Early Advanced LIGO binary neutron-star sky localization and parameter estimation

[摘要] 2015 will see the first observations of Advanced LIGO and the start of the gravitational-wave (GW) advanced-detector era. One of the most promising sources for ground- based GW detectors are binary neutron-star (BNS) coalescences. In order to use any detections for astrophysics, we must understand the capabilities of our parameter-estimation analysis. By simulating the GWs from an astrophysically motivated population of BNSs, we examine the accuracy of parameter inferences in the early advanced-detector era. We find that sky location, which is important for electromagnetic follow-up, can be determined rapidly (∼ 5 s), but that sky areas may be hundreds of square degrees. The degeneracy between component mass and spin means there is significant uncertainty for measurements of the individual masses and spins; however, the chirp mass is well measured (typically better than 0.1%).

[发布机构] School of Physics and Astronomy, University of Birmingham, Birmingham; B15 2TT, United Kingdom^1;Enrico Fermi Institute, University of Chicago, Chicago; IL; 60637, United States^2;Astrophysics Science Division, NASA Goddard Space Flight Center, Greenbelt; MD; 20771, United States^3;Leonard E. Parker Center for Gravitation, Cosmology and Astrophysics, University of Wisconsin-Milwaukee, Milwaukee; WI; 53201, United States^4;Massachusetts Institute of Technology, 185 Albany St, Cambridge; MA; 02139, United States^5;Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto; ON; M5S 3H8, Canada^6;Department of Physics, University of Maryland-College Park, College Park; MD; 20742, United States^7;Gravitational Astrophysics Lab, NASA Goddard Space Flight Center, Greenbelt; MD; 20771, United States^8;Perimeter Institute for Theoretical Physics, Ontario; N2L 2Y5, Canada; (10) Pennsylvania State University, University Park; PA; 16802, United States; (11) Syracuse University, Syracuse; NY; 13244, United States; (12) LIGO Laboratory, California Institute of Technology, Pasadena; CA; 91125, United States^9

[关键词] Accuracy of parameters;Advanced detector;Binary neutron stars;Follow up;Ground based;GW detectors;Measurements of