Forbidden iron lines and dust destruction in supernova remnant shocks: The case of N49 in the large magellanic cloud

Michael A. Dopita; Ivo R. Seitenzahl; Ralph S. Sutherland; Frédéric P.A. Vogt; P. Frank Winkler; William P. Blair

doi:10.3847/0004-637X/826/2/150

Forbidden iron lines and dust destruction in supernova remnant shocks: The case of N49 in the large magellanic cloud

Michael A. Dopita, Ivo R. Seitenzahl, Ralph S. Sutherland, Frédéric P.A. Vogt, P. Frank Winkler, William P. Blair

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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.

Original language	English
Article number	150
Journal	Astrophysical Journal
Volume	826
Issue number	2
DOIs	https://doi.org/10.3847/0004-637X/826/2/150
Publication status	Published - 1 Aug 2016

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title = "Forbidden iron lines and dust destruction in supernova remnant shocks: The case of N49 in the large magellanic cloud",

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 (vs ∼ 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.",

keywords = "ISM: individual objects (N49), ISM: supernova remnants, Magellanic Clouds, dust, extinction, shock waves",

author = "Dopita, {Michael A.} and Seitenzahl, {Ivo R.} and Sutherland, {Ralph S.} and Vogt, {Fr{\'e}d{\'e}ric P.A.} and Winkler, {P. Frank} and Blair, {William P.}",

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T1 - Forbidden iron lines and dust destruction in supernova remnant shocks

T2 - The case of N49 in the large magellanic cloud

AU - Dopita, Michael A.

AU - Seitenzahl, Ivo R.

AU - Sutherland, Ralph S.

AU - Vogt, Frédéric P.A.

AU - Winkler, P. Frank

AU - Blair, William P.

PY - 2016/8/1

Y1 - 2016/8/1

N2 - 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 (vs ∼ 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.

AB - 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 (vs ∼ 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.

KW - ISM: individual objects (N49)

KW - ISM: supernova remnants

KW - Magellanic Clouds

KW - dust, extinction

KW - shock waves

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U2 - 10.3847/0004-637X/826/2/150

DO - 10.3847/0004-637X/826/2/150

M3 - Article

SN - 0004-637X

VL - 826

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 150

ER -

Forbidden iron lines and dust destruction in supernova remnant shocks: The case of N49 in the large magellanic cloud

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