CRIRES (VLT) Radial Velocity Sensitivity

[natski]

I know CRIRES is unstable right now but it should be back to full operation next year I hear. Does anyone know what it's limit of sensitivity will be for radial velcoity measurements (in m/s)?

 

[natski]

Just as a follow-up question, am I correct in saying that radial velcoity measurements are usually limited to late type stars (late F, G, K and M)?

 

[FTL_Diesel]

Usually, yes. Earlier stars typically spin faster, and this causes rotational broadening of the spectral lines. This makes it more difficult to fit to template spectra, and therefore more difficult to get accurate radial velocity measurements.