FORBIDDEN IRON LINES AND DUST DESTRUCTION IN SUPERNOVA REMNANT SHOCKS: THE CASE OF N49 IN THE LARGE MAGELLANIC CLOUD
Date
2016
Authors
Dopita, Michael
Seitenzahl, Ivo
Sutherland, Ralph
Vogt, Frédéric P.A.
Winkler, P. Frank
Blair, William P
Journal Title
Journal ISSN
Volume Title
Publisher
IOP Publishing
Abstract
We present the results of a complete integral-field survey of the bright supernova remnant (SNR) N49 in the Large Magellanic Cloud, obtained with the WiFeS instrument mounted on the ANU 2.3 m telescope at Siding Spring Observatory. From theoretical shock modeling with the new MAPPINGS 5.1 code, we have, for the first time, subjected the optical Fe emission line spectrum of an SNR to a detailed abundance and dynamical analysis covering eight separate stages of ionization. This allows us to derive the dust depletion factors as a function of ionization stage. We have shown that there is substantial (30%–90%) destruction of Fe-bearing dust grains in these fast shocks (v s ~ 250 km s−1), and we have confirmed that the dominant dust destruction occurs through the non-thermal sputtering and grain–grain collision mechanisms developed in a number of theoretical works
Description
Keywords
Citation
Collections
Source
The Astrophysical Journal
Type
Journal article
Book Title
Entity type
Access Statement
Open Access