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- Copyright
- Copyright © 2014. The American Astronomical Society. All rights reserved.
- ISSN
- 0004-6256
- eISSN
- 1538-3881
- DOI
- 10.1088/0004-6256/148/5/102
- Publisher site
- See Article on Publisher Site
Abstract
We present a study of the diffuse X-ray emission from superbubbles (SBs) N70 (DEM L301) and N185 (DEM L25) located in the Large Magellanic Cloud, based on data from the XMM-Newton Satellite. We obtained spectra and images of these objects in the soft X-ray energy band. These X-ray spectra were fitted by a thermal plasma model, with temperatures of K and K, for N70 and N185, respectively. For N70, images show that X-ray emission comes from the inner regions of the SB when we compare the distribution of the X-ray and the optical emission, while for N185, the X-ray emission is partially confined by the optical shell. We suggest that the observed X-ray emission is caused by shock-heated gas, inside of the optical shells. We also obtained X-ray luminosities which exceed the values predicted by the standard analytical model. This fact shows that, in addition to the winds of the interior stars, it is necessary to consider another ingredient in the description, such as a supernova explosion, as has been proposed in previous numerical models.
Journal
The Astronomical Journal – IOP Publishing
Published: Nov 1, 2014