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Staff Record
Research Associate

Christoph Bergmann





Research Associate (Exoplanetary Science)


Nov. 2015 – Ph.D. in Astronomy, University of Canterbury, New Zealand

July 2010 – Dipl.-Phys. (~MSc in Physics), University of Heidelberg, Germany

Research Interests: 

I am a postdoctoral research associate working in the exoplanet group at UNSW with Prof Chris Tinney. My main research interests are focused on the detection and characterization of extrasolar planets, in particular with the radial velocity method. At the moment, I am mostly working on the development of the data reduction pipeline for the new Veloce spectrograph (https://newt.phys.unsw.edu.au/~cgt/Veloce/Veloce.html), which is currently being installed at the AAT. Once this instrument is up and running, we aim to detect and/or confirm planets or planet candidates (eg as identified by NASA's TESS mission). With an expected precision better than 1m/s, Earth-mass planets or Super-Earths in the habitable zone around cool stars will be within our reach!

I am also interested in other aspects of exoplanetary science (eg extrasolar planets orbiting giant stars and/or binary stars), high-resolution spectroscopy, as well as data analysis techniques in general.

Selected Publications: 

Refereed Journal Articles

  • Bedding, T. R., Murphy, S. J., Hey, D. R., …, Bergmann, C., …, et al. (+30 co-authors), “Regular sequences of pulsation overtones in young intermediate-mass stars”, submitted to Nature 11/2019
  • Huber, D., Chaplin, W. J., Chontos, A., … , Bergmann, C., et al. (+137 co-authors), “A Hot Saturn Orbiting An Oscillating Late Subgiant Discovered by TESS”, 2019, AJ, 157, 6, https://doi.org/10.3847/1538-3881/ab1488
  • Wittenmyer, R. A., Bergmann, C., Horner, J., Clark, J., Kane, S. R., “Truly eccentric. II. When can two circular planets mimic a single eccentric orbit?”, 2019, MNRAS, 484, 4230, https://doi.org/10.1093/mnras/stz236
  • Ramm, D. J., Nelson, B. E., Endl, M., Hearnshaw, J. B., Wittenmyer, R. A., Gunn, F., Bergmann, C., Kilmartin, P., Brogt, E., “The conjectured S-type retrograde planet in nu Octantis: more evidence including four years of iodine-cell radial velocities”, 2016, MNRAS, 460, 3706, https://doi.org/10.1093/mnras/stw1106
  • Wittenmyer, R. A., Butler, R. P., Wang, L., Bergmann, C., Salter, G. S., Tinney, G. C. & Johnson, J. A., “The Pan-Pacific Planet Search III: Five companions orbiting giant stars”, 2016, MNRAS, 455, 1398, https://doi.org/10.1093/mnras/stv2396
  • Reffert, S., Bergmann, C., Quirrenbach, A., Trifonov, T. & Künstler, A., “Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity”, 2015, A&A, 574, 116, https://doi.org/10.1051/0004-6361/201322360
  • Bergmann, C., Endl, M., Hearnshaw, J. B., Wittenmyer, R. A. & Wright, D. J., “Searching for Earth-mass planets around α Centauri: precise radial velocities from contaminated spectra”, 2015, Int. Journal of Astrobiology, 14, 173, https://doi.org/10.1017/S1473550414000317
  • Endl, M., Bergmann, C., Hearnshaw, J., Barnes, S. I., Wittenmyer, R. A., Ramm, D., Kilmartin, P., Gunn, F. & Brogt, E., “The Mt John University Observatory search for Earth-mass planets in the habitable zone of α Centauri”, 2015, Int. Journal of Astrobiology, 14, 305, https://doi.org/10.1017/S1473550414000081
  • Kane, S. R., Reffert, S., Henry, G. W., Fischer, D., Schwab, C., Clubb, K. I. & Bergmann, C., “On the Transit Potential of the Planet Orbiting Iota Draconis”, 2010, ApJ, 720, 1644, https://doi.org/10.1088/0004-637X/720/2/1644


Conference Proceedings

  • Gilbert, J., Bergmann, C., Bloxham, G., et al. (+24 co-authors), “Veloce Rosso: Australia's new precision radial velocity spectrograph”, 2018, Proc. SPIE, 107020, https://doi.org/10.1117/12.2312399
  • Quirrenbach, A., Reffert, S., Trifonov, T., Bergmann, C. & Schwab, C., 2015, “Planets around Giant Stars: Results from the Lick Survey”, in AAS/Division for Extreme Solar Systems Abstracts, vol. 3, p. 502, https://ui.adsabs.harvard.edu/#abs/2015ESS.....350201Q/abstract
  • Bergmann, C., Endl, M., Hearnshaw, J. & Wittenmyer, R., 2015, “Searching for Earth-mass planets around α Centauri: obtaining precise radial velocities from composite spectra”, in Rucinski, S. M., Torres, G., and Zejda, M., editors, ASP Conference Series, vol. 496, p. 348,
  • Wittenmyer, R. A., Endl, M., Bergmann, C., Hearnshaw, J., Barnes, S. I. & Wright, D., 2014, “A Campaign for the Detection of Earth-Mass Planets in the Habitable Zone of Alpha Centauri”, in Haghighipour, N., editor, Proceedings IAU Symposium 293, p.58, 
  • Quirrenbach, A., Reffert, S. & Bergmann, C., “Planets around Giant Stars”, 2011, in Schuh, S., Drechsel, H., and Heber, U., editors, AIP Conference Series, vol. 1331, p. 102, https://doi.org/10.1063/1.3556189