N3AS Fellows

2017 Fellows


Evan Grohs

Evan graduated from University of Chicago in 2005 with a B.A. in physics and mathematics.  He worked for three years in industry before he returned to academia to do research in nuclear astrophysics.  Evan received his PhD in 2015 from University of California San Diego where he worked with George Fuller.  After completing his PhD, Evan accepted a postdoc at University of Michigan working with Fred Adams.

Evan’s research centers on neutrino cosmology.  His focus is on the quantum kinetics of neutrino decoupling which occurs roughly one second after the big bang.  Using high-precision numerical calculations, Evan attempts to put constraints on physics beyond the standard model, primarily by using primordial abundances and cosmic microwave background observables. In addition, Evan’s interest in nuclear astrophysics lies in investigating the unique characteristics of nature in the context of fine-tuning arguments.

Selected Papers:

Neutrino Decoupling in BBN

E. Grohs and G. M. Fuller, “The surprising influence of late charged current weak interactions on Big Bang Nucleosynthesis,” Nuclear Physics B 911, 955-973 (2016), arXiv: 1607.02797.

F. C. Adams and E. Grohs, “On the Habitability of Universes without Stable Deuterium,” Astropart. Phys. 91 90 (2017), arXiv: 1612.04741.


Amol Patwardhan

Amol completed his PhD in Physics in 2017 at the University of California, San Diego (UCSD), where he worked with Prof. George Fuller at the Center for Astrophysics and Space Sciences. He previously graduated from IIT Bombay in 2011 with a bachelors degree in Engineering Physics. As part of the N3AS network, Amol is currently based at University of Wisconsin-Madison, with Prof. Baha Balantekin as his local mentor.

Amol’s research interests include neutrino and particle astrophysics and cosmology. In particular, he has worked on modelling neutrino flavor and spin transformations in astrophysical environments, and is also interested in sterile neutrino dark matter models and their cosmological implications.


Sherwood Richers

Sherwood completed his PhD in physics at the California Institute of Technology in 2017, where he was a DOE CSGF and a Blue Waters graduate fellow. He completed his undergraduate degree in Astronomy-Physics at the University of Virginia in 2012. Sherwood is currently located at North Carolina State University.

Sherwood’s research is focused on numerical methods of neutrino transport in core-collapse supernovae and neutron star mergers.