Granulation on a quiet K dwarf: HD 166620 I. Spectral signatures as a function of line-formation temperature

Ancy Anna John, Khaled Al Moulla, Niamh K. O'Sullivan +14

As Radial velocity (RV) spectrographs reach unprecedented precision and stability below 1 m/s, the challenge of granulation in the context of exoplanet detection has intensified. D…