# Dr. Jörg Hennig

**Room:** 1.65

**Phone:** +49 (0) 331 567 7249

**Fax:** +49 (0) 331 567 7298

**email:** (@aei.mpg.de) joerg.hennig

## Research

My scientific work at the Albert Einstein institute has two main focuses: (1) The application of pseudo-spectral methods for the numerical solution of hyperbolic PDEs and (2) The investigation of axisymmetric and stationary spacetimes with soliton methods and variational principles. In particular, I am interested in spacetimes with a central black hole and surrounding matter and in cosmological solutions.

## Publications

J. Hennig and G. Neugebauer,

*Collisions of rigidly rotating disks of dust in general relativity*,

Phys. Rev. D **74**, 064025 (2006), gr-qc/0606031.

J. Hennig, G. Neugebauer and M. Ansorg,

*Thermodynamic description of inelastic collisions in general relativity*,

ApJ ** 663**, 450 (2007), gr-qc/0701131.

G. Neugebauer and J. Hennig,

*Thermodynamic description of inelastic collisions in general relativity*,

Proceedings of the 11th Marcel Grossmann Meeting on General Relativity, Berlin, 2006, edited by H. Kleinert, R. T. Jantzen and R. Ruffini, (World Scientific, Singapore, 2008).

J. Hennig, M. Ansorg and C. Cederbaum,

*A universal inequality between the angular momentum and horizon area for axisymmetric and stationary black holes with surrounding matter*,

Class. Quantum Grav. **25**, 162002 (2008), arXiv:0805.4320.

M. Ansorg and J. Hennig,

* The inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter*,

Class. Quantum Grav. **25**, 222001 (2008), arXiv:0810.3998.

J. Hennig and M. Ansorg,

*A fully pseudospectral scheme for solving singular hyperbolic equations on conformally compactified space-times*,

Journal of Hyperbolic Differential Equations **6** No. 1, 161 (2009), arXiv:0801.1455.

J. Hennig, C. Cederbaum and M. Ansorg,

* A universal inequality for axisymmetric and stationary black holes with surrounding matter in the Einstein-Maxwell theory*,

Commun. Math. Phys. **293**, 449 (2010), arXiv:0812.2811.

M. Ansorg and J. Hennig,

*Inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter in Einstein-Maxwell theory*, Phys. Rev. Lett **102**, 221102 (2009), arXiv:0903.5405.

J. Hennig and M. Ansorg,

*The inner Cauchy horizon of axisymmetric and stationary black holes with surrounding matter in Einstein-Maxwell theory: study in terms of soliton methods*,

Ann. Henri Poincaré **10**, 1075 (2010), arXiv:0904.2071.

G. Neugebauer and J. Hennig,

*Non-existence of stationary two-black-hole configurations*,

Gen. Relativ. Grav. **41**, 2113 (2009), arXiv:0905.4179.

J. Hennig and M. Ansorg,

*Regularity of Cauchy horizons in S2xS1 Gowdy spacetimes*,

Class. Quantum Grav. **27**, 065010 (2010), arXiv:0911.1000.

J. Hennig and G. Neugebauer,

*Non-existence of stationary two-black-hole configurations*,

submitted to Proceedings of the 12th Marcel Grossmann Meeting on General Relativity, Paris, 2009, edited by T. Damour, R. T. Jantzen and R. Ruffini, (World Scientific, Singapore, 2010), arXiv:1002.1818.

M. Ansorg, J. Hennig and C. Cederbaum,

*Universal properties of distorted Kerr-Newman black holes*,

submitted, arXiv:1005.3128.

## About me

10/1998 – 11/2003: Study of physics at the Friedrich Schiller University, Jena

12/2003 – 04/2007: PhD Student at the Friedrich Schiller University, Jena PhD Thesis: Collision and Collapse Processes in General Relativity Supervisor: Prof. Dr. Gernot Neugebauer

since 04/2007: Postdoc at the AEI