
• CIGaRS I: Combined simulation-based inference from type Ia supernovae and host photometry
• Training Custom Light Curve Models of SN Ia Sub-Populations Selected According to Host Galaxy Properties
• Still non-accelerating: age-bias correction in supernova cosmology is robust to host-progenitor age mapping