Multiband Observations of Type Ia Supernovae at Late Times

Details Multiband Observations of Type Ia Supernovae at Late Times Multiband Observations of Type Ia Supernovae at Late Times

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..342..217m&link_type=abstract

1604-2004: Supernovae as Cosmological Lighthouses, ASP Conference Series, Vol. 342, Proceedings of the conference held 15-19 Jun

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Scientific paper

For many years it has been recognised that observation of thermonuclear supernovae at late times is important since, as the expanding ejecta become optically thin, the supernova's core is revealed, promising direct information about the explosion mechanism. Spectroscopic examination allows us to determine the content and physical conditions of the innermost regions of the explosion. In particular, we can determine the total masses of different species, especially the iron group. In addition, the homologous expansion lets us use line profiles to examine the elemental distributions. The derived mass and distribution parameters can place constraints on explosion models. The faintness of Type Ia supernovae at late times has meant that such observational studies have been dominated by optical spectroscopy. However the increasing availability of sensitive instruments in other wavebands means that late-time studies of nearby SNeIa are now feasible from γ-rays to the mid-infrared.

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