X-RAY EMISSION FROM THE WOLF-RAYET BUBBLE S 308
The Wolf-Rayet (WR) bubble S 308 around the WR star HD 50896 is one of the only two WR bubbles known to possess X-ray emission. We present XMM-Newton observations of three fields of this WR bubble that, in conjunction with an existing observation of its northwest quadrant, map most of the nebula. Th...
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| Veröffentlicht in: | The Astrophysical journal 2012-08, Vol.755 (1), p.1-11 |
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| container_title | The Astrophysical journal |
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| creator | TOALA, J. A GUERRERO, M. A CHU, Y.-H GRUENDL, R. A ARTHUR, S. J SMITH, R. C SNOWDEN, S. L |
| description | The Wolf-Rayet (WR) bubble S 308 around the WR star HD 50896 is one of the only two WR bubbles known to possess X-ray emission. We present XMM-Newton observations of three fields of this WR bubble that, in conjunction with an existing observation of its northwest quadrant, map most of the nebula. The X-ray emission from S 308 displays a limb-brightened morphology, with a central cavity ~22' in size and a shell thickness of ~8'. This X-ray shell is confined by the optical shell of ionized material. The spectrum is dominated by the He-like triplets of N VI at 0.43 keV and OVII at 0.57 keV, and declines toward high energies, with a faint tail up to 1 keV. This spectrum can be described by a two-temperature optically thin plasma emission model (T sub(1) ~ 1.1 x 10 super(6) K, T sub(2) ~ 13 x 10 super(6) K), with a total X-ray luminosity ~2 x 10 super(33) erg s super(-1) at the assumed distance of 1.5 kpc. |
| doi_str_mv | 10.1088/0004-637X/755/1/77 |
| format | Article |
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The spectrum is dominated by the He-like triplets of N VI at 0.43 keV and OVII at 0.57 keV, and declines toward high energies, with a faint tail up to 1 keV. 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A</creatorcontrib><creatorcontrib>GUERRERO, M. A</creatorcontrib><creatorcontrib>CHU, Y.-H</creatorcontrib><creatorcontrib>GRUENDL, R. A</creatorcontrib><creatorcontrib>ARTHUR, S. J</creatorcontrib><creatorcontrib>SMITH, R. C</creatorcontrib><creatorcontrib>SNOWDEN, S. L</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>OSTI.GOV</collection><jtitle>The Astrophysical journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>TOALA, J. A</au><au>GUERRERO, M. 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| subjects | ASTRONOMY ASTROPHYSICS ASTROPHYSICS, COSMOLOGY AND ASTRONOMY Bubbles Displays DISTANCE Earth, ocean, space Emission EMISSION SPECTRA Exact sciences and technology Holes KEV RANGE LUMINOSITY Mathematical models NEBULAE Northwest OPTICALLY THIN PLASMA PHOTON EMISSION STELLAR WINDS TRIPLETS WOLF-RAYET STARS X RADIATION X-rays XMM (spacecraft) |
| title | X-RAY EMISSION FROM THE WOLF-RAYET BUBBLE S 308 |
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