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Record 1 of 28053
Modeling Gravitational Radiation Waveforms from Black Hole Mergers
Author and Affiliation:
Baker, J. G.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Centrelia, J. M.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Choi, D.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Koppitz, M.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
VanMeter, J.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Gravitational radiation from merging binary black hole systems is anticipated as a key source for gravitational wave observations. Ground-based instruments, such as the Laser Interferometer Gravitational-wave Observatory (LIGO) may observe mergers of stellar-scale black holes, while the space-based Laser Interferometer Space Antenna (LISA) observatory will be sensitive to mergers of massive galactic-center black holes over a broad range of mass scales. These cataclysmic events may emit an enormous amount of energy in a brief time. Gravitational waves from comparable mass mergers carry away a few percent of the system's mass-energy in just a few wave cycles, with peak gravitational wave luminosities on the order of 10^23 L_Sun. Optimal analysis and interpretation of merger observation data will depend on developing a detailed understanding, based on general relativistic modeling, of the radiation waveforms. We discuss recent progress in modeling radiation from equal mass mergers using numerical simulations of Einstein's gravitational field equations, known as numerical relativity. Our simulations utilize Adaptive Mesh Refinement (AMR) to allow high-resolution near the black holes while simultaneously keeping the outer boundary of the computational domain far from the black holes, and making it possible to read out gravitational radiation waveforms in the weak-field wave zone. We discuss the results from simulations beginning with the black holes orbiting near the system's innermost stable orbit, comparing the recent simulations with earlier "Lazarus" waveform estimates based on an approximate hybrid numerical/perturbative technique.
Publication Date: Jan 01, 2006
Document ID:
20060013068
(Acquired May 16, 2006)
Subject Category: ASTRONOMY
Document Type: Conference Paper
Meeting Information: American Astronomical Society Meeting; 8-12 Jan. 2006; Washington, DC; United States
Financial Sponsor: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Organization Source: NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: BLACK HOLES (ASTRONOMY); GRAVITATIONAL WAVES; WAVEFORMS; MODELS; SIMULATION; CATACLYSMIC VARIABLES; HIGH RESOLUTION; GRID REFINEMENT (MATHEMATICS); LIGO (OBSERVATORY)
Availability Source: Other Sources
Availability Notes: Abstract Only
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