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Dr Jörg Hennig

(PhD (Dr. rer. nat.) University Jena)Joerg Hennig (2022)

Senior Lecturer
Director of Studies for 200-300-level Mathematics

Office: Science III, room 215
Tel +64 3 479 7765
Email joerg.hennig@otago.ac.nz

About

Jörg completed a PhD in theoretical physics in 2007 under the supervision of Gernot Neugebauer at the Friedrich Schiller University Jena, Germany. After spending four years in Potsdam as a post-doctoral fellow at the Albert Einstein Institute, he was appointed at the University of Otago's Department of Mathematics and Statistics in 2011.

Teaching responsibilities

Teaching responsibilities include:

  • COMO 303 Numerical Methods
  • MATH 203 Calculus of Several Variables
  • MATH 130 Fundamentals of Modern Mathematics 1
  • MATH 4NT Analytic Number Theory

Research Interests

Jörg's primary research interests lie in the field of General Relativity — Albert Einstein’s theory of gravitation. In particular, he is studying:

  • axisymmetric and stationary spacetimes
  • cosmological models
  • numerical relativity
  • the application of pseudo-spectral methods to the numerical solution of hyperbolic PDEs.

For more details, see this page: https://gravity.otago.ac.nz/people/jorg-hennig/81-2/

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Publications

Arun, K. G., Belgacem, E., Benkel, R., Bernard, L., Berti, E., Bertone, G., … Frauendiener, J., Hennig, J., … Zumalacárregui, M. (2022). New horizons for fundamental physics with LISA. Living Reviews in Relativity, 4. Advance online publication. doi: 10.1007/s41114-022-00036-9

Hennig, J., Frauendiener, J., & Macedo, R. P. (2022). The conformally invariant wave equation near spacelike infinity on Minkowski, Schwarzschild and Kerr. Proceedings of the Australasian Society for General Relativity & Gravitation (ASGRG) 11th Australasian Conference on General Relativity & Gravitation. Retrieved from https://www.asgrg2021.org/

Hennig, J., & Macedo, R. P. (2021). Fully pseudospectral solution of the conformally invariant wave equation on a Kerr background. Classical & Quantum Gravity, 38(13), 135006. doi: 10.1088/1361-6382/abfd86

Beyer, F., Frauendiener, J., & Hennig, J. (2020). Explorations of the infinite regions of spacetime. International Journal of Modern Physics D, 29(10), 2030007. doi: 10.1142/S0218271820300074

Barausse, E., Berti, E., Hertog, T., Hughes, S. A., Jetzer, P., Pani, P., … Frauendiener, J., … Hennig, J., … Yunes, N. (2020). Prospects for fundamental physics with LISA [Invited report]. General Relativity & Gravitation, 52, 81. doi: 10.1007/s10714-020-02691-1

Neugebauer, G., & Hennig, J. (2014). Stationary black-hole binaries: A non-existence proof. In J. Bičák & T. Ledvinka (Eds.), General relativity, cosmology and astrophysics. (pp. 209-228). Cham, Switzerland: Springer. doi: 10.1007/978-3-319-06349-2_9

Chapter in Book - Research

Arun, K. G., Belgacem, E., Benkel, R., Bernard, L., Berti, E., Bertone, G., … Frauendiener, J., Hennig, J., … Zumalacárregui, M. (2022). New horizons for fundamental physics with LISA. Living Reviews in Relativity, 4. Advance online publication. doi: 10.1007/s41114-022-00036-9

Journal - Research Article

Hennig, J., & Macedo, R. P. (2021). Fully pseudospectral solution of the conformally invariant wave equation on a Kerr background. Classical & Quantum Gravity, 38(13), 135006. doi: 10.1088/1361-6382/abfd86

Journal - Research Article

Beyer, F., Frauendiener, J., & Hennig, J. (2020). Explorations of the infinite regions of spacetime. International Journal of Modern Physics D, 29(10), 2030007. doi: 10.1142/S0218271820300074

Journal - Research Article

Hennig, J. (2020). Axis potentials for stationary n-black-hole configurations. Classical & Quantum Gravity, 37, 19LT01. doi: 10.1088/1361-6382/abb116

Journal - Research Article

Hennig, J. (2019). On the balance problem for two rotating and charged black holes. Classical & Quantum Gravity, 36, 235001. doi: 10.1088/1361-6382/ab4f41

Journal - Research Article

Hennig, J. (2019). Smooth Gowdy-symmetric generalised Taub–NUT solutions in Einstein–Maxwell theory. Classical & Quantum Gravity, 36(7), 075013. doi: 10.1088/1361-6382/ab0be0

Journal - Research Article

Frauendiener, J., & Hennig, J. (2018). Fully pseudospectral solution of the conformally invariant wave equation near the cylinder at spacelike infinity. III: Nonspherical Schwarzschild waves and singularities at null infinity. Classical & Quantum Gravity, 35, 065015. doi: 10.1088/1361-6382/aaac8d

Journal - Research Article

Frauendiener, J., & Hennig, J. (2017). Fully pseudospectral solution of the conformally invariant wave equation near the cylinder at spacelike infinity. II: Schwarzschild background. Classical & Quantum Gravity, 34, 045005. doi: 10.1088/1361-6382/aa54c4

Journal - Research Article

Hennig, J. (2016). Gowdy-symmetric cosmological models with Cauchy horizons ruled by non-closed null generators. Journal of Mathematical Physics, 57, 082501. doi: 10.1063/1.4961151

Journal - Research Article

Hennig, J. (2016). New Gowdy-symmetric vacuum and electrovacuum solutions. Classical & Quantum Gravity, 33, 135005. doi: 10.1088/0264-9381/33/13/135005

Journal - Research Article

Beyer, F., & Hennig, J. (2014). An exact smooth Gowdy-symmetric generalized Taub–NUT solution. Classical & Quantum Gravity, 31(9), 095010. doi: 10.1088/0264-9381/31/9/095010

Journal - Research Article

Frauendiener, J., & Hennig, J. (2014). Fully pseudospectral solution of the conformally invariant wave equation near the cylinder at spacelike infinity. Classical & Quantum Gravity, 31(8), 085010. doi: 10.1088/0264-9381/31/8/085010

Journal - Research Article

Hennig, J. (2014). Geometric relations for rotating and charged AdS black holes. Classical & Quantum Gravity, 31(13), 135005. doi: 10.1088/0264-9381/31/13/135005

Journal - Research Article

Hennig, J. (2013). Fully pseudospectral time evolution and its application to 1 +1 dimensional physical problems. Journal of Computational Physics, 235, 322-333. doi: 10.1016/j.jcp.2012.10.040

Journal - Research Article

Beyer, F., & Hennig, J. (2012). Smooth Gowdy-symmetric generalized Taub–NUT solutions. Classical & Quantum Gravity, 29, 245017. doi: 10.1088/0264-9381/29/24/245017

Journal - Research Article

Neugebauer, G., & Hennig, J. (2012). Stationary two-black-hole configurations: A non-existence proof. Journal of Geometry & Physics, 62, 613-630. doi: 10.1016/j.geomphys.2011.05.008

Journal - Research Article

Ansorg, M., Hennig, J., & Cederbaum, C. (2011). Universal properties of distorted Kerr-Newman black holes. General Relativity & Gravitation, 43(5), 1205-1210. doi: 10.1007/s10714-010-1136-8

Journal - Research Article

Hennig, J., & Neugebauer, G. (2011). Non-existence of stationary two-black-hole configurations: The degenerate case. General Relativity & Gravitation, 43(11), 3139-3162. doi: 10.1007/s10714-011-1228-0

Journal - Research Article

Hennig, J., & Ansorg, M. (2010). Regularity of Cauchy horizons in S2 x S1 Gowdy spacetimes. Classical & Quantum Gravity, 27, 065010. doi: 10.1088/0264-9381/27/6/065010

Journal - Research Article

Hennig, J., Cederbaum, C., & Ansorg, M. (2010). A universal inequality for axisymmetric and stationary black holes with surrounding matter in the Einstein-Maxwell theory. Communications in Mathematical Physics, 293(2), 449-467. doi: 10.1007/s00220-009-0889-y

Journal - Research Article

Ansorg, M., & Hennig, J. (2009). Inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter in Einstein-Maxwell theory. Physical Review Letters, 102, 221102. doi: 10.1103/PhysRevLett.102.221102

Journal - Research Article

Hennig, J., & Ansorg, M. (2009). A fully pseudospectral scheme for solving singular hyperbolic equations on conformally compactified space-times. Journal of Hyperbolic Differential Equations, 6(1), 161-184.

Journal - Research Article

Hennig, J., & Ansorg, M. (2009). The inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter in Einstein-Maxwell theory: Study in terms of soliton methods. Annales Henri Poincaré, 10(6), 1075-1095. doi: 10.1007/s00023-009-0012-0

Journal - Research Article

Neugebauer, G., & Hennig, J. (2009). Non-existence of stationary two-black-hole configurations. General Relativity & Gravitation, 41, 2113-2130. doi: 10.1007/s10714-009-0840-8

Journal - Research Article

Ansorg, M., & Hennig, J. (2008). The inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter. Classical & Quantum Gravity, 25, 222001. doi: 10.1088/0264-9381/25/22/222001

Journal - Research Article

Hennig, J., Ansorg, M., & Cederbaum, C. (2008). A universal inequality between the angular momentum and horizon area for axisymmetric and stationary black holes with surrounding matter. Classical & Quantum Gravity, 25, 162002. doi: 10.1088/0264-9381/25/16/162002

Journal - Research Article

Hennig, J., Neugebauer, G., & Ansorg, M. (2007). Thermodynamic description of inelastic collisions in general relativity. Astrophysical Journal, 663, 450-460. doi: 10.1086/518412

Journal - Research Article

Hennig, J., & Neugebauer, G. (2006). Collisions of rigidly rotating disks of dust in general relativity. Physical Review D, 74, 064025. doi: 10.1103/PhysRevD.74.064025

Journal - Research Article

Barausse, E., Berti, E., Hertog, T., Hughes, S. A., Jetzer, P., Pani, P., … Frauendiener, J., … Hennig, J., … Yunes, N. (2020). Prospects for fundamental physics with LISA [Invited report]. General Relativity & Gravitation, 52, 81. doi: 10.1007/s10714-020-02691-1

Journal - Research Other

Hennig, J. (2017). Gowdy-symmetric vacuum and electrovacuum solutions. In M. Bianchi, R. T. Jantzen & R. Ruffini (Eds.), Proceedings of the Fourteenth Marcel Grossmann Meeting on General Relativity. (pp. 2717-2722). Singapore: World Scientific. doi: 10.1142/9789813226609_0334

Conference Contribution - Published proceedings: Full paper

Hennig, J., & Neugebauer, G. (2012). Non-existence of stationary two-black-hole configurations. In T. Damour, R. T. Jantzen & R. Ruffini (Eds.), Proceedings of the Twelfth Marcel Grossman Meeting (MG12) on Recent Developments in Theoretical and Experimental General Relativity, Astrophysics and Relativistic Field Theories. (pp. 1756-1758). Singapore: World Scientific. doi: 10.1142/9789814374552_0317

Conference Contribution - Published proceedings: Full paper

Ansorg, M., & Hennig, J. (2011). The interior of axisymmetric and stationary black holes: Numerical and analytical studies. Journal of Physics: Conference Series, 314(1), 012017. doi: 10.1088/1742-6596/314/1/012017

Conference Contribution - Published proceedings: Full paper

Neugebauer, G., & Hennig, J. (2008). Thermodynamic description of inelastic collisions in general relativity. In H. Kleinert, R. T. Jantzen & R. Ruffini (Eds.), Proceedings of the Eleventh Marcel Grossmann Meeting (MG11) on Recent Developments in Theoretical and Experimental General Relativity, Gravitation and Relativistic Field Theories. (pp. 2228-2230). World Scientific. doi: 10.1142/9789812834300_0370

Conference Contribution - Published proceedings: Full paper

Hennig, J., Frauendiener, J., & Macedo, R. P. (2022). The conformally invariant wave equation near spacelike infinity on Minkowski, Schwarzschild and Kerr. Proceedings of the Australasian Society for General Relativity & Gravitation (ASGRG) 11th Australasian Conference on General Relativity & Gravitation. Retrieved from https://www.asgrg2021.org/

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2019). Smooth Gowdy-symmetric generalised Taub-NUT solutions in Einstein-Maxwell theory. Proceedings of the 22nd International Conference on General Relativity and Gravitation (GR22) and the 13th Edoardo Amaldi Conference on Gravitational Waves (AMALDI 13). Retrieved from https://gr22amaldi13.com

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2019). Solitons and black holes. Proceedings of the 10th Australasian Conference on General Relativity and Gravitation (ACGRG). Retrieved from https://sms.wgtn.ac.nz/Events/AotearoaACGRG10/

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2018). Gowdy-symmetric cosmological models in Einstein-Maxwell theory. Proceedings of the New Zealand Mathematical Society Colloquium. (pp. 22). Retrieved from http://nzmathsoc.org.nz/colloquium2018

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2016). The conformally invariant wave equation near the cylinder at spacelike infinity. Proceedings of the 21st International Conference on General Relativity and Gravitation (GR21). (pp. 81). Retrieved from http://www.gr21.org/

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2014). Soliton methods in general relativity. Proceedings of the 8th Australia and New Zealand Mathematics Convention (AustMS and NZMS). (pp. 115). Retrieved from http://www.austms2014.ms.unimelb.edu.au/

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2013). An exact smooth Gowdy-symmetric generalized Taub-NUT solution. Proceedings of the 20th International Conference on General Relativity (GR20) and Gravitation and 10th Amaldi Conference on Gravitational Waves (Amaldi10). Retrieved from http://gr20-amaldi10.edu.pl/index.php?id=50

Conference Contribution - Published proceedings: Abstract

Hennig, J. (2016, December). Fully pseudospectral time evolution and its application to physical problems. Verbal presentation at the New Zealand Mathematical Society Colloquium, Wellington, New Zealand.

Conference Contribution - Verbal presentation and other Conference outputs

Hennig, J. (2013, December). A generalisation of the Taub-NUT cosmological model in general relativity. Verbal presentation at the New Zealand Mathematical Society Colloquium, Tauranga, New Zealand.

Conference Contribution - Verbal presentation and other Conference outputs

Hennig, J. (2012, February). Smooth Gowdy symmetric generalized Taub-NUT solutions. Verbal presentation at the Sixth Australasian Conference on General Relativity and Gravitation, Queenstown, New Zealand.

Conference Contribution - Verbal presentation and other Conference outputs

Frauendiener, J., Hennig, J. (2018, March). How to reach infinity? CQG+ companion blog. Retrieved from https://cqgplus.com/2018/03/06/how-to-reach-infinity

Other Research Output

More publications...