The Blue Hour

CiTR & Discorder Magazine

The Blue Hour is a conversation – a dialogue about life, literature, science, philosophy and everything in between.

  1. Sep 8

    Hrishabh Srivastava: Probing Dark Matter with Nature’s Magnifying Glass

    In this conversation, I speak with Hrishabh Srivastava, a PhD student in Astronomy at the University of British Columbia and a member of the Euclid Strong Lensing Science Working Group. Originally trained in materials engineering and data science at the Indian Institute of Technology Madras, Hrishabh transitioned into astrophysics, where his research focuses on strong gravitational lensing, dark matter and the enormous quantities of astronomical data being produced by the Euclid Space Telescope. Earlier this year, he was a finalist in UBC’s Three Minute Thesis competition with *Probing Dark Matter with Nature’s Magnifying Glass*. His research explores how the gravity of a foreground galaxy bends and distorts light from a more distant galaxy—a consequence of Einstein’s theory of general relativity—and how these rare gravitational lenses can be used to investigate the distribution of otherwise invisible dark matter. He is developing a method using Zernike polynomials to identify the geometric features of strong lenses in Euclid images, providing a simpler and more interpretable alternative to computationally intensive deep-learning methods. We discuss what dark matter is—and what we still do not know about it—how gravitational lensing allows astronomers to investigate something they cannot see directly, and how the Euclid mission could dramatically expand the number of known strong gravitational lenses.

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The Blue Hour is a conversation – a dialogue about life, literature, science, philosophy and everything in between.