As my loyal reader knows, Lily Zhao (Yale) is looking at whether spectral shape changes predict radial-velocity mistakes in extreme-precision radial-velocity projects. She finds that they do! This time in simulated spectra, in which there are cool, tiny star spots on the surface of a rotating star. This gives us (Zhao, Megan Bedell and me) hope that we can apply this to real data, if we can model the telluric interference accurately enough. My job on this project is to show that what we are doing is an approximation to doppler spectroscopic imaging.
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