Two Advances in Modeling Black Hole Coalescence

• Analytic Waveform
• Buonnano and Damour, (PRD62, 2000).
• Uses Padé approximants to resum asymptotic series in a divergent limit.
• No consensus on accuracy of waveforms.
• Example is here.
• Numerical Waveform
• Campanelli, Lousto and collaborators (PRL87, 2002).
• Solve Einstein field equations numerically.
• Contain unquantified uncertainties in initial conditions.
• Example is here.
• Comparisons
• Comparison of waveforms.
• Comparison of reassigned spectragrams.