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Concerning Colour: The Effect of Environment on Type Ia Supernova Colour in the Dark Energy Survey
L. Kelsey, M. Sullivan, P. Wiseman +67
Recent analyses have found intriguing correlations between the colour () of type Ia supernovae (SNe Ia) and the size of their 'mass-step', the relationship between SN Ia host ga…
A galaxy-driven model of type Ia supernova luminosity variations
P. Wiseman, M. Vincenzi, M. Sullivan +59
Type Ia supernovae (SNe Ia) are used as standardisable candles to measure cosmological distances, but differences remain in their corrected luminosities which display a magnitude s…
Evaluating and Optimizing a Slitless Prism for Nancy Grace Roman Space Telescope SN Cosmology
David Rubin, Greg Aldering, Tri L. Astraatmadja +9
This work presents a set of studies addressing the use of the low-dispersion slitless prism on Roman for SN spectroscopy as part of the Roman High Latitude Time Domain Survey (HLTD…
The Dark Energy Survey Supernova Program results: Type Ia Supernova brightness correlates with host galaxy dust
Cole Meldorf, Antonella Palmese, Dillon Brout +68
Cosmological analyses with type Ia supernovae (SNe Ia) often assume a single empirical relation between color and luminosity () and do not account for varying host-galaxy dust p…
High-Precision Redshifts for Type Ia Supernovae with the Nancy Grace Roman Space Telescope P127 Prism
Bhavin A. Joshi, Louis-Gregory Strolger, Russell E. Ryan +7
We present results from simulating slitless spectroscopic observations with the Nancy Grace Roman Space Telescope's (Roman) Wide-Field Instrument (WFI) P127 prism spanning 0.75 $μm…
A Synthetic Roman Space Telescope High-Latitude Time-Domain Survey: Supernovae in the Deep Field
Kevin X. Wang, Dan Scolnic, M. A. Troxel +14
NASA will launch the Nancy Grace Roman Space Telescope (Roman) in the second half of this decade, which will allow for a generation-defining measurement of dark energy through mult…