Abstract
Eccentric orbits can be decomposed into a series of sine curves which affects how the false alarm probability is computed when using traditional periodograms on radial-velocity data. Here we show that a candidate exoplanet orbiting the M dwarf GJ 9404, identified by the HADES survey using data from the HARPS-N spectrograph, is in fact a bona fide planet on a highly eccentric orbit. Far from a candidate, GJ 9404b is detected with a high confidence. We reach our conclusion using two methods that assume Keplerian functions rather than sines to compute a detection probability, a Bayes Factor, and the false-inclusion probability periodogram. We compute these using nested sampling with kima.
Original language | English |
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Article number | 175 |
Journal | Research Notes of the AAS |
Volume | 7 |
Issue number | 8 |
Early online date | 16 Aug 2023 |
DOIs | |
Publication status | Published - 16 Aug 2023 |
Keywords
- Keplerian orbit
- Radial velocity
- Nested sampling
- Exoplanets