Projected Cosmological Constraints from Strongly Lensed Supernovae with the Roman Space Telescope

Understand

One of the primary mission objectives for the Roman Space Telescope is to investigate the nature of dark energy with a variety of methods.

• Observations of Type Ia supernovae (SNIa) will be one of the principal anchors of the Roman cosmology program, through traditional luminosity distance measurements.
• This SNIa cosmology program can provide another valuable cosmological probe, without altering the mission strategy: time delay cosmography with gravitationally lensed SN.
• In this work, we forecast lensed SN cosmology constraints with the Roman Space Telescope, while providing useful tools for future work.