3 Factors Influencing the Radial Velocity Measurement
3.1 Instrumental Characteristics
3.2.1 Stellar Rotational Velocity
3.2.3 Number Density of Spectral Lines
3.3 RV Precision across Spectral Types
3.3.1 Radial Velocities of High-mass Stars
3.3.2 Radial Velocities of Low-mass Stars
4 Simultaneous Wavelength Calibration
4.4.1 The Hydrogen Fluoride Cell
4.4.2 The Iodine Absorption Cell
4.4.3 Absorption Cells at Infrared Wavelengths
4.7 The RV Precision of Modern Spectrographs
5 Calculating the Doppler Shifts: The Cross-correlation Method
5.2.4 Mismatched Template and Stellar Spectra
5.3 CCF Detection of Spectroscopic Binaries
5.4 Fahlman–Glaspey Shift Detection
6 The Iodine Cell Method
6.2 Modeling the IP with the Iodine Cell Method
6.3 Influence of Changes in the IP
6.4 Ingredients for the Iodine Cell Method
6.5 Calculation of the Doppler Shift
6.6 Construction of an Iodine Cell
7 Frequency Analysis of Time Series Data
7.1 Introduction
7.2 The Discrete Fourier Transform
7.2.2 Visualizing Fourier Transforms
7.3 The Lomb–Scargle Periodogram
7.4 The Generalized Lomb–Scargle Periodogram
7.5 The Bayesian Generalized Lomb–Scargle Periodogram
7.6 Comparison of the Types of Periodograms
7.8 The Nyquist Frequency and Aliasing
7.10 Assessing the Statistical Significance