Massive Black Hole Binary Inspirals: Results from the LISA Parameter Estimation Taskforce - General Relativity and Quantum CosmologyReportar como inadecuado




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Abstract: The LISA Parameter Estimation LISAPE Taskforce was formed in September 2007to provide the LISA Project with vetted codes, source distribution models, andresults related to parameter estimation. The Taskforce-s goal is to be able toquickly calculate the impact of any mission design changes on LISA-s sciencecapabilities, based on reasonable estimates of the distribution ofastrophysical sources in the universe. This paper describes our Taskforce-swork on massive black-hole binaries MBHBs. Given present uncertainties in theformation history of MBHBs, we adopt four different population models, based oni whether the initial black-hole seeds are small or large, and ii whetheraccretion is efficient or inefficient at spinning up the holes. We compare fourlargely independent codes for calculating LISA-s parameter-estimationcapabilities. All codes are based on the Fisher-matrix approximation, but inthe past they used somewhat different signal models, source parametrizationsand noise curves. We show that once these differences are removed, the fourcodes give results in extremely close agreement with each other. Using a codethat includes both spin precession and higher harmonics in thegravitational-wave signal, we carry out Monte Carlo simulations and determinethe number of events that can be detected and accurately localized in our fourpopulation models.



Autor: K. G. Arun, Stas Babak, Emanuele Berti, Neil Cornish, Curt Cutler, Jonathan Gair, Scott A. Hughes, Bala R. Iyer, Ryan N. Lang, Il

Fuente: https://arxiv.org/







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