Erratum: Dispersion of gravitational waves in cold spherical interstellar medium

TL;DR

This paper corrects numerical errors in a previous study on gravitational wave dispersion in the interstellar medium, clarifying the frequency-shift calculations and ensuring consistency with earlier research.

Contribution

It provides corrected numerical results and methodological clarifications for gravitational wave dispersion analysis in interstellar space.

Findings

Corrected frequency-shift calculations for GW150914

Adjusted metric functions using Darmois--Israel junction conditions

Ensured consistency with earlier related studies

Abstract

The study published in IJMPD 27(4):1850040, 2018 provided a numerical result for the frequency-shift of GWs due to dispersion in interstellar medium. In order to adjust the metric functions of the originally improperly matched `background' spacetime in sections 2.1, the authors have adopted Darmois--Israel junction conditions. In section 4.1 the code used in the original paper erroneously computed the magnitude of frequency-shift for the transient event GW150914 due to a missing conversion factor. In both cases where numerical errors and potential contradictions have been identified and eliminated, adjustments were undertaken in order to maintain consistency with closely-related earlier studies.