Andreas Ernst  Welcome to my Homepage!

I am a postdoc in astronomy in the group of Prof. Dr. Rainer Spurzem and PD Dr. Andreas Just at the Astronomisches Rechen-Institut (ARI), which is now part of Center for Astronomy of the University of Heidelberg (ZAH). My PhD advisor was PD Dr. Andreas Just. My office is room W.E-03 located in the ARI "outpost" at Weberstr. 13, 69120 Heidelberg-Neuenheim.

My field of work is experimental stellar dynamics. The word "experimental" means, that I use computer experiments to study the dynamical evolution of stellar systems, where stars interact through gravity. Since my N-body simulations require a huge amount of computer power, I make use of the Beowulf clusters Hydra and Titan at the ARI and the super computers IBM Regatta p690+, Cray XD1 and IBM Blue Gene/L at the Research Center Jülich. Our group is also involved in the new GRID computing technologies (D-GRID, DEISA).

Contents:

Research interests; Publications; Mailing address; Links

Research interests:

Dynamics of star clusters in tidal fields Rotating star clusters (my diploma thesis work) Chaotic dynamics N-body simulations Einstein's relativity and beyond (my master project)

If you want to get an impression about my work, please have a look on my Movies and Plots Page.

Publications:

[1]	A. Ernst, On the Potential of a Point Charge in a Linearly Accelerated Frame, Master thesis, University of Massachusetts Dartmouth, June 2000 (.ps.gz file)
[2]	A. Ernst and J. P. Hsu, Generalized Coulomb Potential and Field Equations in Accelerated Frames Based on the Wu transformation, Chin. J. Phys. 39 (2), 122 (2001) (abstract and .pdf file)
[3]	A. Ernst and J. P. Hsu, First Proposal of the Universal Speed of Light by Voigt in 1887, Chin. J. Phys. 39 (3), 211 (2001) (abstract and .pdf file), appeared in: Jong-Ping Hsu and Yuan-Zhong Zhang, Lorentz and Poincaré Invariance - 100 Years of Relativity, World Scientific, Singapore (2001), p. 4
[4]	A. Ernst, On Hyperbolic Motion and Limiting Four-Dimensional Symmetry, Chin. J. Phys. 40 (6), 583 (2002) (abstract and .pdf file)
[5]	A. Ernst, N-body Models of Rotating Globular Clusters, Diploma thesis, University of Heidelberg, March 2005 (.ps.gz file, 4 MB)
[6]	R. Spurzem, M. Giersz, K. Takahashi, A. Ernst, Tidally limited star clusters - comparing gaseous models with other techniques, MNRAS 364, 948-960 (2005), arXiv:astro-ph/0412698
[7]	A. Ernst, P. Glaschke, J. Fiestas, A. Just, R. Spurzem, N-body Models of Rotating Globular Clusters, MNRAS 377, 465-479 (2007), arXiv:astro-ph/0702206
[8]	M. Riedel, Th. Eickermann, S. Habbinga, W. Frings, P. Gibbon, D. Mallmann, A. Streit, Th. Lippert, F. Wolf, W. Schiffmann, A. Ernst, R. Spurzem, W.E. Nagel, Computational Steering and Online Visualization of Scientific Applications on Future Peta-Scale HPC Systems within e-Science Infrastructures, Proceedings of 3rd IEEE International Conference on e-Science and Grid Computing, Bangalore, India, December 2007, IEEE Computer Society, ISBN 0-7695-3064-8, pp. 483-490
[9]	A. Ernst, A. Just, R. Spurzem, O. Porth, Escape from the vicinity of fractal basin boundaries of a star cluster, MNRAS 383, 897-906 (2008), arXiv:0710.4485
[10]	R. Spurzem, P. Berczik, I. Berentzen, D. Merritt, M. Preto, P. Amaro-Seoane, A. Borch, J. M. B. Downing, C. Eichhorn, A. Ernst, J. Fiestas, A. Just, C. Omarov, O. Porth, Formation and Evolution of Black Holes in Galactic Nuclei and Star Clusters, Proceedings of the NIC Symposium 2008, eds. G. Münster, D. Wolf, M. Kremer, Research Centre Jülich, February 2008, ISBN 978-3-9810843-5-1, 380 pages, pp. 43-50
[10]	A. Just, P. Berczik, M. I. Petrov, A. Ernst, Quantitative analysis of clumps in the tidal tails of star clusters, MNRAS 392, 969-981 (2009), arXiv:0808.3293
[11]	A. Ernst, Dissolution of Star Clusters in the Galaxy and its Center, PhD thesis, University of Heidelberg, April 2009 (link, 33 MB)
[12]	A. Ernst, A. Just, R. Spurzem, On the dissolution of star clusters in the Galactic centre. I. Circular orbits, MNRAS, 399, 141-156 (2009), arXiv:0906.4459

Buch:

Ich habe dieses Buch aus dem Englischen ins Deutsche übersetzt. Es behandelt eine breite Sicht relativistischer Physik.

Einsteins Relativitätstheorie und darüber hinaus - neue Symmetrieansätze by Jong-Ping Hsu, Tectum Verlag, Marburg (2007), 370 Seiten, ISBN 978-3-8288-9226-2

Sie können dieses Buch bestellen bei Amazon.de oder direkt bei Tectum Verlag.

Mailing address:

Links:

Sverre Aarseth, Institute of Astronomy Cambridge, author of nbody6,
Andreas Just, Astronomisches Rechen-Institut Heidelberg,
Rainer Spurzem, Astronomisches Rechen-Institut Heidelberg, author of nbody6++,
Jong-Ping Hsu, Physics Department, UMass Dartmouth,
IMPRS for Astronomy and Cosmic Physics at the Univ. of Heidelberg,
Teeminar schedule, our group's weekly meeting for discussion of a selected topic,
The nbody6++ Wiki,
Astrophotography by Bernhard Hubl,
My Notes on Gnuplot,
My Notes on Pine, my favourite email client,
Homepage of the Capella Carolina, my choir,
Homepage of the Monet-Quartett,
Sebastian Klug's project page (a good friend of mine),
Lars Hoss' Blog (another friend),
Glass Notes by Richard Guérin,
Fraktalikum.de, a collection of Newton fractals
My Webserver: leolib.dyndns.org (sometimes online)

Please send any comments to: .