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We revisit the recently found equivalence for the response of a static scalarsource interacting with a {\em massless} Klein-Gordon field when the source is(i) static in Schwarzschild spacetime, in the Unruh vacuum associated with theHawking radiation and (ii) uniformly accelerated in Minkowski spacetime, in theinertial vacuum, provided that the source's proper acceleration is the same inboth cases. It is shown that this equivalence is broken when the masslessKlein-Gordon field is replaced by a {\em massive} one.Comment: 4 pages, 2 figure

Do static sources respond to massive scalar particles from the Hawking radiation as uniformly accelerated ones do in the inertial vacuum?