Exocomets of ${\hat{I}}^2$ Pictoris I: Exocomet destruction, sodium and disk line variability in 17 years of HARPS observations

H. J. Hoeijmakers, K. P. Jaworska, B. Prinoth

The young ${\hat{I}}^2$ Pictoris system has been monitored with high-resolution optical spectrographs for decades. These observations have revealed strongly variable absorption in the Ca II…