Chandra Observations of SNR RCW 103

Abstract

We analyze three Chandra observations, with a combined exposure time of 99 ks, of the Galactic supernova remnant RCW 103, a young supernova remnant, previously with no clear detection of metal-rich ejecta. Based on our imaging and spectral analyses of these deep Chandra data, we find evidence for metal-rich ejecta emission scattered throughout the remnant. X-ray emission from the shocked ejecta is generally weak, and the shocked circumstellar medium (CSM) is a largely dominant component across the entire remnant. The CSM component shows abundances of ~0.5 solar, while Ne, Mg, Si, S, and Fe abundances of the ejecta are up to a few times solar. Comparison of these ejecta abundances with yields from supernova nucleosynthesis models suggests, together with the existence of a central neutron star, a progenitor mass of ~18-20 M${}_{\odot }$, though the Fe/Si ratios are larger than predicted. The shocked CSM emission suggests a progenitor with high mass-loss rate and subsolar metallicity.

14 pages, 10 figures, Accepted to ApJ

References in corpus (7)

• The Nature of the Compact X-ray Source in Supernova Remnant RCW 103
• 1E161348-5055 in the Supernova Remnant RCW 103: A Magnetar in a Young Low Mass Binary System?
• Deep infrared observations of the puzzling central X-ray source in RCW103
• Spatially Resolved X-ray Spectroscopy of Vela Shrapnel A
• An Atomic and Molecular Study of the Interstellar Medium Around the SNR RCW 103
• A new look at the origin of the 6.67\,hr period X-ray pulsar 1E~161348-5055
• The likely Fermi Detection of the Supernova Remnant RCW 103

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