Europlanet Science Congress 2022
Palacio de Congresos de Granada, Spain
18 – 23 September 2022
Europlanet Science Congress 2022
Palacio de Congresos de Granada, Spain
18 September – 23 September 2022
EPSC Abstracts
Vol. 16, EPSC2022-90, 2022
Europlanet Science Congress 2022
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

An update on MAROON-X

Rafael Luque1 and the MAROON-X instrument team*
Rafael Luque and the MAROON-X instrument team
  • 1University of Chicago, Department of Astronomy and Astrophysics, Chicago, United States of America (
  • *A full list of authors appears at the end of the abstract

MAROON-X is a red optical EPRV spectrograph on the 8m Gemini North telescope that has been in regular science operations for the last two years. Depending on the amount of time available and the interests of the organizers, I could report on the current performance of the instrument, science results, future plans, and/or lessons learned. In terms of performance, the instrument continues to deliver radial velocity precision at the sub 30 cm/s level. We have found that many field M dwarfs have activity levels well below 1 m/s on short timescales, thus opening up the possibility of detecting very small planets on orbits out to the distance of the circumstellar habitable zone with intensive observational campaigns. I will report science results from a large, homogeneous follow-up program for TESS's M dwarfs, a blind search for planets around the nearest M dwarfs, and a selection of results from community use of the instrument. We will be upgrading the instrument with a laser frequency comb to improve the long-term calibration later this year. We also have the approval to install a solar telescope feed for the instrument. A key lesson learned is the importance of continual assessment and adjustment of the calibration (i.e., don't "set it and forget it") in the EPRV regime.

MAROON-X instrument team:

Jacob Bean, Andreas Seifahrt, David Kasper, Madison Brady

How to cite: Luque, R. and the MAROON-X instrument team: An update on MAROON-X, Europlanet Science Congress 2022, Granada, Spain, 18–23 Sep 2022, EPSC2022-90,, 2022.


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