Superbubbles in the Large Magellanic Cloud

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Supernovae, Supernova Remnants, Diffuse (Galactic) Emission And Isolated Neutron Stars, Lha 120-N 57 Sb, Xmm-Newton Proposal 04003201

Scientific paper

Superbubbles (SBs) are formed by the combined actions of stellar winds and supernova explosions from massive stars in OB associations. These objects contribute significantly to the hot gas component of a galaxy's interstellar medium (ISM), as well as affecting the structure of the ISM to large scales. We propose XMM-Newton observations of two X-ray prominent superbubbles, N57 and N206, in the Large Magellanic Cloud. From these X-ray spectral data, we will investigate (a) the energy budgets of the SBs, and whether those are consistent with expected stellar-wind inputs; (b) the required input of SNRs to these SBs to obtain the observed energies; and (c) enhanced abundances indicating recent enrichment by SN ejecta.

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