2 papers
astro-ph.CO2026
Observational constraints on a damped harmonic oscillator model of dark energy
Saddam Hussain, Muhammad Ahmad, Ming Zhang +2
We constrain a damped harmonic oscillator (DHO) dark-energy equation of state using the full cosmic microwave background (CMB) likelihoods in combination with DESI BAO and three di…
astro-ph.HE2026
Astrophysical Population Coordinates for Supermassive Black Hole Binaries in Pulsar Timing Array Inference
Yikun Li, Muhammad Ahmad, Shaoguang Guo +1
Pulsar timing arrays can probe the population physics of supermassive black-hole binaries through the nanohertz gravitational-wave background. We construct a phenomenological forwa…