X-rays from superbubbles in the Large Magellanic Cloud. VI. A sample of thirteen superbubbles

Bryan C. Dunne, Sean D. Points, You Hua Chu

Research output: Contribution to journalArticlepeer-review

Abstract

We present ROSAT observations and analysis of thirteen superbubbles in the Large Magellanic Cloud. Eleven of these observations have not been previously reported. We have studied the X-ray morphology of the superbubbles and have extracted and analyzed their X-ray spectra. Diffuse X-ray emission is detected from each of these superbubbles, and X-ray emission is brighter than that theoretically expected for a wind-blown bubble, suggesting that the X-ray emission from the superbubbles has been enhanced by interactions between the superbubble shell and interior supernova remnants. We have also found significant positive correlations between the X-ray luminosity of a superbubble and its Hα luminosity, expansion velocity, and OB star count. Further, we have found that a large fraction of the superbubbles in the sample show evidence of breakout regions, where hot X-ray-emitting gas extends beyond the Hα shell.

Original languageEnglish (US)
Pages (from-to)119-135
Number of pages17
JournalAstrophysical Journal, Supplement Series
Volume136
Issue number1
DOIs
StatePublished - Sep 2001

Keywords

  • Galaxies: individual (Large Magellanic Cloud)
  • ISM: bubbles

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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