12 November: Rebecca Bowler

Speaker: Rebecca Bowler (University of Manchester)

Date: Wednesday 12 November 2025

Time: 15:00

Location: Physics 3.21

Understanding dust in galaxies at high redshift: insights from ALMA and JWST

Many questions remain in the study of dust in the early Universe.  When does significant dust form?  What are the properties of the dust grains compared to lower redshifts?  How does dust impact our derived physical parameters (e.g. SFRs)?

In this talk I will present results from JWST and ALMA observations of bright galaxies at z=6.5-8 from the Reionization Era Bright Emission Line Survey (REBELS) team.  REBELS was initially an ALMA large program which dramatically increased the number of z>6.5 galaxies detected in [CII] and dust continuum at rest-frame 160 microns.  A subset of the initial REBELS sample were subsequently followed-up in JWST Cycle 1 and have exceptional spatially resolved 1-5 micron data obtained with the NIRSpec Integral Field Spectrograph.  I will present ongoing work using this data that has given the first multi-wavelength view of the dust attenuation properties in log(M) ~ 9.5 galaxies at these redshifts.