The Host-Galaxy Dispersion Contribution Inferred from Localised Bursts
Year: 2026
Type: article
Abstract: This paper subtracts modelled Galactic and computed intergalactic contributions from the dispersion measures of seven localised fast radio bursts with known redshifts, deriving the host-galaxy contribution for each under one uniform convention and characterising the resulting distribution and its consequences for dispersion-based distances. The headline results are as follows. Median observer-frame host dispersion of the sample: 121 pc cm-3; Median rest-frame host dispersion of the sample: 125 pc cm-3; Largest observer-frame host dispersion in the sample: 324 pc cm-3; Smallest observer-frame host dispersion in the sample: 42.9 pc cm-3; Intergalactic dispersion predicted at the sample median redshift: 251 pc cm-3; Host dispersion of the repeater FRB 180916 in its rest frame: 125 pc cm-3. All values are computed from the stated assumptions and published inputs; the study is simulated and computed, not measured.
Author: Aldred, William Alexander
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225806878
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