Astronomy and Astrophysics
In this work we explore the possibility of using the fast expansion of a Type Ia supernova photosphere to detect extra-galactic ISM column density variations on spatial scales of ∼100 AU on time scales of a few months. We constructed a simple model which describes the expansion of the photodisk and the effects of a patchy interstellar cloud on the observed equivalent width of Nai D lines. Using this model we derived the behavior of the equivalent width as a function of time, spatial scale and amplitude of the column density fluctuation
Patat, F.; Cox, N. L. J.; Parrent, J.; and Branch, D., "Studying the Small Scale ISM Structure with Supernovae" (2010). Open Dartmouth: Faculty Open Access Articles. 530.