English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Zendy Pro

Presents the zaia usage as premium feature

ZAIA

Presents AI Discovery search usage as a premium feature

AI Discovery

Presents AI Discovery explain and summary usage as a premium feature

Content Analysis

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Presents the pdf analysis as premium feature

PDF Analysis

1500 Top-up

3000 Top-up

Zendy Basic

2500 Top-up

Zendy Unlimited

Presents the access of premium content as premium feature

Premium Content

More luminous Type Ia supernovae (SNe Ia) prefer less massive hosts andregions of higher star formation. This correlation is inverted duringwidth-color-luminosity light curve standardization resulting in step-likebiases of distance measurements with respect to host properties. Using thePISCO supernova host sample and SDSS, GALEX, and 2MASS photometry, we comparehost stellar mass and specific star formation rate (sSFR) from differentobservation methods, including local vs. global, and fitting techniques tomeasure their impact on the host step biases. Mass step measurements for allour mass samples are consistent within a 1$\sigma$ significance from-0.03$\pm$0.02 mag to -0.04$\pm$0.02 mag. Including or excluding UV informationhad no effect on measured mass step size or location. Specific SFR (sSFR) stepsizes are more significant than mass step measurements and varied from$0.05\pm0.03$ mag (H$\alpha$) and $0.06\pm0.02$ mag (UV) for a 51 host sample.The sSFR step location is influenced by mass sample used to normalize starformation and by sSFR tracer choice. The step size is reduced to 0.04$\pm$0.03mag when using all available 73 hosts with H$\alpha$ measurements. This 73PISCO host subsample overall lacked a clear step signal, but here we aresearching for whether different choices of mass or sSFR estimation can create astep signal. We find no evidence that different observation or fittingtechniques choice can create a distance measurement step in either mass orsSFR.

The Dependence of the Type Ia Supernova Host Bias on Observation or Fitting Technique