Parameter Estimation on Gravitational Waves from Neutronstar Binaries with Spinning Components
Abstract
Inspiraling binary neutron stars (BNSs) are expected to be one of the most significant sources of gravitationalwave signals for the new generation of advanced groundbased detectors. We investigate how well we could hope to measure properties of these binaries using the Advanced LIGO detectors, which began operation in September 2015. We study an astrophysically motivated population of sources (binary components with masses 1.2\quad {M}_{☉ }{}1.6\quad {M}_{☉ } and spins of less than 0.05) using the full LIGO analysis pipeline. While this simulated population covers the observed range of potential BNS sources, we do not exclude the possibility of sources with parameters outside these ranges; given the existing uncertainty in distributions of mass and spin, it is critical that analyses account for the full range of possible mass and spin configurations. We find that conservative prior assumptions on neutronstar mass and spin lead to average fractional uncertainties in component masses of ∼16%, with little constraint on spins (the median 90% upper limit on the spin of the more massive component is ∼0.7). Stronger prior constraints on neutronstar spins can further constrain mass estimates but only marginally. However, we find that the sky position and luminosity distance for these sources are not influenced by the inclusion of spin; therefore, if LIGO detects a lowspin population of BNS sources, less computationally expensive results calculated neglecting spin will be sufficient for guiding electromagnetic followup.
 Publication:

The Astrophysical Journal
 Pub Date:
 July 2016
 DOI:
 10.3847/0004637X/825/2/116
 arXiv:
 arXiv:1508.05336
 Bibcode:
 2016ApJ...825..116F
 Keywords:

 gravitational waves;
 methods: data analysis;
 stars: neutron;
 surveys;
 Astrophysics  High Energy Astrophysical Phenomena;
 General Relativity and Quantum Cosmology
 EPrint:
 10 pages, 9 figures