Ashkbiz Danehkar

Post-Doctoral Fellow
Ann Arbor, MI, USA
I am an astronomer with expertise in planetary nebulae and active galactic nuclei. I perform my research using photo-ionization modeling, plasma diagnostics, elemental abundance analysis, and morpho-kinematic studies. My research interests include supermassive black holes, AGN feedback, galactic outflows, relativistic jets, galaxy formation and evolution.


  • R. Boissay-Malaquin, A. Danehkar, H. L. Marshall, M. A. Nowak, Relativistic Components of the Ultra-fast Outflow in the Quasar PDS 456 from Chandra/HETGS, NuSTAR, and XMM-Newton Observations, Astrophys.J.873:29,2019 doi:10.3847/1538-4357/ab0082
  • A. Danehkar, Electric-Magnetic Duality in Gravity and Higher-Spin Fields, Phys.6:146,2018 doi:10.3389/fphy.2018.00146
  • A. Danehkar, proEQUIB: IDL Library for Plasma Diagnostics and Abundance Analysis, J.Open Source Softw.3:899,2018 doi:10.21105/joss.00899
  • A. Danehkar, Book Review: Gauge/Gravity Duality: Foundations and Applications, Phys.6:82,2018 doi:10.3389/fphy.2018.00082
  • A. Danehkar, Electron beam-plasma interaction and electron-acoustic solitary waves in a plasma with suprathermal electrons, Plasma Phys.Control.Fusion, 2018 doi:10.1088/1361-6587/aabc40
  • G. A. Kriss, J. C. Lee, and A. Danehkar, A Search for H i Lyman α Counterparts to Ultra-fast X-ray Outflows, Astrophys.J.859:94,2018 doi:10.3847/1538-4357/aabf38
  • A. Danehkar, M. A. Nowak, J. C. Lee, G. A. Kriss, A. J. Young, et al., The Ultra-Fast Outflow of the Quasar PG 1211+143 as Viewed by Time-Averaged Chandra Grating Spectroscopy, Astrophys.J.853:165,2018 doi:10.3847/1538-4357/aaa427
  • G. A. Kriss, J. C. Lee, A. Danehkar, M. A. Nowak, T. Fang, et al., Discovery of an Ultraviolet Counterpart to an Ultra-Fast X-ray Outflow in the Quasar PG1211+143, Astrophys.J.853:166,2018 doi:10.3847/1538-4357/aaa42b
  • A. Danehkar, Bi-abundance ionization structure of the Wolf-Rayet planetary nebula PB 8, Publ.Astron.Soc.Austral.35:e005,2018 doi:10.1017/pasa.2018.1
  • A. Danehkar, M. A. Nowak, J. C. Lee, R. K. Smith, MPI_XSTAR: MPI-based Parallelization of the XSTAR Photoionization Program, Publ.Astron.Soc.Pac.130:024501,2018 doi:10.1088/1538-3873/aa9dff
  • A. Danehkar, M. Karovska, W. P. Maksym, R. Montez Jr., Mapping Excitation in the Inner Regions of the Planetary Nebula NGC 5189 using HST WFC3 Imaging, Astrophys.J.852:87,2018 doi:10.3847/1538-4357/aa9e8c
  • A. Danehkar, Electrostatic solitary waves in an electron-positron pair plasma with suprathermal electrons. Phys.Plasmas 24:102905,2017 doi:10.1063/1.5000873
  • A. Danehkar, Q. A. Parker, W. Steffen, Fast, low-ionization emission regions of the planetary nebula M2-42. Astron.J.151:38,2016 doi:10.3847/0004-6256/151/2/38
  • A. Danehkar, Discovery of collimated bipolar outflows in the planetary nebula Th 2-A. Astrophys.J.815:35,2015 doi:10.1088/0004-637X/815/1/35
  • A. Danehkar, Evolution of Planetary Nebulae with WR-type Central Stars. Publ.Astron.Soc.Pac.127:499,2015 doi:10.1086/681244
  • A. Danehkar, Q. A. Parker, Spatially resolved kinematic observations of the planetary nebulae Hen 3-1333 and Hen 2-113. Mon.Not.Roy.Astron.Soc.Lett.449:L56-L59,2015 doi:10.1093/mnrasl/slv022
  • A. Danehkar, H. Todt, B. Ercolano, A. Y. Kniazev, Observations and three-dimensional photoionization modelling of the Wolf–Rayet planetary nebula Abell 48. Mon.Not.Roy.Astron.Soc.439:3605-3615,2014 doi:10.1093/mnras/stu203
  • D. J. Frew, I. S. Bojičić, Q. A. Parker, M. Stupar, S. Wachter, ..., A. Danehkar, et al. The planetary nebula Abell 48 and its [WN] nucleus. Mon.Not.Roy.Astron.Soc.440:1345-1364,2014 doi:10.1093/mnras/stu198
  • A. Danehkar, Q. A. Parker, B. Ercolano, Observations and three-dimensional ionization structure of the planetary nebula SuWt 2. Mon.Not.Roy.Astron.Soc.434:1513-1530,2013 doi:10.1093/mnras/stt1116
  • A. Danehkar, N. S. Saini, M. A. Hellberg, I. Kourakis, Electron-acoustic solitary waves in the presence of a suprathermal electron component. Phys.Plasmas 18:072902,2011 doi:10.1063/1.3606365
  • A. Danehkar, On the significance of the Weyl curvature in a relativistic cosmological model. Mod.Phys.Lett.A24:3113-3127,2009 doi:10.1142/S0217732309032046
  • C. Bizdadea, E. M. Cioroianu, A. Danehkar, M. Iordache, S. O. Saliu, et al., Consistent interactions of dual linearized gravity in D = 5: couplings with a topological BF model. Eur.Phys.J.C63:491-519,2009 doi:10.1140/epjc/s10052-009-1105-0