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We present the gravitational waveforms computed in ab initio two-dimensionalcore collapse supernova models evolved with the Chimera code for progenitormasses between 12 and 25 solar masses. All models employ multi-frequencyneutrino transport in the ray-by-ray approximation, state-of-the-art weakinteraction physics, relativistic transport corrections such as thegravitational redshift of neutrinos, two-dimensional hydrodynamics with thecommensurate relativistic corrections, Newtonian self-gravity with a generalrelativistic monopole correction, and the Lattimer-Swesty equation of statewith 220 MeV compressibility, and begin with the most recent Woosley-Hegernonrotating progenitors in this mass range. All of our models exhibit robustexplosions. Therefore, our waveforms capture all stages of supernovadevelopment: 1) a relatively short and weak prompt signal, 2) a quiescentstage, 3) a strong signal due to convection and SASI activity, 4) terminationof active accretion onto the proto-neutron star, and 5) a slowly increasingtail that reaches a saturation value. Fourier decomposition shows that thegravitational wave signals we predict should be observable by AdvLIGO forGalactic events across the range of progenitors considered here. Thefundamental limitation of these models is in their imposition of axisymmetry.Further progress will require counterpart three-dimensional models, which areunderway.

Gravitational Wave Signatures of Ab Initio Two-Dimensional Core Collapse Supernova Explosion Models for 12-25 Solar Masses Stars