Characterising the Standardisation Properties of Type Ia Supernovae in the z band with Hierarchical Bayesian Modelling

Abstract

Type Ia supernovae (SNe Ia) are standardisable candles: their peak magnitudes can be corrected for correlations between light curve properties and their luminosities to precisely estimate distances. Understanding SN Ia standardisation across wavelength improves methods for correcting SN Ia magnitudes. Using 150 SNe Ia from the Foundation Supernova Survey and Young Supernova Experiment, we present the first study focusing on SN Ia standardisation properties in the z band. Straddling the optical and near-infrared, SN Ia light in the z band is less sensitive to dust extinction and can be collected alongside the optical on CCDs. Pre-standardisation, SNe Ia exhibit less residual scatter in z-band peak magnitudes than in the g and r bands. SNe Ia peak z-band magnitudes still exhibit a significant dependence on light-curve shape. Post-standardisation, the z-band Hubble diagram has a total scatter of RMS $=0.195$ mag. We infer a z-band mass step of ${\gamma }_z=-0.105\pm 0.031$ mag, which is consistent within $1\sigma$ of that estimated from gri data, assuming $R_V=2.61$. When assuming different $R_V$ values for high and low mass host galaxies, the z-band and optical mass steps remain consistent within $1\sigma$. Based on current statistical precision, these results suggest dust reddening cannot fully explain the mass step. SNe Ia in the z band exhibit complementary standardisability properties to the optical that can improve distance estimates. Understanding these properties is important for the upcoming Vera Rubin Observatory and Nancy G. Roman Space Telescope, which will probe the rest-frame z band to redshifts 0.1 and 1.8.

21 pages, 10 figures; published in MNRAS

References in corpus (45)

• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• The Zwicky Transient Facility: System Overview, Performance, and First Results
• In the Realm of the Hubble tension $-$ a Review of Solutions
• The Pantheon+ Analysis: Cosmological Constraints
• Some Aspects of Measurement Error in Linear Regression of Astronomical Data
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• Stellar Population Inference with Prospector
• Measurements of the Hubble Constant: Tensions in Perspective
• Cosmological parameters from the comparison of peculiar velocities with predictions from the 2M++ density field
• Composable Effects for Flexible and Accelerated Probabilistic Programming in NumPyro
• The Carnegie Supernova Project: Intrinsic Colors of Type Ia Supernovae
• It's Dust: Solving the Mysteries of the Intrinsic Scatter and Host-Galaxy Dependence of Standardized Type Ia Supernova Brightnesses
• Measuring the Hubble constant with Type Ia supernovae as near-infrared standard candles
• Type Ia Supernovae are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL
• SALT3: An Improved Type Ia Supernova Model for Measuring Cosmic Distances
• Type Ia Supernova Light Curve Inference: Hierarchical Bayesian Analysis in the Near Infrared
• The Type Ia supernova 2004S, a clone of SN 2001el, and the optimal photometric bands for extinction estimation
• The Effect of Environment on Type Ia Supernovae in the Dark Energy Survey Three-Year Cosmological Sample
• Think Global, Act Local: The Influence of Environment Age and Host Mass on Type Ia Supernova Light Curves
• The Carnegie Supernova Project-I: Correlation Between Type Ia Supernovae and Their Host Galaxies from Optical to Near-Infrared Bands
• Union Through UNITY: Cosmology with 2,000 SNe Using a Unified Bayesian Framework
• Cosmological Results from the RAISIN Survey: Using Type Ia Supernovae in the Near Infrared as a Novel Path to Measure the Dark Energy Equation of State
• Testing the Consistency of Dust Laws in SN Ia Host Galaxies: A BayeSN Examination of Foundation DR1
• The Young Supernova Experiment Data Release 1 (YSE DR1): Light Curves and Photometric Classification of 1975 Supernovae
• Near-IR Type Ia SN distances: host galaxy extinction and mass-step corrections revisited
• A Revised SALT2 Surface for Fitting Type Ia Supernova Light Curves
• SALT3-NIR: Taking the Open-Source Type Ia Supernova Model to Longer Wavelengths for Next-Generation Cosmological Measurements
• Accuracy of environmental tracers and consequence for determining the Type Ia Supernovae magnitude step
• Concerning Colour: The Effect of Environment on Type Ia Supernova Colour in the Dark Energy Survey
• Further evidence that galaxy age drives observed type Ia supernova luminosity differences
• SALT2 Versus SALT3: Updated Model Surfaces and Their Impacts on Type Ia Supernova Cosmology
• Are Type Ia Supernovae in Restframe $H$ Brighter in More Massive Galaxies?
• SBI++: Flexible, Ultra-fast Likelihood-free Inference Customized for Astronomical Applications
• Supernovae and their host galaxies -- VII. The diversity of Type Ia supernova progenitors
• Constraining the SN Ia Host Galaxy Dust Law Distribution and Mass Step: Hierarchical BayeSN Analysis of Optical and Near-Infrared Light Curves
• The Absolute Magnitudes of 1991T-like Supernovae
• A BayeSN Distance Ladder: $H_0$ from a consistent modelling of Type Ia supernovae from the optical to the near infrared
• Host Galaxy Mass Combined with Local Stellar Age Improve Type Ia Supernovae Distances
• ZTF SN Ia DR2: Environmental dependencies of stretch and luminosity of a volume limited sample of 1,000 Type Ia Supernovae
• Using Rest-Frame Optical and NIR Data from the RAISIN Survey to Explore the Redshift Evolution of Dust Laws in SN Ia Host Galaxies
• Stellar Populations in type Ia supernova host galaxies at intermediate-high redshift: Star formation and metallicity enrichment histories
• Hawai'i Supernova Flows: A Peculiar Velocity Survey Using Over a Thousand Supernovae in the Near-Infrared
• BayeSN and SALT: A Comparison of Dust Inference Across SN Ia Light-curve Models with DES5YR
• The DEHVILS in the Details: Type Ia Supernova Hubble Residual Comparisons and Mass Step Analysis in the Near-Infrared