Arthur Kosowsky

Photo of Arthur Kosowsky

Arthur Kosowsky is Professor of Physics and Astronomy at the University of Pittsburgh, and Associate Director of the Pittsburgh Particle Physics, Astrophysics, and Cosmology Center (PITT PACC). His research focuses on cosmology, gravitation, and high-energy physics. He is known particularly for work on the cosmic microwave background radiation, and he is a member of the Atacama Cosmology Telescope and the Simons Observatory collaborations to map the microwave sky.

Particles and Fields

Viewpoint: Can we test inflationary expansion of the early universe?

A set of proposed relations among observable quantities may allow strong tests of whether a rapid expansion of the very early universe produced the seeds of the large-scale structure we see today. Read More »


Viewpoint: Connecting the Bright and Dark Sides of Galaxies

A universal law shows that the rotation of a disk galaxy is determined entirely by the visible matter it contains, even if the disk is mostly filled with dark matter. Read More »