Gravitational wave standard sirens: A brief review of cosmological parameter estimation
JournalScience China Physics, Mechanics & Astronomy 69(2), 220401 (2026)
First public: Published online:
- Cosmology & gravitation
Research summary
Gravitational-wave standard sirens offer distance measurements that complement electromagnetic observations. This review surveys cosmological constraints and future prospects, emphasizing how combined observations can reduce parameter degeneracies. It discusses systematic uncertainties in distance inference and host identification, alongside opportunities to combine sirens with other probes of the late universe.
Extended notes
The review considers current expansion-rate measurements and future cosmological applications. Detector calibration, lensing, peculiar velocities, and galaxy-catalog completeness are among the uncertainties discussed.