FORBIDDEN IRON LINES AND DUST DESTRUCTION IN SUPERNOVA REMNANT SHOCKS: THE CASE OF N49 IN THE LARGE MAGELLANIC CLOUD

Journal Article · Mon Aug 01 00:00:00 EDT 2016 · Astrophysical Journal

DOI:https://doi.org/10.3847/0004-637X/826/2/150· OSTI ID:22679617

Dopita, Michael A.; Seitenzahl, Ivo R.; Sutherland, Ralph S. ^[1]; Vogt, Frédéric P. A. ^[2]; Winkler, P. Frank ^[3]

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1. Research School of Astronomy and Astrophysics, Australian National University, Canberra, ACT 2611 (Australia)
2. ESO—European Southern Observatory, Av. Alonso de Córdova 3107, 7630355 Vitacura Santiago (Chile)
3. Physics Department, Middlebury College, Middlebury, VT 05753 (United States)

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{sub s} ∼ 250 km s{sup −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.

• OSTI ID: 22679617
• Journal Information: Astrophysical Journal, Vol. 826, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
COLLISIONS
COSMIC DUST
ELEMENT ABUNDANCE
EMISSION
IONIZATION
IRON
MAGELLANIC CLOUDS
SHOCK WAVES
SIMULATION
SPECTRA
SUPERNOVA REMNANTS
TELESCOPES