A dispersed fourier transform spectrometer with intrinsic optical metrology for stellar radial velocity measurements
- Resource Type
- Conference
- Authors
- Cenko, Andrew T.; Meade, Jeff; Behr, Bradford B.; Hajian, Arsen R.
- Source
- 2009 International Symposium on Optomechatronic Technologies Optomechatronic Technologies, 2009. ISOT 2009. International Symposium on. :271-276 Sep, 2009
- Subject
- Components, Circuits, Devices and Systems
Computing and Processing
Photonics and Electrooptics
Dispersion
Fourier transforms
Spectroscopy
Metrology
Velocity measurement
Instruments
Optical interferometry
Optical recording
Extraterrestrial measurements
Autocorrelation
- Language
Radial velocity (RV) of stellar targets were measured using a dispersed Fourier transform spectrometer (dFTS). The instrument used a laser based optical metrology system in cooperation with a mechanical metrology system to measure the absolute position of the retro-reflectors in the dFTS with a precision of 0.1 nm. The combined metrology system data allowed stellar RV measurements to be precise at the 10 m/s level, or about 0.1% relative error with respect to the RV amplitude. The dFTS instrument is well suited for precise RV measurements, and is less cumbersome to calibrate and operate than echelle spectrometers - a competing instrument for RV measurements of stellar targets.