Description
Long gamma-ray bursts (GRBs) serve as powerful tools for probing the properties of distant galaxies. Their luminous afterglows pinpoint galaxies independent of their intrinsic luminosity. However, this selection method is subject to biases based on the properties of the progenitor stars linked to each host galaxy. Characterising the galaxy populations traced by GRBs is therefore important both to effectively use GRBs as probes as well as to place stronger constraints on the progenitor stars capable of forming long GRBs. Spatially-resolved spectroscopic observations with integral field units (IFUs) provide valuable insights into the interstellar medium and stellar populations of GRB host galaxies. While numerous spatially resolved spectroscopic studies have been conducted for GRB hosts in the local universe (z<1), such observations remain relatively scarce at high redshifts (z>2). In this work, we present results of the first two GRB host galaxies observed with the JWST/NIRSpec IFU with a spatial resolution of ~ 1.6 kpc; the hosts of GRB 150403A and GRB 050820A at redshifts z ~ 2.06 and z ~ 2.61, respectively.
