Nathan J Goldbaum received his B.A. in Physics from the University of Colorado in 2009 and his M.S. in Astronomy and Astrophysics from the University of California, Santa Cruz in 2011. He is currently a Ph.D. student in Astronomy and Astrophysics at UC Santa Cruz. He is a core contributor to the yt astrophysics analysis toolkit and the Enzo hydrodynamics code, contributing code, documentation, and user support. He has authored or co-authored 5 journal publications and conference talks on topics related to galaxy formation simulations and the evolution of giant molecular clouds.

1. Nathan J Goldbaum
University of California Santa Cruz
Department of Astronomy & Astrophysics
Santa Cruz, CA 95064
Email: goldbaum@ucolick.org
Homepage: http://bitbucket.org/ngoldbaum
Education
B.A., Physics, University of Colorado, 2009
M.S., Astronomy & Astrophysics, University of California Santa Cruz, 2011
Ph.D. Student in Astronomy & Astrophysics, University of California Santa Cruz, 2009 – Present
Open Source Contributions1
yt
A python analysis and visualization toolkit for 3D hydrodynamics and N-body simulations.
Core Contributor and Project Member, 2012 – Present
Actively involved in developing new features and fixing bugs reported by users, with nearly 300 pull
requests merged. Participates regularly in project management and planning, including design and
implementation discussions, code review, and user support on IRC and mailing lists.
Symbolic Unit System, 2013 – 2014
Designed YTArray, a subclass of the NumPy ndarray that can perform speedy in-place unit conversion,
validation, and coercion on array data. Led the collaborative, test-driven development effort to revamp
the yt codebase so that unit metadata are explicitly attached to simulation data and parameters.
PlotWindow Plotting Interface, 2012 – Present
Created an interface for visualizing slices and projections of simulation data. Designed to have sane de-faults,
and be simultaneously suitable for quick data exploration and in-depth customization to produce
publication-quality figures. Responsible for initial design, implementation, documentation, as well as
ongoing improvement and maintenance.
Enzo
A freely available 3D hydro/N-body code written in C++ and Fortran. Includes higher-order hydrodynamics
and physics packages suitable for simulating galaxy formation.
Contributor, 2012 – Present
Regularly contributes bugfixes and new features with over 50 merged pull requests. Participates in
developer discussions and user support on the mailing lists and IRC.
Isolated Galaxy Initial Conditions, 2014
Implemented an initial conditions generator suitable for simulating idealized isolated disk galaxy mod-els.
Active Particles, 2012 – 2013
Collaborated on designing and implementing a new infrastructure for particle types can arbitrarily the
state of the gas in a distributed MPI-parallel calculation running on hundreds of cores. Makes it easy
to implement models for physics happening on unresolved scales. Involved significant refactoring of a
large legacy C++ codebase.
1See https://www.openhub.net/accounts/ngoldbaum for a contribution summary

2. Nathan J Goldbaum 2
Publications
Journal Articles
“Radial Mass Transport in Gravitationally Unstable Disk Galaxies”, Goldbaum, N. J., Krumholz M. R., and
John C. Forbes, 2015, Astrophysical Journal, in prep
“ENZO: An Adaptive Mesh Refinement Code for Astrophysics”, The Enzo Collaboration and 19 co-authors,
including Goldbaum, N. J., Astrophysical Journal Supplement, 2014, 211, 19
“The AGORA High-Resolution Galaxy Simulations Comparison Project”, Kim, J. H. and 45 co-authors,
including Goldbaum, N. J., Astrophysical Journal Supplement, 2014, 210, 14
“The Global Evolution of Giant Molecular Clouds II: The Role of Accretion”, Goldbaum, N. J., Krumholz,
M. R., Matzner, C. D., & McKee, C. F. 2011, Astrophysical Journal, 738, 101
“The Intensity Profile of the Solar Supergranulation”, Goldbaum, N. J., Rast, M. P., Ermolli, I., Sans, J. S., &
Berrilli, F. 2009, Astrophysical Journal, 707, 67
Talks and Proceedings
“yt: Volumetric Data Analysis”, Goldbaum, N. J. et al., SciPy 2014 talk
“From Gas To Stars: Simulating a Population of GMCs”, Goldbaum, N. J., Krumholz, M. R., 2013, Proc.
IAUS 292, 91
“The Role of Accretion in the Evolution of Giant Molecular Clouds” Goldbaum, N. J., Krumholz M. R.
2010, From Stars to Galaxies, J. Tan & S. Van Loo (eds.)
“Disk Dynamos in Simulations of Collapsing Cores” Goldbaum, N. J., Federrath C. 2011 ISIMA Final
Reports, P. Garaud (ed.), e-proceedings: http://isima.ucsc.edu/2011/students.html
Prizes and Fellowships
Outstanding Bachelor of Arts in Physics, Spring 2009
UC Regents Fellowship, Fall 2009 – Winter 2010
NSF Graduate Research Fellowship Fall 2010 – Fall 2013
UCSC Astronomy & Astrophysics Whitford Prize Spring 2011
Public Outreach
Author and Editor for Astrobites, 2010 – Present
Astrobites is a research blog that posts undergrad-level summaries of recent papers published on the
astro-ph preprint server. Authored 23 posts before retiring as an author in Summer 2012 but continues
to regularly edit posts as part of the astrobites editorial committee.
http://astrobites.com/author/ngoldbaum/