Homepage of Enrico Gerlach

Table of contents

1. 1. Main research interests
   2. Scientific career
   3. teaching
   4. Publications
      1. 2021
      2. 2020
      3. 2016
      4. 2015
      5. 2014
      6. 2013
      7. 2012
      8. 2011
      9. 2010
      10. 2009
      11. 2008
   5. presentations
      1. 2014
      2. 2013
      3. 2012
      4. 2011
      5. 2010
      6. 2009
      7. 2008
      8. 2007
   6. Poster
      1. 2009
   7. Referee for

Main research interests

Earth rotation, numerical integration, chaos detection methods, exoplanets, nonlinear dynamical systems, astrometry of minor planets

Scientific career

• 1997-2001
  Study of geodesy at HTW Dresden

• 2001
  diploma thesis: "Die Linien und Geoglyphen in der Pampa von Nasca - Astronomische Untersuchungen zur Überprüfung der Kalendertheorie"

• 2001-2003
  executive engineer of the astro-geodetic field work at the border demarcation project between the kingdom of Saudi Arabia and the republic Yemen

• 2003-2008
  researcher for the DFG project "Chaos and resonances in the Edgeworth-Kuiper belt"

• 2008
  Graduation. Thesis: Stabilitätsuntersuchungen an Asteroidenbahnen in ausgewählten Bahnresonanzen des Edgeworth-Kuiper-Gürtels

• since october 2008
  scientific staff member at the Lohrmann observatory

teaching

• Basic numerical computations in C (programming excercise, bachelor level): 2004-2006
• Physics I & II for geodesy (excercises at bachelor level): 2011 - today
• Practical astronomical observations (excercises for astronomy teachers): 2012 - today
• Earth rotation (lectures and exercises, master level): 2013 - today
• Astronomical reference systems (lecture for bachelor): SS 2014
• scientific supervisor of various bachelor theses

Publications

2021

• Gaia Collaboration, Brown, A.G.A., et al. (2021) Gaia Early Data Release 3. Summary of the contents and survey properties, Astronomy and Astrophysics, 649, A1, available online here and as arXiv-preprint
• Lindegren, L. et al. (2021) Gaia Early Data Release 3. The astrometric solution, Astronomy and Astrophysics, 649, A2, available online here and as arXiv-preprint
• L. Lindegren, U. Bastian, M. Biermann, A. Bombrun, A. de Torres, E. Gerlach, R. Geyer, J. Hernández, T. Hilger, D. Hobbs, S.A. Klioner, U. Lammers, P.J. McMillan, M. Ramos-Lerate, H. Steidelmüller, C.A. Stephenson, F. van Leeuwen (2021): Gaia Early Data Release 3: Parallax bias versus magnitude, colour, and position, Astronomy and Astrophysics, 649, A4, available online here  and as arXiv-preprint
• Gaia Collaboration, S. Klioner et al. (2021): Gaia Early Data Release 3. Acceleration of the solar system from Gaia astrometry, Astronomy and Astrophysics, 649, A9, available online here and as arXiv-preprint
• Gaia Collaboration, R.L. Smart et al. (2021): Gaia Early Data Release 3. The Gaia Catalogue of Nearby Stars, Astronomy and Astrophysics, 649, A6 available online here and as arXiv-preprint
• Gaia Collaboration: X. Luri et al. (2021): Gaia Early Data Release 3. Structure and properties of the Magellanic Clouds, Astronomy and Astrophysics, 649, A7, available online here and as arXiv-preprint
• Gaia Collaboration, T. Antoja et al. (2021): Gaia Early Data Release 3: The Galactic anticentre, Astronomy and Astrophysics, 649, A8, available online here and as arXiv-preprint

2020

• Hillebrand M., Many Manda B., Kalosakas G., Gerlach E. & Skokos Ch. (2020): Chaotic dynamics of graphene and graphene nanoribbons, Chaos, 30, 063150, available online here

2016

• Anglada-Escudé, G., Tuomi, M., Arriagada, P., Zechmeister, M., Jenkins, J. S., Ofir, A., Dreizler, S., Gerlach, E., Marvin, C. J., Reiners, A., Jeffers, S. V., Butler, R. Paul, Vogt, S. S., Amado, P. J., Rodríguez-López, C. , Berdiñas, Z. M., Morin, J., Crane, J. D., Shectman, S. A., Díaz, M. R., Sarmiento, L. F., Jones, H. R. A. (2016): No Evidence for Activity Correlations in the radial Velocities of Kapteyn's Star, The Astrophysical Journal, 830, 74, available online here.
• Gerlach, E., Meichsner, J., Skokos, H (2015): On the symplectic integration of the discrete nonlinear Schrödinger equation with disorder, The European Physical Journal Special Topics, 225(6), 1103-1114, available online as arXiv-preprint

2015

• Thuillot, W. et al. (2015): The astrometric Gaia-FUN-SSO observation campaign of 99 942 Apophis, A&A, 583, A59, available online here or as arXiv-preprint

2014

• Eggl, S., Gerlach, E., Böttger, S., Thuillot, W., Baransky, A., Devyatkin, A.V., Bashakova, E.A., Rusov, S.A., Gorshanov, D.L., Shulga, O.V., Sybiryakova, Y., Kozyryev, Y., Kulichenko, N. Vovk, V. (2014): Gaia-FUN-SSO: Triangulation Observations of 2014 HQ₁₂₄, Proceedings of the International Workshop held 24-26 November, 2014 at the Paris Observatory, available online here.
• Skokos, H., Gerlach, E., Bodyfelt, J.D., Papamikos, G., Eggl, S. (2014): High order three part split symplectic integrators: Efficient techniques for the long time simulation of the disordered discrete nonlinear Schrödinger equation, Physics Letters A, vol. 378, Issues 26-27, Pages 1809-1815, available online here.
• Anglada-Escudé, G., Arriagada, P., Tuomi, M., Zechmeister, M., Jenkins, J.S., Ofir, A., Dreizler, S., Gerlach, E., Marvin, C.J., Reiners, A., Jeffers, S.V., Butler, R.P., Vogt, S.S. Amado, P.J., Rodríguez-López, C., Berdiñas, Z.S., Morin, J., Crane, J.D., Shectman, S.A., Thompson, I.B., Díaz, M., Rivera, E., Sarmiento, L.F., Jones H.R.A. (2014): Two planets around Kapteyn's star : a cold and a temperate super-Earth orbiting the nearest halo red-dwarf, MNRAS, vol.443, Issue 1, p.L89-L93, also available as arXiv-preprint.

2013

• Anglada-Escude, G., Tuomi, M., Gerlach, E., Barnes, R., Heller, R., Jenkins, J.S., Wende, S., Vogt, S.S., Butler, P.R., Reiners, A., Jones, H.R.R. (2013): A dynamically-packed planetary system around GJ667C with three super-Earths in its habitable zone, A&A, vol. 556, A126, (pdf).
• Gerlach E., Eggl S., Skokos Ch., Bodyfelt J.D., Papamikos G. (2013): High order three part split symplectic integration schemes, in "Proceedings of the 10th HSTAM International Congress on Mechanics", also available as arXiv-preprint.
• Tuomi, M., Anglada-Escude, G., Gerlach, E., Jones, H.R.R., Reiners, A., Rivera, E.J., Vogt, S.S., Butler, P.R. (2013): Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307, A&A, vol. 549, A48, also available as arXiv-preprint.

2012

• Gerlach, E., Klioner, S., Soffel, M. (2012): Consistent Modeling of Geodetic Precession in Earth Rotation, International Association of Geodesy Symposia, 137, pp. 307–311
• Gerlach, E., Haghighipour, N. (2012): Can GJ 876 host four planets in resonance?, Cel. Mech. Dyn. Astron., 117, issue 1, 35-47, also available as online first.
• Gerlach, E., Eggl, S., Skokos, Ch. (2011): Efficient integration of the variational equations of multi-dimensional Hamiltonian systems: Application to the Fermi-Pasta-Ulam lattice, Int. J. Bifurcation Chaos, vol. 22, issue 9, (pdf).

2011

• Gerlach, E., Skokos, C. (2012): Comparing the efficiency of numerical techniques for the integration of variational equations, Discrete and Continuous Dynamical Systems- Series A, (SUPPL.), pp. 475–484

2010

• Soffel, M.H., Klioner, S.A., Gerlach, E. (2010): About the MacCullagh Relations in Relativity, In: New Challenges for reference systems and numerical standards in astronomy, N. Capitaine (ed.), Proc. of Les Journées'2010, Paris, 255-257.
• Skokos, Ch., Gerlach, E. (2010): Numerical integration of variational equations, Phys. Rev. E, 82, 036704, also available as arXiv-preprint.
• Gerlach, E., Skokos, Ch. (2010): Comparing the efficiency of numerical techniques for the integration of variational equations, Proceedings of the 8th AIMS International Conference on Dynamical Systems 475-484, (pdf.)

2009

• Klioner, S.A., Gerlach, E., Soffel, M. (2009): Relativistic aspects of rotational motion of celestial bodies. In: Relativity in Fundamental Astronomy, Proc. of the IAU Symposium 261, S. Klioner, K. Seidelmann, M. Soffel(eds.) Cambridge University Press, Cambridge, also available as arXiv-preprint.
• Gerlach, E., Klioner, S., Soffel, M. (2009): Consistent modelling of the geodetic precession in Earth rotation, VII Hotine-Marussi Symposium, Rome 6-10 July 2009, IAG Series, Springer, Vol. 137, also available as arXiv-preprint.

2008

• Sidlichovsky, M., Gerlach, E. (2008): Secular evolution of exoplanetary systems and close encounters, Exoplanets: Detection, Formation and Dynamics, Proceedings of the International Astronomical Union, IAU Symposium, Volume 249, p. 479-484.
• Gerlach, E. (2008): On the Numerical Computability of Asteroidal Lyapunov Times, Proceedings of the International Conference on the Dynamics of Celestial Bodies, Lithoro 23 – 26 June 2008, p. 125-128, also available as arXiv-preprint.

presentations

2014

• 15.04.; Lehrerfortbildung des Freistaates Sachsen, Max Planck Institute for the Physics of Complex Systems, Dresden, Germany; "Kosmische Kleinkörper in unserem Sonnensystem".

2013

• 19.06.; Methods of Chaos Detection and Predictability: Theory and Applications, Max Planck Institute for the Physics of Complex Systems, Dresden, Germany; "On the numerical integration of ariational equations".

2012

• 09.10.; Geodätische Woche, Hannover, Germany; "Eine neue numerische Theorie von Präzession und Nutation der Erde".
• 30.08.; IAU General Assembly - Comission 19, Beijing, China; "A new theory of precession and nutation for the Earth".
• 28.08.; IAU General Assembly - Joint Discussion 7, Beijing, China; "A new numerical theory of Earth rotation".
• 22.02.; Meeting of research group FOR 584, Frankfurt/M., Germany; "Statusreport P3: Die elastische Erde".

2011

• 24.02.; Meeting of research group FOR 584, Vienna, Austria; "Geodätische Präzession für Körper des Sonnensystems; Stand der Präzessions-/Nutationstheorie einer nicht-starren Erde".
• 24.03.: 8th Alexander von Humboldt Colloquium for Celestial Mechanic, Bad Hofgastein, Austria;"On the numerical integration of variational equations"

2010

• 13.01.; Geodätisches Doktorandenseminar, TU Dresden; "Eine relativistische Theorie der Präzession und Nutation einer starren Erde".
• 12.03.; Lohrmann seminar; "Different ways to approach the non-rigid Earth".
• 22.03.; Meeting of research group FOR 584, Berlin; "Parameterwahl für das relativistische Erdmodell".
• 04.05.; EGU General Assembly, Vienna; "A consistent relativistic theory of Earth rotation".
• 10.09.; Lohrmann seminar; "The numerical integration of variational equations".

2009

• 23.10.; Lohrmann seminar; "Modelling the rotational motion of a rigid Earth in a relativistic framework - An overview".
• 29.10.; Meeting of research group FOR 584, Munich; "Projekt P3 - Relativistische Theorie der Präzessions- und Nutationsbewegung einer starren Erde".

2008

• 17.01.; Astrodynamic seminar, University of Vienna; "Säkulare Dynamik von Exoplaneten und nahe Begegnungen".
• 11.06.; Geodätisches Doktorandenforum, TU Dresden; "Chaos und Resonanzen in der Himmelsmechanik".
• 24.10.; Verteidigung der Dissertation, TU Dresden; "Stabilitätsuntersuchungen an Asteroidenbahnen in ausgewählten Bahnresonanzen des Edgeworth-Kuiper-Gürtels".

2007

• 19.01.; Lohrmann seminar; "Numerical simulation of chaotic systems in celestial mechanics".
• 23.02.; Lohrmann seminar; "Symplectic integration methods - An overview".
• 26.10.; EXOPLANETS: Detection, Formation and Dynamics, IAU Symposium No. 249, Oct. 22-26, 2007, Suzhou, China; "Secular evolution of exoplanetary systems and close encounters".

Poster

2009

• Klioner, S., Soffel, M., Gerlach, E.; EGU General Assembly 2009, Vienna; "Consistent modelling of the geodetic precession in Earth rotation".
• Gerlach, E., Klioner, S., Soffel, M.; VII Hotine-Marussi Symposium, Rome; "Consistent modelling of the geodetic precession in Earth rotation".
• S. Klioner, E. Gerlach, M. Soffel; CELMEC V, Viterbo; "Consistent relativistic theory of Earth rotation".
• Gerlach, E., Skokos, H.; CELMEC V, Viterbo; "Some aspects of the numerical integration of variational equations".

Referee for

• Applied Numerical Mathematics
• Artificial Satellites, Journal of Planetary Geodesy
• Celestial Mechanics and Dynamical Astronomy
• Communications in Nonlinear Science and Numerical Simulation
• International Journal of Bifurcation and Chaos