| The Michigan/Magellan Fiber System enables a multiplexed, precision radial velocity (pRV) survey of open star clusters for warm- and hot-Jupiter exoplanetary companions while simultaneously allowing detailed study of stellar properties. To accomplish this, I created an automated control system that enables users to rapidly reconfigure M2FS for different scientific programs and developed a novel mechanism to improve its maximum resolving power from ∼20,000 to ∼60,000. I report the results of a survey of 126 photometric members of the young (141 Myr), nearby (346 pc) open star cluster NGC 2516 and 100 photometric members plus 25 candidate members of the young (72 Myr), nearby (491 pc) open cluster NGC 2422 (M 47). I developed a prescription to spectroscopically measure Teff (+/-30 K), [Fe/H] and [alpha/Fe] (+/-0.02 dex), and vr sin(i) (+/-0.3 km/s). Observations of a reference star show my approach with M2FS can achieve RV precisions of 20¨C60 m/s for up to 128 stars simultaneously. RV measurements enabled memberships lists to be confirmed; 41 claimed members were rejected in NGC 2516 and 52 in NGC 2422. Twelve new members of NGC 2422 are identified, as is a separate RV clustering of 11 giant-like stars in the field of NGC 2422. I propose these giant-like stars are members of a background Milky Way halo stream. I report the discovery of 8 double-lined spectroscopic binaries (SBs) and used pRV measurements spanning 386 days to identify 54 single-lined SBs, 44 of which are new discoveries (16 and 9 as members in NGC 2516 or NGC 2422). I also identify 53 stars which exhibit significant low-amplitude variability after accounting for average levels of stellar jitter. Finally, I identify 8 low-amplitude RV variable stars as candidate hot-Jupiter hosts worth follow-up investigation. |
