Development of Iodine Cells for the Subaru HDS and the Okayama HIDES: I. Instrumentation and Performance of the Spectrographs
Abstract
We have developed iodine (I2) cells for the High Dispersion Spectrograph (HDS) on the Subaru telescope and for the HIgh Dispersion Echelle Spectrograph (HIDES) on the Okayama 1.88m reflector. The cell is put into a compact vacuum vessel, which fits into a small space behind the entrance slit of the HDS. The cell assembly is designed to minimize heat losses from the cell, which is heated during observations, to keep I2 vapor from condensation. The amount of I2 in the cell is determined to be best suited for radial-velocity measurements of solar-type stars. We also report on some performances of the HDS and HIDES as well as their instrumental profiles based on tests of our I2 cells. Lastly, we discuss future improvements of our instruments and data-analysis softwares for I2 observations, and also describe the scientific goals of our project.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- December 2002
- DOI:
- 10.1093/pasj/54.6.865
- Bibcode:
- 2002PASJ...54..865K
- Keywords:
-
- instrumentation: spectrographs;
- stars: oscillations;
- stars: planetary systems;
- techniques: radial velocities