Cosmological Inference from Host-Selected Type Ia Supernova Samples

Abstract

We compare two Type Ia supernova (SN Ia) samples that are drawn from a spectroscopically confirmed SN Ia sample: a host-selected sample in which SNe Ia are restricted to those that have a spectroscopic redshift from the host; and a broader, more traditional sample in which the redshift could come from either the SN or the host. The host-selected sample is representative of SN samples that will use the redshift of the host to infer the SN redshift, long after the SN has faded from view. We find that SNe Ia that are selected on the availability of a redshift from the host differ from SNe Ia that are from the broader sample. The former tend to be redder, have narrower light curves, live in more massive hosts, and tend to be at lower redshifts. We find that constraints on the equation of state of dark energy, $w$, and the matter density, ${\Omega }_M$, remain consistent between these two types of samples. Our results are important for ongoing and future supernova surveys, which unlike previous supernova surveys, will have limited real-time follow-up to spectroscopically classify the SNe they discover. Most of the redshifts in these surveys will come from the hosts.

Accepted for publication in PASA

References in corpus (28)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• emcee: The MCMC Hammer
• Dark Energy and the Accelerating Universe
• New Hubble Space Telescope Discoveries of Type Ia Supernovae at z > 1: Narrowing Constraints on the Early Behavior of Dark Energy
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• Improved Distances to Type Ia Supernovae with Multicolor Light Curve Shapes: MLCS2k2
• BVRI Light Curves for 22 Type Ia Supernovae
• CfA3: 185 Type Ia Supernova Light Curves from the CfA
• Two populations of progenitors for type Ia SNe?
• The Carnegie Supernova Project: First Photometry Data Release of Low-Redshift Type Ia Supernovae
• The Carnegie Supernova Project: The Low-Redshift Survey
• The Carnegie Supernova Project: Second Photometry Data Release of Low-Redshift Type Ia Supernovae
• CfA4: Light Curves for 94 Type Ia Supernovae
• Gemini Spectroscopy of Supernovae from SNLS: Improving High Redshift SN Selection and Classification
• The Sloan Digital Sky Survey-II: Photometry and Supernova Ia Light Curves from the 2005 data
• Host Galaxy Properties and Hubble Residuals of Type Ia Supernovae from the Nearby Supernova Factory
• Supernova Simulations and Strategies For the Dark Energy Survey
• Photometric SN Ia Candidates from the Three-Year SDSS-II SN Survey Data
• Verifying the Cosmological Utility of Type Ia Supernovae: Implications of a Dispersion in the Ultraviolet Spectra
• Cosmology with Photometrically-Classified Type Ia Supernovae from the SDSS-II Supernova Survey
• OzDES multi-fibre spectroscopy for the Dark Energy Survey: first-year operation and results
• Host Galaxy Identification for Supernova Surveys
• Cosmological Parameter Uncertainties from SALT-II Type Ia Supernova Light Curve Models
• First-Year Spectroscopy for the SDSS-II Supernova Survey
• Supernova Legacy Survey: Using Spectral Signatures To Improve Type Ia Supernovae As Distance Indicators
• Distances with <4% Precision from Type Ia Supernovae in Young Star-Forming Environments
• An Efficient Approach to Obtaining Large Numbers of Distant Supernova Host Galaxy Redshifts

Cited by in corpus (6)

• The Carnegie Supernova Project-I: Correlation Between Type Ia Supernovae and Their Host Galaxies from Optical to Near-Infrared Bands
• The influence of Host Galaxies in Type Ia Supernova Cosmology
• Using Host Galaxy Spectroscopy to Explore Systematics in the Standardisation of Type Ia Supernovae
• Photometric Supernovae Redshift Systematics Requirements
• [O II] as an Effective Indicator of the Dependence Between the Standardised Luminosities of Type Ia Supernovae and the Properties of their Host Galaxies
• An Exploration of Heterogeneity in Supernova Type Ia Samples