Journal
PHYSICAL REVIEW D
Volume 86, Issue 4, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.86.044023
Keywords
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Funding
- Sherman Fairchild Foundation
- National Science Foundation [PHY-0904015]
- NSF MRI Award [PHY-0960291]
- NSF Teragrid [TG-PHY100033]
- Louisiana Optical Network Initiative [loni_numrel07]
- National Energy Research Scientific Computing Center (NERSC)
- Office of Science of the U. S. Department of Energy [DE-AC02-05CH11231]
- U.K. Science and Technology Facilities Council
- Scottish Universities Physics Alliance (SUPA)
- Science and Technology Facilities Council [Gravitational Waves, ST/K502236/1, PP/F001118/1, ST/I001085/1, ST/J000361/1] Funding Source: researchfish
- STFC [ST/K502236/1, ST/I001085/1, PP/F001118/1, ST/J000361/1, Gravitational Waves] Funding Source: UKRI
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Stellar collapse and the subsequent development of a core-collapse supernova explosion emit bursts of gravitational waves (GWs) that might be detected by the advanced generation of laser interferometer gravitational-wave observatories such as Advanced LIGO, Advanced Virgo, and LCGT. GW bursts from core-collapse supernovae encode information on the intricate multidimensional dynamics at work at the core of a dying massive star and may provide direct evidence for the yet uncertain mechanism driving supernovae in massive stars. Recent multidimensional simulations of core-collapse supernovae exploding via the neutrino, magnetorotational, and acoustic explosion mechanisms have predicted GW signals which have distinct structure in both the time and frequency domains. Motivated by this, we describe a promising method for determining the most likely explosion mechanism underlying a hypothetical GW signal, based on principal component analysis and Bayesian model selection. Using simulated Advanced LIGO noise and assuming a single detector and linear waveform polarization for simplicity, we demonstrate that our method can distinguish magnetorotational explosions throughout the Milky Way (D less than or similar to 10 kpc) and explosions driven by the neutrino and acoustic mechanisms to D less than or similar to 2 kpc. Furthermore, we show that we can differentiate between models for rotating accretion-induced collapse of massive white dwarfs and models of rotating iron core collapse with high reliability out to several kpc.
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