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    I am an astronomer, cosmologist, and data scientist. I am currently a NSF funded Assistant Research Scientist at the UC San Diego Center for Astrophysics & Space Sciences (CASS profile) and a Research Affiliate in the MIT Program in Science, Technology and Society (STS). I work on several theoretical and observational cosmology projects to devise and implement fun experiments that leverage cosmology to help test fundamental physics. These include a series of experiments with colleagues to test quantum theory with astronomical observations as well as Infrared and Optical observations of Type Ia Supernovae with ground and space based telescopes, which can be used to measure the expansion history of the universe, cosmic acceleration, and dark energy. Before UCSD, I was an NSF Postdoctoral Fellow at MIT, a NSF Funded Research Associate at MIT, and a Visiting Research Scientist at the MIT Center for Theoretical Physics. I completed my PhD in Astronomy & Astrophysics from the Harvard University Department of Astronomy and I received my BA in Physics & Astrophysics from UC Berkeley. I am very interested in projects at the intersection between observational astronomy, astrophysics, data analysis, and the philosophy of science, especially the philosophy of cosmology. I am excited to explore a range of fascinating scientific questions through research, science writing, art, animation, public outreach, and working with the science media. For more, see my Bio, Resume, and CV.
MIT Astronomy
MIT Vera
Tufts/MIT Cosmo

Cosmic Bell
David Kaiser
Jason Gallicchio
Alan Guth
Brian Keating
Anton Zeilinger
IQOQI, Vienna

Harvard CfA
Harvard Astro
Harvard PIN
Harvard Library
Andy's Cheat Sheets
NSF Essays
Shu Exam
Grad Students/Advisors
Student/Faculty Photos

Gamma Ray Burst Energetics and Cosmology
   Gamma-Ray Bursts (GRBs) are the brightest known explosions in the universe, thought to result from the collapse of massive stars and the formation of neutron stars or black holes, in a process that produces a highly energetic beam of gamma radiation, occasionally at the right viewing angle to be seen from earth, followed by a bright, multiwavelength afterglow at optical and other wavelengths. My master's thesis work in the Harvard University Department of Astronomy with Professor Ramesh Narayan and Professor Joshua Bloom focused on testing the potential applications of Gamma-Ray Bursts for cosmology by studying GRB spectra and energetics. We found that GRBs are currently not well-suited for precision cosmology compared to other better studied standardizable candles such as Type Ia supernovae, underscoring the difficulty of developing cosmological distance determination methods with novel classes of astrophysical events.
Toward a More Standardized Candle Using GRB Energetics and Spectra, Friedman, A.S. & Bloom, J.S. 2005, The Astrophysical Journal, Vol. 627, Issue 1, pp. 1-25, (astro-ph/0408413) (DOI)

Present and Future Prospects for GRB Standard Candles, Friedman, A.S. & Bloom, J.S. 2005, Il Nuovo Cimento C, Vol. 028, Issue 04-05, pp. 669-672, (astro-ph/0502559) (DOI)

The Promise and Limitations of GRB Standard Candles, Graduate Student Research Forum, Harvard University, (March 14, 2006)

The Present and Future of GRB Cosmology, Supernova Acceleration Probe (SNAP) Science Meeting, Lawrence Berkeley National Laboratories, Berkeley, California, (July 15, 2005)

Toward a More Standardized Candle Using GRB Energetics and Spectra, High Energy Astrophysics Division (HEAD) Lunch Talk, Harvard-Smithsonian CfA, Cambridge, MA, (Feb 9, 2005)

The Present and Future of GRB Cosmography, AAS Meeting #205, San Diego, CA, (Jan 9-13, 2005)

“Using GRBs For Cosmology” by Andrew Friedman,Sky & Telescope, Vol. 112, No. 8, p35, 2006 [PDF] (with Robert Naeye article below)
“Gamma Ray Bursts: New Cosmic Rulers?” by Robert Irion atScience, Vol. 306, Issue 5694, pp. 215, Oct 8 2004 [PDF]
Toward a More Standardized Candle Using GRB Energetics and Spectra, 4th Workshop on Gamma-Ray Bursts in the Afterglow Era, Rome, Italy, (Oct 18-22, 2004)

University of California, San Diego UCSD Center for Astrophysics & Space Sciences Massachusetts Institute of Technology MIT Center for Theoretical Physics Institute for Quantum Optics and Quantum Information, Vienna Harvard University Astronomy Harvard-Smithsonian Center for Astrophysics UC Berkeley Astronomy National Science Foundation National Aernautics & Space Administration
Last Updated: Andrew Samuel Friedman, 2/2017

University of California, San Diego, 9500 Gilman Drive
CASS, M/C 0424, SERF Bldg. 334, La Jolla, CA 92093-0424, USA (858) 534-5416

This material is based upon work supported by the National Science Foundation under NSF Award #1056580 (2012-2014) through an NSF Science, Technology, and Society Postdoctoral Fellowship at MIT and the NSF INSPIRE program via NSF Award #1541160 (2015-2018).

Original animations are shared under a
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 US License