Title :
A dispersed fourier transform spectrometer with intrinsic optical metrology for stellar radial velocity measurements
Author :
Cenko, Andrew T. ; Meade, Jeff ; Behr, Bradford B. ; Hajian, Arsen R.
Author_Institution :
Syst. Design Eng., Univ. of Waterloo, Waterloo, ON, Canada
Abstract :
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.
Keywords :
Fourier transform spectrometers; astronomical instruments; astronomical techniques; measurement by laser beam; mirrors; stellar motion; velocity measurement; dFTS; dispersed Fourier transform spectrometer; laser based optical metrology system; mechanical metrology system; retroreflector absolute position; stellar radial velocity measurement; wavelength 470 nm to 540 nm; Autocorrelation; Dispersion; Extraterrestrial measurements; Fourier transforms; Instruments; Metrology; Optical interferometry; Optical recording; Spectroscopy; Velocity measurement;
Conference_Titel :
Optomechatronic Technologies, 2009. ISOT 2009. International Symposium on
Conference_Location :
Istanbul
Print_ISBN :
978-1-4244-4209-6
Electronic_ISBN :
978-1-4244-4210-2
DOI :
10.1109/ISOT.2009.5326064
