A chandra observation of SNR 0540 - 697

F. D. Seward, R. M. Williams, Y. H. Chu, R. A. Gruendl, J. R. Dickel

Research output: Contribution to journalArticlepeer-review


This paper describes a Chandra observation of SNR 0540 - 697 within the H II complex N159 in the Large Magellanic Cloud (LMC). Scattering from the nearby bright source LMC X-1, which obscures the western edge of the remnant, has been removed. Larger than previously believed, the 20 × 28 remnant is defined by optical filaments and two lobes of X-ray emission. A band of intervening material absorbs X-rays from the central part of the remnant. The N Lobe of the remnant is relatively bright and well defined, while emission from the S Lobe is much weaker. There is structure within the N Lobe but no clear X-ray emission from an outer shell indicating a shock in the interstellar medium. The X-ray spectrum is thermal with emission lines from Fe, Mg, and Si. The observed temperature and luminosity of the hot gas are 0.6keV and 6 × 10 35ergs-1, respectively. These are consistent with characteristics expected for older remnants. There is also diffuse thermal X-ray emission north of N159 extending into N160, evidence for a larger remnant or bubble.

Original languageEnglish (US)
Pages (from-to)177-183
Number of pages7
JournalAstronomical Journal
Issue number1
StatePublished - 2010


  • Dust
  • Extinction
  • HII regions
  • ISM: supernova remnants
  • Magellanic Clouds
  • Techniques: image Processing
  • X-rays: individual (SNR 0540?697)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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