About me

I am a graduate student in Astronomy and Astrophysics at the University of California, Los Angeles. My principle research interest is cosmology, dark energy, and dark matter. I am currently working with Professor Edward L. Wright to detect the integrated Sachs-Wolfe effect using WISE and WMAP data.

I was born and raised in Bangladesh. I moved to Japan after graduating high school and received my B.S. degree in physics from the University of Tokyo in 2014. When I am not researching, studying, or doing outreach, I enjoy sightseeing, self-defense training, watching movies, and playing video games.


Integrated Sachs-Wolfe effect

In a dark-energy-dominated universe, the large-scale potential well decays with time. CMB photons gain a little amount of energy after crossing such a decaying potential well, which is the integrated Sachs-Wolfe (ISW) effect. I analyzed WISE and WMAP data to detect the ISW effect signal at \(3.4\sigma\) S/N. (Picture at the left shows the galaxy overdensity from AllWISE data.)


I have taught the following courses as a teaching assistant at UCLA. I have also been a guest lecturer in Physics 127 and Astro 81.

  • Astronomy 3 - Nature of Universe
  • Physics 1C - Electrodynamics, Optics and Special Relativity
  • Physics 127 - General Relativity
  • Physics 6c - Physics for Life Sciences Majors: Light, Fluids, Thermodynamics, Modern Physics
  • Astro 81 - Astrophysics I: Stars and Nebulae
  • Astro 140 - Stellar Systems and Cosmology


Find my CV here.