Cosmological Inference from Host-Selected Type Ia Supernova Samples

Uddin, S. A.; Mould, Jeremy; Lidman, C.; Ruhlmann-Kleider, V.; Hardin, D.

doi:10.1017/pasa.2017.2

Cited by 7 publications

(6 citation statements)

References 44 publications

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“…Some of these studies find that certain subgroups of SNe Ia can be better standard candles based on their host properties (e.g., Rigault et al 2013, Kelly et al 2015, Uddin et al 2017b. Moreover, Uddin et al (2017a) confirmed there is no bias in cosmological constraints derived from subsamples selected by host properties.…”

Section: Introductionmentioning

confidence: 85%

The Carnegie Supernova Project-I: Correlation between Type Ia Supernovae and Their Host Galaxies from Optical to Near-infrared Bands*

Uddin

Burns

Phillips

et al. 2020

ApJ

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We present optical and near-infrared (ugriY JH) photometry of host galaxies of Type Ia supernovae (SN Ia) observed by the Carnegie Supernova Project-I. We determine host galaxy stellar masses and, for the first time, study their correlation with SN Ia standardized luminosity across optical and nearinfrared (uBgV riY JH) bands. In the individual bands, we find that SNe Ia are more luminous in more massive hosts with luminosity offsets ranging between −0.07±0.03 mag to −0.15±0.04 mag after lightcurve standardization. The slope of the SN Ia Hubble residual-host mass relation is negative across all uBgV riY JH bands with values ranging between −0.036±0.025 mag/dex to −0.097±0.027 mag/deximplying that SNe Ia in more massive galaxies are brighter than expected. The near-constant observed correlations across optical and near-infrared bands indicate that dust may not play a significant role in the observed luminosity offset-host mass correlation. We measure projected separations between SNe Ia and their host centers, and find that SNe Ia that explode beyond a projected 10 kpc have a 30% to 50% reduction of the dispersion in Hubble residuals across all bands -making them a more uniform subset of SNe Ia. Dust in host galaxies, peculiar velocities of nearby SN Ia, or a combination of both may drive this result as the color excesses of SNe Ia beyond 10 kpc are found to be generally lower than those interior, but there is also a diminishing trend of the dispersion as we exclude nearby events. We do not find that SN Ia average luminosity varies significantly when they are grouped in various host morphological types. Host galaxy data from this work will be useful, in conjunction with future high-redshift samples, in constraining cosmological parameters.

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Section: Introductionmentioning

confidence: 85%

The Carnegie Supernova Project-I: Correlation between Type Ia Supernovae and Their Host Galaxies from Optical to Near-infrared Bands*

Uddin

Burns

Phillips

et al. 2020

ApJ

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“…It may eventually lead to tighter constraints on the properties of dark energy. We discuss cosmological constraints from a DES-like SNe Ia sample in a separate paper (Uddin et al 2017).…”

Section: Discussionmentioning

confidence: 99%

“…The subsets that we fit are listed in Table 3. We first describe the cosmology fitting method following Uddin et al (2017) and B14. Thereafter we present our results.…”

Section: Shifts In Cosmological Parametersmentioning

confidence: 99%

The Influence of Host Galaxies in Type Ia Supernova Cosmology

Uddin

Mould

Lidman

et al. 2017

ApJ

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We use a sample of 1338 spectroscopically confirmed and photometrically classified Type Ia Supernovae (SNe Ia), sourced from the CSP, CfA, SDSS-II, and SNLS supernova samples, to examine the relationships between SNe Ia and the galaxies that host them. Our results provide confirmation with improved statistical significance that SNe Ia, after standardization, are on average more luminous in massive hosts (significance > 5σ), and decline more rapidly in massive hosts (significance > 9σ) and in hosts with low specific star formation rates (significance > 8σ). We study the variation of these relationships with redshift and detect no evolution. We split SNe Ia into pairs of subsets that are based on the properties of the hosts, and fit cosmological models to each subset. Including both systematic and statistical uncertainties, we do not find any significant shift in the best-fit cosmological parameters between the subsets. Among different SN Ia subsets, we find that SNe Ia in hosts with high specific star formation rates have the least intrinsic scatter (σ int = 0.08 ± 0.01) in luminosity after standardization.

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“…The most commonly used correction is with the stellar mass of the host galaxy. The correction is applied as a step function around 10 10 M , and is referred to in the literature as the "mass step" where SNe Ia in high mass galaxies (> 10 10 M ) are more luminous after correction than SNe Ia in low mass galaxies (Kelly et al 2010;Sullivan et al 2010;Guy et al 2010;Childress et al 2013;Uddin et al 2017;Smith et al 2020b;Kelsey et al 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Instead of deriving host galaxy properties from broad band photometry as most studies have done (e.g. Sullivan et al 2010;Rigault et al 2013;Uddin et al 2017;Rose et al 2019;Smith et al 2020b;Kelsey et al 2021;Johansson et al 2021), we use spectra. Spectra offer the possibility of capturing trends that cannot be extracted using photometry.…”

Section: Introductionmentioning

confidence: 99%

Using host galaxy spectroscopy to explore systematics in the standardization of Type Ia supernovae

Dixon

Lidman

Mould

et al. 2022

Monthly Notices of the Royal Astronomical Society

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We use stacked spectra of the host galaxies of photometrically identified type Ia supernovae (SNe Ia) from the Dark Energy Survey (DES) to search for correlations between Hubble diagram residuals and the spectral properties of the host galaxies. Utilising full spectrum fitting techniques on stacked spectra binned by Hubble residual, we find no evidence for trends between Hubble residuals and properties of the host galaxies that rely on spectral absorption features (<1.3σ), such as stellar population age, metallicity, and mass-to-light ratio. However, we find significant trends between the Hubble residuals and the strengths of [OII] (4.4σ) and the Balmer emission lines (3σ). These trends are weaker than the well known trend between Hubble residuals and host galaxy stellar mass (7.2σ) that is derived from broad band photometry. After light curve corrections, we see fainter SNe Ia residing in galaxies with larger line strengths. We also find a trend (3σ) between Hubble residual and the Balmer decrement (a measure of reddening by dust) using Hβ and Hγ. The trend, quantified by correlation coefficients, is slightly more significant in the redder SNe Ia, suggesting that bluer SNe Ia are relatively unaffected by dust in the interstellar medium of the host and that dust contributes to current Hubble diagram scatter impacting the measurement of cosmological parameters.

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Cosmological Inference from Host-Selected Type Ia Supernova Samples

Cited by 7 publications

References 44 publications

The Carnegie Supernova Project-I: Correlation between Type Ia Supernovae and Their Host Galaxies from Optical to Near-infrared Bands*

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 standardization of Type Ia supernovae

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