Large-area [Fe II] Line Mapping of the Supernova Remnant IC443 with the IRSF/SIRIUS

Abstract

We present the result of near-infrared (near-IR) [Fe II] line mapping of the supernova remnant IC443 with the IRSF/SIRIUS, using the two narrow-band filters tuned for the [Fe II] 1.257 micron and [Fe II] 1.644 micron lines. Covering a large area of 30' x 35', our observations reveal that [Fe II] filamentary structures exist all over the remnant, not only in an ionic shock shell, but also in a molecular shock shell and a central region inside the shells. With the two [Fe II] lines, we performed corrections for dust extinction to derive the intrinsic line intensities. We also obtained the intensities of thermal emission from the warm dust associated with IC443, using the far- and mid-IR images taken with AKARI and Spitzer, respectively. As a result, we find that the [Fe II] line emission relative to the dust emission notably enhances in the inner central region. We discuss causes of the enhanced [Fe II] line emission, estimating the Fe+ and dust masses.

18 pages, 3 figures, accepted for publication in ApJ Letters

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• Supernova Remnants Interacting with Molecular Clouds: X-ray and Gamma-ray Signatures
• The turbulent destruction of clouds - III. Three dimensional adiabatic shock-cloud simulations
• Toward the Understanding of the Physical Origin of Recombining Plasma in the Supernova Remnant IC 443
• Near-infrared [Fe II] and H${}_2$ Emission-line Study of Galactic Supernova Remnants in the First Quadrant
• Near-infrared [FeII] and H2 line mapping of the supernova remnant IC443 with the IRSF/SIRIUS
• QUIJOTE scientific results -- V. The microwave intensity and polarisation spectra of the Galactic regions W49, W51 and IC443
• Dust Mass Associated with the Supernova Remnant IC 443 when Emission Meets Extinction
• A new look at the integrated radio/microwave continuum spectrum of Galactic supernova remnant IC443