https://sudonull.com/gravitational-waves-measure-the-hubble-constant
New measurement H_0 = 69.9 km/s/Mpc via GW sirens resolves the Hubble tension. Details of the method, comparison with CMB and SN. For astronomers and cosmologists.
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In this project
https://sudonull.com/atoms-for-gravitational-wave-detection-new-model
Theoretical model uses spontaneous emission of atoms to detect gravitational waves. Compact detectors based on atomic clocks. Details of the mechanism and sensitivity calculations. Study for IT and physics.
https://sudonull.com/squeezed-light-for-gravitational-wave-detection
Learn how squeezed light reduces quantum noise in LIGO interferometers, increasing sensitivity to black hole mergers. Technical details of PDC and OPO for developers.
https://sudonull.com/black-hole-resonance-in-ligo-python-analysis
Extracting the gravitational hum of black holes from LIGO data with gwpy. Formula, DSP code, results for Cygnus X-1 and others. Check the signals yourself — accuracy 0.2%.
From other projects
https://ymaho.com/young-galaxy-has-old-stars-einstein-cross-discovery
A distant galaxy with ancient stars challenges galaxy formation theories. Learn how Einstein's gravity helped reveal this cosmic puzzle.
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