Research

  Black hole astrophysics                    

  Black hole jets            Actual image of the black hole at the center of M87 
 Image of powerful radio jets   First image of a black hole
 
Within the last 2 decades astronomers have discovered that black holes  are ubiquitous in the Universe, that while stellar mass black holes  populate galaxies by the millions, each galaxy also hosts a central  supermassive black hole that is 10 million to 10 billion times the mass of  the Sun.  And when matter falls into these black holes they light up, some of them shining so brightly they can be seen across the  Universe.  Researchers are trying to understand how the enormous  amounts of energy that are emitted from the centers of these active galaxies can shape both their host galaxy as well as the intergalactic medium, an exploration that takes us back to shortly after the big bang when the Universe was only 5% of its current age. See http://www.jpl.nasa.gov/news/news.php?release=2010-186 and http://www.sciencemag.org/news/2010/06/are-backward-black-holes-key-galaxies-biggest-blasts for press releases on my research. 
 
 
Student researchers (former and current)
 
  • Kathryn Kennedy
  • Adam Bunce
  • Matthew Hopkins
  • Brandt Webster
  • Alexa Zack
  • Andrew Jones (PhD in Computing with Computational Science & Engineering emphasis at Boise State University)                           
  • Diamonik Hough  
  • Jordan Simon                      
  • Brenton Raffensberger
  • Matthew I. Kim  (Former grad student at California State University and Univ. of Manchester, UK)
  • Ella Osby                  (Undergraduate astronomy major at Arizona State University)
  • Derrick Pruitt                       
  • Jaclyn D’Avanzo       (Graduate student in astrophysics at Clemson University)
  • Emily Hollingworth   (Undergraduate at Georgia Tech)            
  • Aaron Lowery
  • Matthew Harmon                
  • Michael Barnhill        (Undergraduate at Georgia Tech)
 
Publications
 
       2019
  • David Garofalo, Merger signatures in low excitation radio galaxies, Monthly Notices of the Royal Astronomical Society, article link
  • David Garofalo, Damian J. Christian, Andrew M. Jones, The sub-Eddington boundary for the quasar mass-luminosity plane: A theoretical perspective, Universe, article link 
  • David Garofalo, Resolving the radio loud/radio quiet dichotomy without thick disks, the Astrophysical Journal Letters, article link
  • David Garofalo & Chandra B. Singh, FR0 radio galaxies and their place in the radio morphology classification, the Astrophysical Journal, article link
  • David Garofalo, Chandra B. Singh, Dylan T. Walsh, Damian J. Christian, Andrew M. Jones, Alexa Zack, Brandt Webster, Matthew I. Kim, The redshift distribution of BL Lacs and FSRQs, Research in Astronomy and Astrophysics, article link

       2018

  • David Garofalo, Chandra B. Singh, Alexa Zack, The distribution and lifetime of powerful radio galaxies as a function of environment and redshift, Scientific Reports - Nature, article link
  • Chandra B. Singh, David Garofalo, Elisabete M. de Gouveia Dal Pino, Magnetic reconnection and Blandford-Znajek process around rotating black holes, Monthly Notices of the Royal Astronomical Society, 2018 article link

       2017

  • David Garofalo, Magnetic fields threading black holes: Restrictions from general relativity and implications for astrophysical black holes, Astrophysics & Space Science, 2017 article link

       2016

  • Matthew I. Kim, Damian J. Christian, David Garofalo, Jaclyn D'Avanzo, Possible evolution of supermassive black holes from FRI quasars, Monthly Notices of the Royal Astronomical Society, article link
  • David Garofalo, Matthew I. Kim, Damian J. Christian, Emily Hollingworth, Aaron Lowery, Matthew Harmon, Reconciling AGN-star formation, the Soltan argument, and Meier's paradox, the Astrophysical Journal,  article link
  • David Garofalo & Chandra B. Singh, Scale-invariant jet suppression across the black hole mass scale, Astrophysics & Space Science, article link

       2015

  • David Garofalo, Symmetry and the arrow of time in theoretical black hole astrophysics, Journal of Gravity, article link

       2014

  • David Garofalo, Matthew I. Kim, & Damian J. Christian, Constraints on the radio loud/radio quiet dichotomy from the fundamental plane, Monthly Notices of the Royal Astronomical Society, article link

       2013

  • David Garofalo, The jet-disc connection: evidence for a reinterpretation in radio loud and radio quiet active galactic nuclei, Monthly Notices of the Royal Astronomical Society, 2013 article link
  • David Garofalo, Retrograde versus Prograde Models of Accreting Black Holes, Advances in Astronomy, article link

       2011

  • Masanori Nakamura, David L. Meier & David Garofalo, Magnetohydrodynamic properties of extragalactic jets, Astrophysics & Space Science

       2010

  • Masanori Nakamura, David Garofalo & David L. Meier, A magnetohydrodynamic model of the M87 jet. I. Superluminal Knot Ejections from HST-1 as Trails of Quad Relativistic MHD Shocks, the Astrophysical Journal
  • David Garofalo & David L. Meier, Misconceptions about general relativity in theoretical black hole astrophysics, Monthly Notices of the Royal Astronomical Society, article link
  • David Garofalo, Daniel A. Evans & Rita M. Sambruna, The evolution of radio loud active galactic nuclei as a function of black hole spin, Monthly Notices of the Royal Astronomical Society, article link

       2009

  • David Garofalo, Signatures of black hole spin in galaxy evolution, the Astrophysical Journal Letters, 2009, article link
  • David Garofalo, The spin dependence of the Blandford-Znajek effect, the Astrophysical Journal, 2009, article link
  • David Garofalo, Spacetime constraints on accreting black holes, Physical Review D, 2009 article link

       2008

  • David Garofalo, Magnetic fields around black holes, PhDT

       2006

  • Chris Reynolds, David Garofalo & Mitch Begelman, Trapping of magnetic flux by the plunge region of a black hole accretion disk, the Astrophysical Journal, article link

       2005

  • Chris Reynolds, Laura W. Brenneman & David Garofalo, Black hole spin in AGN and GBHCs, Astrophysics & Space Science
  • David Garofalo & Chris Reynolds, Sporadically torqued accretion disks around black holes, the Astrophysical Journal, article link
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