Multiplexed High-Precision Radial Velocities: Searching for Hot Jupiters in Southern Open Star Clusters.

open clusters and associations: individual (NGC 2516;NGC 2422);techniques: radial velocities;techniques: spectroscopic;instrumentation: spectrographs;instrumentation: software;Astronomy;Science;Astronomy and Astrophysics

Bailey, III, John IraWhite, Russel J ;

University of Michigan

关键词: open clusters and associations: individual (NGC 2516;    NGC 2422);    techniques: radial velocities;    techniques: spectroscopic;    instrumentation: spectrographs;    instrumentation: software;    Astronomy;    Science;    Astronomy and Astrophysics;   

Others  :  https://deepblue.lib.umich.edu/bitstream/handle/2027.42/120653/baileyji_1.pdf?sequence=1&isAllowed=y

瑞士|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

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 125 photometric members of the young (141 Myr), nearby (346 pc) open star cluster NGC 2516 and 100 photometric members plus 15 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 [