Associate Chair for Graduate Program
Contact Information Email: david.ballantyne [at] physics.gatech.edu
Phone: (404) 385-3909
Fax: (404) 894-9958
Office: 1-60 Boggs Bldg
My research concentrates on topics in high-energy astrophysics with an emphasis on interpreting existing data and making predictions for future observations. My main interests are: (i) the evolution of galaxies and their central supermassive black holes (ii) astroparticle physics and (iii) the physics of accretion disks around both black holes and neutron stars. My work often involves comparing computer based models with published data from X-ray, TeV, radio and/or infrared telescopes. All of these directions are guided by my underlying research philosophy of using any necessary tool or technique, unlimited by wavelength range or physical process, to make progress in understanding the relevant physics. Students working with me will be exposed to a wide range of astrophysical processes and theories, but will also learn to respect and be guided by observational constraints.
- Physics 8803 - High Energy
- Physics 4247 - Cosmology
and Extragalactic Astrophysics
- Physics 3123 - Electrodynamics
- Physics 2212 - Intro. Physics II
Some Representative Publications (full publications list in PDF)
- Gohil, R. & Ballantyne, D.R., 2018, The Shape of the Cosmic X-ray Background: Nuclear Starburst Discs and the Redshift Evolution of AGN Obscuration, Monthly Notices of the Royal Astronomical Society, Vol. 475, p. 3543.
- Ballantyne, D.R., 2017, Ionised Accretion Discs in Active Galactic Nuclei: The Effects
of a Lamppost with a Variable Height, Monthly Notices of the Royal Astronomical Society Letters, Vol. 472, p. L60.
- Ballantyne, D.R., 2017, Clustering, Cosmology and a New Era of Black Hole Demographics - I. The Conditional Luminosity Function of Active Galactic Nuclei, Monthly Notices of the Royal Astronomical Society, Vol. 464, p. 613.
- Keek, L., Ballantyne, D.R., Kuulkers, E. & Strohmayer, T.E., 2014, Characterizing the Evolving X-ray Spectral Features During a Superburst from 4U 1636-536, The Astrophysical Journal, Vol. 789, p. 121.
- Draper, A.R. & Ballantyne, D.R., 2012, A Tale of Two Populations: The Contribution of Merger and Secular Processes to the Evolution of Active Galactic Nuclei, The Astrophysical Journal, 751, 72
- Ballantyne, D.R., Draper, A.R., Madsen, K.K., Rigby, J.R. & Tresiter, E., 2011, Lifting the Veil on Obscured Accretion: Active Galactic Nuclei Number Counts and Survey Strategies for Imaging Hard X-Ray Missions, The Astrophysical Journal, 736, 56
- Draper, A.R. & Ballantyne, D.R., 2009, Balancing the Cosmic Energy Budget: The Cosmic X-ray Background, Blazars, and the Compton Thick Active Galactic Nucleus Fraction, The Astrophysical Journal, Vol. 707, p. 778.
Professional Experience (click here for CV)
- 2017 - present Associate Chair for Graduate Studies,
School of Physics
- 2014 - present Associate Professor of Physics,
- 2008 - 2014 Assistant Professor of Physics, Georgia Tech
- 2005 - 2008 Prize Postdoctoral Fellowship in Theoretical Astrophysics, The University of Arizona
- 2002 - 2005 Postdoctoral Fellow, Canadian Institute for Theoretical Astrophysics
- 1999 - 2002 Ph.D., Astronomy, Cambridge University, U.K.
- 1998 - 1999 M.Sc., Astronomy & Physics, University of Toronto, Canada
- 1993 - 1998 B.Sc., Honors Physics & Astronomy (Co-op), University of Victoria, Canada