einladung - Fakultät für Physik

Fakultät für Physik
Gravitationsphysik
A-1090 WIEN, BOLTZMANNGASSE 5, AUSTRIA
EINLADUNG
Im Rahmen des Literaturseminars
zum Vortrag
von
Michael Pürrer
(MPI Golm)
über
“Estimating source parameters of GW150914:
The role of waveform models and numerical relativity
simulations”
Abstract:
On September 14, 2015, the Laser Interferometer Gravitational-wave Observatory
(LIGO) detected a gravitational-wave (GW) transient (GW150914). We characterise
the properties of the source and its parameters with Bayesian parameter estimation
algorithms using waveform models that describe GWs emitted from binary black holes
in general relativity. In addition, we compare these models against a set of numerical
relativity (NR) waveforms in the vicinity of GW150914. Simplifications are used in the
construction of some waveform models, such as restriction to spins aligned with the
orbital angular momentum, no inclusion of higher harmonics in the GW radiation, no
modeling of eccentricity and the use of effective parameters to describe spin precession.
In contrast, NR waveforms provide us with a high fidelity representation of the "true"
waveform modulo small numerical errors. We discuss where in the parameter space
the above modeling assumptions lead to noticeable biases in recovered parameters.
Zeit: Donnerstag, 12.5.2016, 14.00
Ort: Arbeitsgruppe Gravitation, Währinger Straße 17,
Seminarraum A, 2. Stock
gez.: H. Rumpf

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