Numerical simulation of sky localization for LISA-TAIJI joint observation
Abstract
LISA is considered to be launched alongside the Athena to probe the energetic astrophysical processes. LISA can determine the direction of sources for Athena's follow-up observation. As another space gravitational wave mission, TAIJI is expected to be launched in the 2030s. The LISA-TAIJI network would provide abundant merits for sources understanding. In this work, we simulate the joint LISA-TAIJI observations for gravitational waves from coalescing supermassive black hole binaries and monochromatic sources. By using the numerical mission orbits, we evaluate the performances of sky localization for various time-delay interferometry channels. For 30 days observation until coalescence, the LISA-TAIJI network in optimal operation can localize all simulated binary sources, (107,3.3 ×106)M⊙, (106,3.3 ×105)M⊙, and (105,3.3 ×104)M⊙ at redshift z =2 , in 0.4 deg2 (field of view of Wide Field Imager on Athena). The angular resolution can be improved by more than ten times comparing to LISA or TAIJI single detector at a given percentage of population. The improvements for monochromatic sources at 3 and 10 mHz are relatively moderate in one year observation. The precision of sky localization could be improved by a factor of 2 to 4 comparing to single LISA at a given percentage of sources. For a simulated 90 days observation for monochromatic waves, the LISA-TAIJI network still represents a considerable localization advantage which could be more than ten times better.
- Publication:
-
Physical Review D
- Pub Date:
- July 2020
- DOI:
- 10.1103/PhysRevD.102.024089
- arXiv:
- arXiv:2002.12628
- Bibcode:
- 2020PhRvD.102b4089W
- Keywords:
-
- General Relativity and Quantum Cosmology;
- Astrophysics - Astrophysics of Galaxies;
- Astrophysics - Instrumentation and Methods for Astrophysics
- E-Print:
- 18 pages, 12 figures