The slim-disk state of the ultraluminous X-ray source in M83
The transient ULX in M83 that went into outburst in, or shortly before, 2010 is still active. Our new XMM-Newton spectra show that it has a curved spectrum typical of the upper end of the high/soft state or slim-disk state. It appears to be spanning the gap between Galactic stellar-mass black holes...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Institute of Physics Publishing
2015
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| Online Access: | http://hdl.handle.net/20.500.11937/33376 |
| _version_ | 1848753929093906432 |
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| author | Soria, Roberto Kuntz, K. Long, K. Blair, W. Plucinsky, P. Winkler, P. |
| author_facet | Soria, Roberto Kuntz, K. Long, K. Blair, W. Plucinsky, P. Winkler, P. |
| author_sort | Soria, Roberto |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | The transient ULX in M83 that went into outburst in, or shortly before, 2010 is still active. Our new XMM-Newton spectra show that it has a curved spectrum typical of the upper end of the high/soft state or slim-disk state. It appears to be spanning the gap between Galactic stellar-mass black holes (BHs) and the ultraluminous state, at X-ray luminosities of ≈1-3 × 1039 erg s–1 (a factor of two lower than in the 2010 and 2011 Chandra observations). From its broadened disk-like spectral shape at that luminosity, and from the fitted inner-disk radius and temperature, we argue that the accreting object is an ordinary stellar-mass BH with M ~ 10-20 M ☉. We suggest that in the 2010 and 2011 Chandra observations, the source was seen at a higher accretion rate, resulting in a power-law-dominated spectrum with a soft excess at large radii. |
| first_indexed | 2025-11-14T08:32:19Z |
| format | Journal Article |
| id | curtin-20.500.11937-33376 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T08:32:19Z |
| publishDate | 2015 |
| publisher | Institute of Physics Publishing |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-333762019-02-19T05:36:13Z The slim-disk state of the ultraluminous X-ray source in M83 Soria, Roberto Kuntz, K. Long, K. Blair, W. Plucinsky, P. Winkler, P. The transient ULX in M83 that went into outburst in, or shortly before, 2010 is still active. Our new XMM-Newton spectra show that it has a curved spectrum typical of the upper end of the high/soft state or slim-disk state. It appears to be spanning the gap between Galactic stellar-mass black holes (BHs) and the ultraluminous state, at X-ray luminosities of ≈1-3 × 1039 erg s–1 (a factor of two lower than in the 2010 and 2011 Chandra observations). From its broadened disk-like spectral shape at that luminosity, and from the fitted inner-disk radius and temperature, we argue that the accreting object is an ordinary stellar-mass BH with M ~ 10-20 M ☉. We suggest that in the 2010 and 2011 Chandra observations, the source was seen at a higher accretion rate, resulting in a power-law-dominated spectrum with a soft excess at large radii. 2015 Journal Article http://hdl.handle.net/20.500.11937/33376 10.1088/0004-637X/799/2/140 Institute of Physics Publishing fulltext |
| spellingShingle | Soria, Roberto Kuntz, K. Long, K. Blair, W. Plucinsky, P. Winkler, P. The slim-disk state of the ultraluminous X-ray source in M83 |
| title | The slim-disk state of the ultraluminous X-ray source in M83 |
| title_full | The slim-disk state of the ultraluminous X-ray source in M83 |
| title_fullStr | The slim-disk state of the ultraluminous X-ray source in M83 |
| title_full_unstemmed | The slim-disk state of the ultraluminous X-ray source in M83 |
| title_short | The slim-disk state of the ultraluminous X-ray source in M83 |
| title_sort | slim-disk state of the ultraluminous x-ray source in m83 |
| url | http://hdl.handle.net/20.500.11937/33376 |