Thermal X-ray Emission in the Western Half of the LMC Superbubble 30 Dor C
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| Main Authors: | , , , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916299639095296 |
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| author | Chi, Yi-Heng Chen, Han-Xiao Chen, Yang Meng, Yi-Fan Zhou, Ping Sun, Lei Sun, Wei |
| author_facet | Chi, Yi-Heng Chen, Han-Xiao Chen, Yang Meng, Yi-Fan Zhou, Ping Sun, Lei Sun, Wei |
| contents | While 30 Dor C is a unique superbubble in the Large Magellanic Cloud for its luminous non-thermal X-ray emission, the thermal X-ray emission it emanates has not yet been thoroughly investigated and well constrained. Based on the separate ~1 Ms deep XMM-Newton and Chandra observations, we report the discovery of the thermally-emitting plasma in some portions of the western half of 30 Dor C. The thermal emission can be reproduced by a collisional-ionization-equilibrium plasma model with an average electron temperature of ~0.4 keV. We find a significant overabundance of the intermediate-mass elements such as O, Ne, Mg, and Si, which may be indicative of a recent supernova explosion in 30 Dor C. Dynamical properties in combination with the information of the OB association LH 90 suggest that the internal post-main-sequence stars dominate the power of the superbubble and blow it out in the past ~1 Myr. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2404_04778 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Thermal X-ray Emission in the Western Half of the LMC Superbubble 30 Dor C Chi, Yi-Heng Chen, Han-Xiao Chen, Yang Meng, Yi-Fan Zhou, Ping Sun, Lei Sun, Wei High Energy Astrophysical Phenomena While 30 Dor C is a unique superbubble in the Large Magellanic Cloud for its luminous non-thermal X-ray emission, the thermal X-ray emission it emanates has not yet been thoroughly investigated and well constrained. Based on the separate ~1 Ms deep XMM-Newton and Chandra observations, we report the discovery of the thermally-emitting plasma in some portions of the western half of 30 Dor C. The thermal emission can be reproduced by a collisional-ionization-equilibrium plasma model with an average electron temperature of ~0.4 keV. We find a significant overabundance of the intermediate-mass elements such as O, Ne, Mg, and Si, which may be indicative of a recent supernova explosion in 30 Dor C. Dynamical properties in combination with the information of the OB association LH 90 suggest that the internal post-main-sequence stars dominate the power of the superbubble and blow it out in the past ~1 Myr. |
| title | Thermal X-ray Emission in the Western Half of the LMC Superbubble 30 Dor C |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2404.04778 |