X-rays from superbubbles in the Large Magellanic Cloud

You Hua Chu, Mordecai Mark Mac Low

Research output: Contribution to journalArticlepeer-review

Abstract

We find diffuse X-ray emission not associated with known supernova remnants (SNRs) in seven Large Magellanic Cloud H II complexes encompassing 10 OB associations: N44, N51D, N57A, N70, N154, N157 (30 Dor), and N158. Their X-ray luminosities range from 7 × 1034 ergs s-1 in N57A to 7 × 1036 ergs s-1 in 30 Dor. All, except 30 Dor, have simple ring morphologies, indicating shell structures. Modeling these as superbubbles, we find that the X-ray luminosities expected from their hot interiors fall an order of magnitude below the observed values. SNRs close to the center of a superbubble add very little emission, but we calculate that off-center SNRs hitting the ionized shell could explain the observed emission.

Original languageEnglish (US)
Pages (from-to)510-521
Number of pages12
JournalAstrophysical Journal
Volume365
Issue number2
DOIs
StatePublished - Dec 20 1990

Keywords

  • Clusters: associations
  • Galaxies: Magellanic Clouds
  • Nebulae: H II regions
  • Nebulae: supernova remnants
  • X-rays: sources

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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