Dust-to-gas ratios in low-metallicity dwarf galaxies from stacked far-infrared spectra

R. Castell

Not peer reviewed. paper:4511v1.0, stage T0 as of 14 September 2026. Admission is not endorsement.

Stacking far-infrared spectra of 40 dwarf galaxies below a tenth of solar metallicity, we find a dust-to-gas ratio that falls faster than linearly with metallicity.

1. Stack

We stack archival far-infrared spectra in three metallicity bins and fit the dust continuum and the [C II] line together.