Abstract
Abstract We present optical and near-infrared (NIR, Y-, J-, H-band) observations of 42 Type Ia supernovae (SNe Ia) discovered by the untargeted intermediate Palomar Transient Factory survey. This new data set covers a broad range of redshifts and host galaxy stellar masses, compared to previous SN Ia efforts in the NIR. We construct a sample, using also literature data at optical and NIR wavelengths, to examine claimed correlations between the host stellar masses and the Hubble diagram residuals. The SN magnitudes are corrected for host galaxy extinction using either a global total-to-selective extinction ratio, R V = 2.0, for all SNe, or a best-fit R V for each SN individually. Unlike previous studies that were based on a narrower range in host stellar mass, we do not find evidence for a “mass step,” between the color- and stretch-corrected peak J and H magnitudes for galaxies below and above log ( M * / M ⊙ ) = 10 . However, the mass step remains significant (3σ) at optical wavelengths (g, r, i) when using a global R V , but vanishes when each SN is corrected using their individual best-fit R V . Our study confirms the benefits of the NIR SN Ia distance estimates, as these are largely exempted from the empirical corrections dominating the systematic uncertainties in the optical.
Highlights
Since the initial standardization of Type Ia supernova (SN Ia) peak luminosities was employed in the discovery of the accelerated expansion of the Universe
Similar to conclusions reached in previous studies (Sullivan et al 2011; Childress et al 2013), we find that low-mass galaxies tend to host SNe with higher stretch with moderate extinction (E(B − V )host
The underlying cause of these correlations is not completely understood, with some suggestions that this could be due to correlation with age/metallicity of the underlying stellar population, there is evidence pointing to this correlation arising from differences in dust properties of the SN hosts
Summary
Since the initial standardization of Type Ia supernova (SN Ia) peak luminosities was employed in the discovery of the accelerated expansion of the Universe One such term accounts for the dependence of the SN Ia luminosity on its host galaxy properties, e.g. stellar mass (Hamuy et al 1995; Sullivan et al 2003; Lampeitl et al 2010; Childress et al 2013; Betoule et al 2014; Uddin et al 2017; Scolnic et al 2018; Wiseman et al 2020; Kelsey et al 2021) These studies all uncover, to various degrees of significance, a “mass step” in the data: after light-curve standardisation, SNe in high-mass galaxies are more luminous than those exploding in low-mass galaxies.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
