Title

Chandra Observations of the Luminous, Oxygen‐rich Supernova Remnants in the Irregular Galaxy NGC 4449

Document Type

Article

Publication Date

4-10-2003

Publication Title

The Astrophysical Journal

Abstract

An analysis of a 29 ks Chandra ACIS-S observation of the young, Cassiopeia A–like supernova remnant in the irregular galaxy NGC 4449 is presented. The observed 0.5–2.1 keV spectrum reveals the likely presence of several emission lines. A nonequilibrium ionization fit to the spectrum suggests an overabundance of oxygen around 20 times solar, consistent with the remnant’s UV and optical emission-line properties. We discuss the remnant’s approximate X-ray–derived elemental abundances and compare its X-ray spectrum and luminosity with other oxygen-rich remnants

DOI

10.1086/368124

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