Add Pajkos information

Co-authored-by: Leo C. Stein <[email protected]>

_people/Michael_Pajkos.markdown

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+---
+name: Michael Pajkos 
+lastname: Pajkos
+group: postdocs
+position: Postdoctoral Researcher
+address: Cahill Center for Astronomy and Astrophysics
+institution: California Institute of Technology
+email: [email protected]
+website: https://sites.google.com/msu.edu/michaelpajkos/home
+specialties: Core-collapse supernovae, neutrinos, gravitational waves, neutron star mergers, particle physics, high performance computing 
+---
+
+##### Research profile
+
+I am interested in high-energy events in the cosmos.  My mentees and I use predictions of `multimessenger' signals from stellar explosions to better understand their properties.  I also investigate how small scale particles---like pions and muons---can affect the behavior of large-scale events---like when stellar remnants called neutron stars collide. 
+
+I also develop supernova simulations for the 
+[SpECTRE](https://github.com/sxs-collaboration/spectre) code, incorporating new kinds of physics to perform next-generation simulations of these cataclysmic events.  In the past, I also developed software for the [Flash-X](https://flash-x.org) code, contributing to the [Exascale Computing Project](https://www.exascaleproject.org/), and have performed observational studies of variable stars, whose brightness changes.
+
+##### Biography
+
+I am currently a postdoctoral scholar at Caltech working with Saul Teukolsky.  I received a Ph.D. from Michigan State University working with Prof. Sean Couch.  Outside of research, I am interested in applying effective ways to teach astrophysics in the classroom and outreach settings.
+
+##### Publications
+
+See my [ORCID](https://orcid.org/0000-0002-4983-4589).