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Chandra Observation of the Magellanic Cloud Supernova Remnant 0454-672 in N9

F. D. Seward·R. M. Williams·Y. -H. Chu·J. R. Dickel·R. C. Smith·S. D. Points
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Abstract

A Chandra observation has defined the extent of the SNR B 0454-692 in the LMC H II region N9. The remnant has dimension 2.3" x 3.6" and is elongated in the NS direction. The brightest emission comes from a NS central ridge which includes three bright patches. There is good agreement between X-ray and [O III] and [S II] morphology. The remnant is old enough so that optical data give more information about dynamics than do the X-ray data. The SN energy release was >= 4 x 10^50 ergs and the age is ~3 x 10^4 years. There are several unresolved sources nearby but none are clearly associated with the remnant. The X-ray spectrum is soft and indicates enhanced Fe abundance in the central region, consistent with a Type Ia SN origin, but a Type II origin cannot be ruled out.

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F. D. Seward, R. M. Williams, Y. -H. Chu, J. R. Dickel, R. C. Smith, S. D. Points. 2005-11-21. Chandra Observation of the Magellanic Cloud Supernova Remnant 0454-672 in N9. https://doi.org/10.1086/499767

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