Document Type

Article

Publication Date

3-3-2010

Publication Title

Astronomy and Astrophysics

Abstract

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

DOI

10.1051/0004-6361/200913959

Comments

F. Patat;N. L. J. Cox;J. Parrent;D. Branch

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