3 papers
astro-ph.CO2026
CMB Bounds on Primordial Black Holes via Radiation Capture
Marzieh Farhang, S. M. S. Movahed
We explore the capture of neutrinos and photons in the cosmic neutrino and photon background by primordial black holes (PBHs). We model this phenomenon as a gravitational interacti…
astro-ph.CO2024
A Semiblind Reconstruction of the History of Effective Number of Neutrinos Using CMB Data
Sarah Safi, Marzieh Farhang, Olga Mena +1
We explore the possibility of redshift-dependent deviations in the contribution of relativistic degrees of freedom to the radiation budget of the cosmos, conventionally parameteriz…
gr-qc2024
Compact Binary Merger Rate with Modified Gravity in Dark-Matter Spikes
Saeed Fakhry, Sara Gholamhoseinian, Marzieh Farhang
In this study, we investigate the impact of modified gravity on the merger rate of compact binaries within dark-matter spikes surrounding super-massive black holes (SMBHs). Specifi…