Neutral Na in Cometary Tails as a Remnant of Early Aqueous Alteration
Y. Ellinger, F. Pauzat, O. Mousis, A. Guilbert-Lepoutre, F. Leblanc, M. Ali-Dib, M. Doronin, E. Zicler, and A. Doressoundiram The Astrophysical Journal Letters Volume 801 Number 2 ApJ 801 L30. doi:10.1088/2041-8205/801/2/L30 LINK