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Gravitational Waves from Stellar Collapse: Correlations to Explosion Asymmetries | | Chris L. Fryer
; Daniel E. Holz
; Scott A. Hughes
; | | Date: |
8 Mar 2004 | | Journal: | Astrophys.J. 609 (2004) 288-300 | | Subject: | astro-ph gr-qc | | Abstract: | The collapse of massive stars not only produces observable outbursts across the entire electromagnetic spectrum but, for Galactic (or near-Galactic) supernovae, detectable signals for ground-based neutrino and gravitational wave detectors. Gravitational waves and neutrinos provide the only means to study the actual engine behind the optical outbursts: the collapsed stellar core. While the neutrinos are most sensitive to details of the equation of state, gravitational waves provide a means to study the mass asymmetries in this central core. We present gravitational wave signals from a series of 3-dimensional core-collapse simulations with asymmetries derived from initial perturbations caused by pre-collapse convection, core rotation, and low-mode convection in the explosion engine itself. A Galactic supernovae will allow us to differentiate these different sources of asymmetry. Combining this signal with other observations of the supernova, from neutrinos to gamma-rays to the compact remnant, dramatically increases the predictive power of the gravitational wave signal. We conclude with a discussion of the gravitational wave signal arising from collapsars, the leading engine for long-duration gamma-ray bursts. | | Source: | arXiv, astro-ph/0403188 | | Services: | Forum | Review | PDF | Favorites | |
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