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In previous work, we established theoretical results concerning the effect ofmatter shells surrounding a gravitational wave (GW) source, and we now applythese results to astrophysical scenarios. Firstly, it is shown that GW echoesthat are claimed to be present in LIGO data of certain events, could not havebeen caused by a matter shell. However, it is also shown that there arescenarios in which matter shells could make modifications of order a fewpercent to a GW signal; these scenarios include binary black hole mergers,binary neutron star mergers, and core collapse supernovae.

Modifications to the signal from a gravitational wave event due to a surrounding shell of matter