Marcelo Aron Fetzner Keniger

Research

I am a final-year PhD student in the Astronomy and Astrophysics group at the University of Warwick. My supervisors are David Armstrong and Matteo Brogi. My research involves developing AstroclimesLink opens in a new window, a synthetic telluric transmission algorithm that is tailored for two main applications: (1) measure the abundance of greenhouse gases in the Earth's atmosphere in a novel approach that uses astronomical spectroscopic observations; (2) remove telluric lines from stellar spectra taken with high resolution ground based observations.

More recently, I have been focusing on the study of exoplanet atmospheres, specifically in detecting chemical species using high resolution spectroscopy and how different methods to remove telluric and stellar lines, such as Astroclimes and Principal Component Analysis (PCA), affect the detection of an exoplanet atmospheric signal.

I got my MSc in Astronomy from Aarhus University, Denmark, where I was supervised by Simon Albrecht and worked alongside Emil Knudstrup. My thesis involved analysing the Rossiter-McLaughlin effect in selected systems and trying to obtain improved obliquity measurements by employing what is historically known as the Doppler tomography or Doppler shadow method.

Besides that, I'm also interested in detection and characterisation of exoplanets, the study of Solar System objects, climate science and astrobiology.

Full publication list available hereLink opens in a new window, updated November 2025.

Conferences

Teaching

• Graduate Teaching Assistant (GTA) for Physics Programming Workshop (PX159): Academic years 2022/2023, 2023/2024, 2024/2025 and 2025/2026
• GTA for Astrophysics Laboratory III (PX451): Academic years 2022/2023 and 2023/2024

Outreach

• Planetarium manager (2023-present): I am one of the planetarium managers for the University of Warwick inflatable planetarium. We take the planetarium to primary schools to carry out shows for the children. On occasion, we also host visits to the University and the Marsh Observatory. As planetarium manager, I handle all of the administrative part, which includes processing schools' requests, gathering volunteers, sorting out transport of the equipment to the schools, and any other matter involving the planetarium.
• Coding with Sophie: volunteer for the Coding with Sophie project. Carried out 3 sessions at the Sidney Stringer Primary School.
• STEM partner for Tudor Grange Academy Redditch Weather Balloon project: acted as STEM partner for a Royal Society grant application to carry out a weather balloon launch at the Tudor Grange Academy Redditch. Contact teacher at the school was Mr. Ben Wilkes.
• Big Bang Fair 2025: attended the Big Bang Fair 2025 as a volunteer for the University of Warwick Physics booth, specifically helping out the booth with the "superconductor train" experiment.