MIT Kavli Institute Directory

My research focuses on 21 cm Cosmology. Our goal is to map the early universe, both before and during the Epoch or Reionization, using the 21cm transition of neutral hydrogen. That signal will allow us to directly study the astrophysics of reionization and eventually to make precise measurements of cosmological parameters. Though a vast amount of information is potentially accessible by tomographically mapping the early universe with low frequency radio waves, that signal is dwarfed by enormous foregrounds and significant noise. My work so far has focused on developing and applying fast, yet information-theoretically optimal techniques for estimating the power spectrum of 21cm emission, despite those contaminants, that includes a robust accounting of the errors on those measurements.