FLIMFLAM DR1: The First Constraints on the Cosmic Baryon Distribution from 8 FRB sightlines

Understand

The dispersion measure of fast radio bursts (FRBs), arising from the interactions of the pulses with free electrons along the propagation path, constitutes a unique probe of the cosmic baryon distribution.

• Their constraining power is further enhanced in combination with observations of the foreground large-scale structure and intervening galaxies.
• In this work, we present the first constraints on the partition of the cosmic baryons between the intergalactic medium (IGM) and circumgalactic medium (CGM), inferred from the FLIMFLAM spectroscopic survey.
• In its first data release, the FLIMFLAM survey targeted galaxies in the foreground of 8 localized FRBs.