Roman CCS White Paper: Tracing stellar mass assembly and emerging quiescence at cosmic noon -- the case for deep imaging with all of Roman's wide filters in the HLTDS

TL;DR

This paper advocates for comprehensive filter coverage in the Roman Space Telescope's HLTDS to enhance extragalactic science and improve supernova cosmology by capturing a broad wavelength range.

Contribution

It proposes including all wide filters except F146 in the Roman HLTDS to maximize scientific return in galaxy evolution and supernova studies.

Findings

Enhanced ability to trace stellar mass assembly.

Improved supernova cosmology systematics.

Broader wavelength coverage benefits deep field science.

Abstract

We present arguments for including observations with all of the Wide Field Instrument imaging filters, with the exception of F146, within the Nancy Grace Roman Space Telescope (\emph{Roman}) High Latitude Time Domain Survey (HLTDS). Our case is largely driven by the extragalactic deep field science that can be accomplished with HLTDS observations and also by the improvements in type Ia supernova (SN Ia) cosmology systematics that a wide wavelength coverage affords.