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Explore how gravitational wave detections can be used as "standard sirens" to measure the cosmic expansion rate in this research seminar by Sergio Vallejo from ICTP-SAIFR. Learn about the theoretical foundations of using gravitational waves as cosmological distance indicators, understand how binary black hole and neutron star mergers provide independent measurements of the Hubble constant, and discover the advantages of this method compared to traditional electromagnetic observations. Examine the current observational data from LIGO-Virgo-KAGRA collaborations, analyze the statistical methods used to extract cosmological parameters from gravitational wave signals, and discuss the potential for resolving the Hubble tension through multi-messenger astronomy approaches. Gain insights into the future prospects of gravitational wave cosmology as next-generation detectors come online and how standard sirens may revolutionize our understanding of cosmic expansion and dark energy.
