Tobias Feger

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About

Tobias Feger is an optical instrumentation specialist whose work is central to the development of ultra-compact, high-resolution spectrographs for exoplanet science and asteroseismology. His primary contribution is the design and realization of the RHEA (Replicable High-resolution Exoplanet and Asteroseismology) spectrograph, a groundbreaking instrument that operates at the diffraction limit using single-mode fiber input. This innovative approach dramatically reduces the size of the spectrograph while maintaining high spectral resolution, making it suitable for deployment on small 0.2–0.4 m class robotic telescopes. Feger’s work enables long-term, dedicated exoplanet monitoring campaigns that would be impractical with larger, oversubscribed facilities. His 2014 paper detailing the RHEA opto-mechanical design has accumulated 16 citations, while his 2016 follow-up on performance and future developments has garnered 9 citations. By demonstrating that a replicable, cost-effective spectrograph can achieve the precision needed for radial velocity measurements, Feger has helped democratize high-resolution spectroscopy, paving the way for networked telescope arrays capable of sustained exoplanet discovery and stellar characterization.