Disentangling Multi-epoch Single-lined Binary Star Spectra to Reveal Interstellar Medium Features via MCMC
The MCMC-RVSD algorithm separates stellar lines from Diffuse Interstellar Bands (DIBs) in binary star spectra using orbital motion. It exploits the fact that stellar lines shift with radial velocity while DIBs do not, providing a template-independent way to measure interstellar features precisely.