Integral Field Spectroscopy of Supernova Remnant 1E0102-7219 Reveals Fast-moving Hydrogen and Sulfur-rich Ejecta

Ivo R. Seitenzahl, Frédéric P.A. Vogt, Jason P. Terry, Parviz Ghavamian, Michael A. Dopita, Ashley J. Ruiter, Tuguldur Sukhbold

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    11 Citations (Scopus)

    Abstract

    We study the optical emission from heavy element ejecta in the oxygen-rich young supernova remnant 1E 0102.2-7219 (1E 0102) in the Small Magellanic Cloud. We have used the Multi-Unit Spectroscopic Explorer optical integral field spectrograph at the Very Large Telescope on Cerro Paranal and the wide field spectrograph (WiFeS) at the ANU 2.3 m telescope at Siding Spring Observatory to obtain deep observations of 1E 0102. Our observations cover the entire extent of the remnant from below 3500 to 9350. Our observations unambiguously reveal the presence of fast-moving ejecta emitting in [S ii], [S iii], [Ar iii], and [Cl ii]. The sulfur-rich ejecta appear more asymmetrically distributed compared to oxygen or neon, a product of carbon burning. In addition to the forbidden line emission from products of oxygen burning (S, Ar, Cl), we have also discovered Hα and Hβ emission from several knots of low surface brightness, fast-moving ejecta. The presence of fast-moving hydrogen points toward a progenitor that had not entirely shed its hydrogen envelope prior to the supernova. The explosion that gave rise to 1E 0102 is therefore commensurate with a Type IIb supernova.

    Original languageEnglish
    Article numberL32
    JournalAstrophysical Journal Letters
    Volume853
    Issue number2
    DOIs
    Publication statusPublished - 1 Feb 2018

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