PT Journal
AU Coutant, A
   Fabbri, A
   Parentani, R
   Balbinot, R
   Anderson, PR
TI Hawking radiation of massive modes and undulations
SO Physical Review D
JI Phys. Rev. D
PY 2012
BP 064022
EP 17pp
VL 86
IS 6
DI 10.1103/PhysRevD.86.064022
LA English
AB We compute the analogue Hawking radiation for modes which possess a small wave vector perpendicular to the horizon. For low frequencies, the resulting mass term induces a total reflection. This reflection is accompanied by an extra mode mixing which occurs in the supersonic region, and which cancels out the infrared divergence of the near horizon spectrum. As a result, the amplitude of the undulation (0-frequency wave with macroscopic amplitude) emitted in white hole flows now saturates at the linear level, unlike what is found in the massless case. In addition, we point out that the mass introduces a new type of undulation which is produced in black hole flows, and which is well described in the hydrodynamical regime.
ER