Journal
ASTROPHYSICAL JOURNAL
Volume 764, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/764/1/50
Keywords
ISM: supernova remnants; supernovae: individual (W49 B); X-rays: ISM
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Funding
- National Aeronautics and Space Administration through Chandra Award [GO2-13003A]
- National Aeronautics and Space Administration through Smithsonian Astrophysical Observatory by the Chandra X-ray Observatory Center [SV3-73016]
- NASA [NAS8-03060, PF1-120085]
- David and Lucile Packard Foundation
- NSF [AST-0847563]
- MIT Pappalardo Fellowship in Physics
- NASA through the Smithsonian Astrophysical Observatory [SV3-73016]
- Direct For Mathematical & Physical Scien
- Division Of Astronomical Sciences [0847563] Funding Source: National Science Foundation
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We present results from a 220 ks observation of the Galactic supernova remnant (SNR) W49B using the Advanced CCD Imaging Spectrometer on board the Chanrda X-ray Observatory. We exploit these data to perform detailed spatially resolved spectroscopic analyses across the SNR with the aim to investigate the thermodynamic properties and explosive origin of W49B. We find substantial variation in the electron temperature and absorbing column toward W49B, and we show that the mean metal abundances are consistent with the predicted yields in models of bipolar/jet-driven core-collapse SNe. Furthermore, we set strict upper limits on the X-ray luminosity of any undetected point sources, and we exclude the presence of a neutron star associated with W49B. We conclude that the morphological, spectral, and environmental characteristics of W49B are indicative of a bipolar Type Ib/Ic SN origin, making it the first of its kind to be discovered in the Milky Way.
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