Academic Research Projects
Check out my research portfolio on Google Scholar.
Mock simulation of the Birkinshaw-Gull effect (Yasini+2019)
Transverse velocities of massive objects like galaxy clusters induces a dipolar pattern in the temperature of the CMB. The signal is extremely small and currently unmeasurable. In this project we introduce a statistical estimator which will enable the next generation of CMB surveys such as SO and CMB-S4 to measure this effect for the first time.
Note: this effect is also known as the Rees-Sciama effect, and the unfortunate misnomer the moving lens effect.
The motion of the Solar System with respect to the CMB induces distortions in the temperature and polarization maps that we observe in our local frame. These distortions become non-negligible at smaller angular scales and have to be corrected for. In this project we investigate the implications of the motion-induced effects for cosmology and propose tools for correcting them in CMB observations.
The bulk motion of the intracluster medium (ICM) induces a shift in the temperature and polarization of the CMB in the direction of galaxy clusters known as the kinetic Sunyaev-Zeldovich (kSZ) effect. In this project we show that aside from probing the velocity of clusters, this signal can be exploited to measure or constrain the low multipoles moments of the CMB (dipole, quadrupole, and octupole) at remote locations in the universe (high redshifts).
Kinetic Sunyaev Zeldovich Polarization and the Remote CMB Multipoles
Published in PRD