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DCフィールド | 値 | 言語 |
---|---|---|
dc.contributor.author | Ozawa, M. | en |
dc.contributor.author | Koyama, K. | en |
dc.contributor.author | Yamaguchi, H. | en |
dc.contributor.author | Masai, K. | en |
dc.contributor.author | Tamagawa, T. | en |
dc.contributor.alternative | 小澤, 碧 | ja |
dc.date.accessioned | 2011-04-19T02:20:25Z | - |
dc.date.available | 2011-04-19T02:20:25Z | - |
dc.date.issued | 2009-11-30 | - |
dc.identifier.issn | 0004-637X | - |
dc.identifier.uri | http://hdl.handle.net/2433/139435 | - |
dc.description.abstract | We present a hard X-ray spectrum of unprecedented quality of the Galactic supernova remnant (SNR) W49B obtained with the Suzaku satellite. The spectrum exhibits an unusual structure consisting of a saw-edged bump above 8 keV. This bump cannot be explained by any combination of high-temperature plasmas in ionization equilibrium. We firmly conclude that this bump is caused by the strong radiative recombination continuum (RRC) of iron, detected for the first time in a SNR. The electron temperature derived from the bremsstrahlung continuum shape and the slope of the RRC is ~1.5 keV. On the other hand, the ionization temperature derived from the observed intensity ratios between the RRC and Kα lines of iron is ~2.7 keV. These results indicate that the plasma is in a highly overionized state. Volume emission measures independently determined from the fluxes of the thermal and RRC components are consistent with each other, suggesting the same origin of these components. | en |
dc.format.mimetype | application/pdf | - |
dc.language.iso | eng | - |
dc.publisher | The American Astronomical Society | en |
dc.rights | © 2009 The American Astronomical Society | en |
dc.subject | ISM: individual (W49B) | en |
dc.subject | radiation mechanisms: thermal | en |
dc.subject | supernova remnants | en |
dc.subject | X-rays: ISM | en |
dc.title | SUZAKU DISCOVERY OF THE STRONG RADIATIVE RECOMBINATION CONTINUUM OF IRON FROM THE SUPERNOVA REMNANT W49B | en |
dc.type | journal article | - |
dc.type.niitype | Journal Article | - |
dc.identifier.ncid | AA00553242 | - |
dc.identifier.jtitle | The Astrophysical Journal | en |
dc.identifier.volume | 706 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | L71 | - |
dc.identifier.epage | L75 | - |
dc.relation.doi | 10.1088/0004-637X/706/1/L71 | - |
dc.textversion | publisher | - |
dcterms.accessRights | open access | - |
出現コレクション: | 学術雑誌掲載論文等 |
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