Revisiting ε Eridani with NEID: Identifying New Activity-Sensitive Lines in a Young K Dwarf Star

Recent improvements in the sensitivity and precision of the radial velocity (RV) method for exoplanets have brought it close, but not quite to, the threshold (\sim10 cm/s) required to detect Earth-mass and other potentially habitable planets around Sun-like stars. Stellar activity-driven noise in RV measurements remains a significant hurdle to... Show more